[Federal Register Volume 87, Number 241 (Friday, December 16, 2022)]
[Rules and Regulations]
[Pages 77298-77328]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2022-26418]



[[Page 77297]]

Vol. 87

Friday,

No. 241

December 16, 2022

Part III





Department of Energy





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10 CFR Parts 429 and 431





Energy Conservation Program: Test Procedure for Air-Cooled, Three-
Phase, Small Commercial Package Air Conditioning and Heating Equipment 
With a Cooling Capacity of Less Than 65,000 Btu/h and Air-Cooled, 
Three-Phase, Variable Refrigerant Flow Air Conditioners and Heat Pumps 
With a Cooling Capacity of Less Than 65,000 Btu/h; Final Rule

  Federal Register / Vol. 87, No. 241 / Friday, December 16, 2022 / 
Rules and Regulations  

[[Page 77298]]


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DEPARTMENT OF ENERGY

10 CFR Parts 429 and 431

[EERE-2017-BT-TP-0031]
RIN 1904-AE06


Energy Conservation Program: Test Procedure for Air-Cooled, 
Three-Phase, Small Commercial Package Air Conditioning and Heating 
Equipment With a Cooling Capacity of Less Than 65,000 Btu/h and Air-
Cooled, Three-Phase, Variable Refrigerant Flow Air Conditioners and 
Heat Pumps With a Cooling Capacity of Less Than 65,000 Btu/h

AGENCY: Office of Energy Efficiency and Renewable Energy, Department of 
Energy.

ACTION: Final rule.

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SUMMARY: The U.S. Department of Energy (``DOE'') amends its test 
procedures for air-cooled, three-phase, small commercial package air 
conditioning and heating equipment with a cooling capacity of less than 
65,000 British thermal units per hour (``Btu/h'') and air-cooled, 
three-phase, variable refrigerant flow air conditioners and heat pumps 
with a cooling capacity of less than 65,000 Btu/h to incorporate by 
reference the latest version of the relevant industry test standard. 
DOE adopts the seasonal energy efficiency ratio 2 (``SEER2'') and 
heating seasonal performance factor 2 (``HSPF2'') metrics specified by 
that industry test standard in the DOE test procedures for the three-
phase equipment that is the subject of this final rule. Additionally, 
DOE amends certain provisions for representations and enforcement for 
this equipment to harmonize with single-phase products.

DATES: The effective date of this rule is January 17, 2023. The final 
rule changes will be mandatory for product testing starting December 
11, 2023. The incorporation by reference of certain material listed in 
the rule is approved by the Director of the Federal Register on January 
17, 2023. The incorporation by reference of certain other material 
listed in the rule was approved by the Director of the Federal Register 
on February 6, 2017.

ADDRESSES: The docket, which includes Federal Register notices, public 
meeting webinar attendee lists and transcripts, comments, and other 
supporting documents/materials, is available for review at 
www.regulations.gov. All documents in the docket are listed in the 
www.regulations.gov index. However, not all documents listed in the 
index may be publicly available, such as those containing information 
that is exempt from public disclosure.
    A link to the docket web page can be found at www.regulations.gov/docket/EERE-2017-BT-TP-0031. The docket web page contains instructions 
on how to access all documents, including public comments, in the 
docket.
    For further information on how to review the docket, contact the 
Appliance and Equipment Standards Program staff at (202) 287-1445 or by 
email: [email protected].

FOR FURTHER INFORMATION CONTACT: Ms. Catherine Rivest, U.S. Department 
of Energy, Office of Energy Efficiency and Renewable Energy, Building 
Technologies Office, EE-2J, 1000 Independence Avenue SW, Washington, 
DC, 20585-0121. Telephone: (202) 586-7335. Email: 
[email protected]. Ms. Kristin Koernig, U.S. 
Department of Energy, Office of the General Counsel, GC-33, 1000 
Independence Avenue SW, Washington, DC, 20585-0121. Telephone: (202) 
586-8145. Email: [email protected].

SUPPLEMENTARY INFORMATION: DOE incorporates by reference the following 
industry standards as follows:

ANSI/AHRI Standard 210/240-2008, ``2008 Standard for Performance Rating 
of Unitary Air-Conditioning & Air-Source Heat Pump Equipment'', 
approved 2011 and updated by addendum 1 in June 2011 and addendum 2 in 
March 2012 (``ANSI/AHRI 210/240-2008'')--into part 431.
AHRI Standard 210/240-2023, ``2023 Performance Rating of Unitary Air-
conditioning & Air-source Heat Pump Equipment'', copyright 2020 (``AHRI 
210/240-2023'')--into parts 429 and 431.
ANSI/AHRI Standard 1230-2010, ``2010 Standard for Performance Rating of 
Variable Refrigerant Flow Multi-Split Air-Conditioning and Heat Pump 
Equipment'', approved August 2, 2010 and updated by addendum 1 in March 
2011 (``ANSI/AHRI 1230-2010'')--into part 431.

    Copies of these standards can be obtained from the AHRI website by 
going to www.ahrinet.org.\1\
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    \1\ AHRI 210/240-2008 is available at www.ahrinet.org/app_content/ahri/files/standards%20pdfs/ansi%20standards%20pdfs/ansi.ahri%20standard%20210.240%20with%20addenda%201%20and%202.pdf.

ANSI/ASHRAE Standard 37-2009, ``Methods of Testing for Rating 
Electrically Driven Unitary Air-Conditioning and Heat Pump Equipment'', 
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ASHRAE approved June 24, 2009 (``ANSI/ASHRAE 37-2009'')--into part 431.

    Copies of ANSI/ASHRAE 37-2009 can be obtained from the American 
National Standards Institute, 25 W. 43rd Street, 4th Floor, New York, 
NY 10036, (212) 642-4900, or online at webstore.ansi.org.
    See section IV.N of this document for further discussion of these 
standards.

Table of Contents

I. Authority and Background
    A. Authority
    B. Background
II. Synopsis of the Final Rule
III. Discussion
    A. Scope of Applicability
    B. Proposed Organization of the Test Procedure
    C. Metrics
    D. Updates to Industry Standards and Proposed Test Procedures 
for Three-Phase Equipment With Cooling Capacity of Less than 65,000 
Btu/h
    1. Harmonization With Single-Phase Products
    2. AHRI 210/240-2017 and AHRI 210/240-2017 With Addendum 1
    3. AHRI 210/240-2023
    a. Appendix G of AHRI 210/240-2023
    4. AHRI 1230
    5. ASHRAE 37
    E. Certification, Compliance, and Enforcement Requirements
    1. Representation Requirements
    a. Use of Single-Phase AEDM for Rating Three-Phase Equipment
    b. Use of AEDM for Certain Configurations of Three-Phase 
Equipment
    c. Coil-Only Ratings for Single-Split-System Air Conditioners
    2. Basic Model Definition
    3. Certification Reporting Requirements
    4. Product-Specific Enforcement Provisions
    F. Other Comments Received on the NOPR
    G. Effective and Compliance Dates
    H. Test Procedure Costs
IV. Procedural Issues and Regulatory Review
    A. Review Under Executive Orders 12866 and 13563
    B. Review Under the Regulatory Flexibility Act
    C. Review Under the Paperwork Reduction Act of 1995
    D. Review Under the National Environmental Policy Act of 1969
    E. Review Under Executive Order 13132
    F. Review Under Executive Order 12988
    G. Review Under the Unfunded Mandates Reform Act of 1995
    H. Review Under the Treasury and General Government 
Appropriations Act, 1999
    I. Review Under Executive Order 12630
    J. Review Under Treasury and General Government Appropriations 
Act, 2001
    K. Review Under Executive Order 13211
    L. Review Under Section 32 of the Federal Energy Administration 
Act of 1974
    M. Congressional Notification
    N. Description of Materials Incorporated by Reference

[[Page 77299]]

V. Approval of the Office of the Secretary

I. Authority and Background

    Small, large, and very large commercial package air conditioning 
and heating equipment are included in the list of ``covered equipment'' 
for which the U.S. Department of Energy (``DOE'' or the ``Department'') 
is authorized to establish and amend energy conservation standards and 
test procedures. (42 U.S.C. 6311(1)(B)-(D)) Air-cooled, three-phase, 
small commercial air conditioners and heat pumps with a cooling 
capacity of less than 65,000 British thermal units per hour (``Btu/h'') 
(``3-phase ACUACs and ACUHPs with cooling capacity of less than 65,000 
Btu/h'') \2\ and air-cooled, three-phase, variable refrigerant flow 
(``VRF'' or ``VRF multi-split systems'') air conditioners and heat 
pumps with a cooling capacity of less than 65,000 Btu/h (``3-phase VRF 
with cooling capacity of less than 65,000 Btu/h'') \3\ are two separate 
categories of small commercial package air conditioning and heating 
equipment. DOE's test procedures and energy conservation standards for 
3-phase ACUACs and ACUHPs with cooling capacity of less than 65,000 
Btu/h and for 3-phase VRF with cooling capacity of less than 65,000 
Btu/h are currently prescribed at Title 10 of the Code of Federal 
Regulations (``CFR'') parts 431.96 and 431.97, respectively. The 
following sections discuss DOE's authority to establish test procedures 
for 3-phase ACUACs and ACUHPs with cooling capacity of less than 65,000 
Btu/h and for 3-phase VRF with cooling capacity of less than 65,000 
Btu/h and relevant background information regarding DOE's consideration 
of test procedures for this equipment.
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    \2\ ACUACs and ACUHPs are ``air-cooled commercial unitary air 
conditioners'' and ``air-cooled commercial unitary heat pumps.'' 
These terms are consistent with those typically used for similar 
equipment with a cooling capacity of greater than or equal to 65,000 
Btu/h.
    \3\ As used in this rulemaking, the term ``3-phase VRF with 
cooling capacity of less than 65,000 Btu/h'' refers only to air-
cooled equipment.
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A. Authority

    The Energy Policy and Conservation Act, as amended (``EPCA''),\4\ 
authorizes DOE to regulate the energy efficiency of a number of 
consumer products and certain industrial equipment. (42 U.S.C. 6291-
6317, as codified) Title III, Part C \5\ of EPCA, added by Public Law 
95-619, Title IV, section 441(a), established the Energy Conservation 
Program for Certain Industrial Equipment, which sets forth a variety of 
provisions designed to improve energy efficiency. This equipment 
includes 3-phase ACUACs and ACUHPs with cooling capacity of less than 
65,000 Btu/h and 3-phase VRF with cooling capacity of less than 65,000 
Btu/h, the subjects of this final rule. (42 U.S.C. 6311(1)(B))
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    \4\ All references to EPCA in this document refer to the statute 
as amended through the Energy Act of 2020, Public Law 116-260 (Dec. 
27, 2020), which reflect the last statutory amendments that impact 
Parts A and A-1 of EPCA.
    \5\ For editorial reasons, upon codification in the U.S. Code, 
Part C was redesignated Part A-1.
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    The energy conservation program under EPCA consists essentially of 
four parts: (1) testing, (2) labeling, (3) the establishment of Federal 
energy conservation standards, and (4) certification and enforcement 
procedures. Relevant provisions of EPCA include definitions (42 U.S.C. 
6311), test procedures (42 U.S.C. 6314), labeling provisions (42 U.S.C. 
6315), energy conservation standards (42 U.S.C. 6313), and the 
authority to require information and reports from manufacturers (42 
U.S.C. 6316; 42 U.S.C. 6296).
    The Federal testing requirements consist of test procedures that 
manufacturers of covered equipment must use as the basis for (1) 
certifying to DOE that their equipment complies with the applicable 
energy conservation standards adopted pursuant to EPCA (42 U.S.C. 
6316(b); 42 U.S.C. 6296), and (2) making other representations about 
the efficiency of that equipment (42 U.S.C. 6314(d)). Similarly, DOE 
uses these test procedures to determine whether the equipment complies 
with relevant standards promulgated under EPCA.
    Federal energy efficiency requirements for covered equipment 
established under EPCA generally supersede State laws and regulations 
concerning energy conservation testing, labeling, and standards. (42 
U.S.C. 6316(a)-(b); 42 U.S.C. 6297) DOE may, however, grant waivers of 
Federal preemption for particular State laws or regulations, in 
accordance with the procedures and other provisions of EPCA. (42 U.S.C. 
6316(b)(2)(D))
    Under 42 U.S.C. 6314, EPCA sets forth the criteria and procedures 
DOE must follow when prescribing or amending test procedures for 
covered equipment. EPCA requires that any test procedures prescribed or 
amended under this section must be reasonably designed to produce test 
results which reflect energy efficiency, energy use, or estimated 
annual operating cost of a given type of covered equipment during a 
representative average use cycle (as determined by the Secretary) and 
requires that test procedures not be unduly burdensome to conduct. (42 
U.S.C. 6314(a)(2))
    As discussed, 3-phase ACUACs and ACUHPs with cooling capacity of 
less than 65,000 Btu/h and 3-phase VRF with cooling capacity of less 
than 65,000 Btu/h are both categories of small commercial package air 
conditioning and heating equipment. EPCA requires that the test 
procedures for small commercial package air conditioning and heating 
equipment shall be those generally accepted industry testing procedures 
or rating procedures developed or recognized by the Air-Conditioning, 
Heating, and Refrigeration Institute (``AHRI'') or by the American 
Society of Heating, Refrigerating and Air-Conditioning Engineers 
(``ASHRAE''), as referenced in ASHRAE Standard 90.1, ``Energy Standard 
for Buildings Except Low-Rise Residential Buildings'' (``ASHRAE 
Standard 90.1''). (42 U.S.C. 6314(a)(4)(A)) Further, if that industry 
test procedure is amended, DOE must amend its test procedure to be 
consistent with the amended industry test procedure, unless DOE 
determines, by rule published in the Federal Register and supported by 
clear and convincing evidence, that such amended test procedure would 
not meet the requirements in 42 U.S.C. 6314(a)(2) and (3) related to 
representative use and test burden. (42 U.S.C. 6314(a)(4)(B))
    EPCA also requires that, at least once every 7 years, DOE shall 
evaluate test procedures for each type of covered equipment, including 
those addressed in this final rule, to determine whether amended test 
procedures would more accurately or fully comply with the requirements 
for the test procedures to not be unduly burdensome to conduct and be 
reasonably designed to produce test results that reflect energy 
efficiency, energy use, and estimated operating costs during a 
representative average use cycle. (42 U.S.C. 6314(a)(1))
    In addition, if the Secretary determines that a test procedure 
amendment is warranted, DOE must publish the proposed test procedure in 
the Federal Register and afford interested persons an opportunity (of 
not less than 45 days' duration) to present oral and written data, 
views, and comments on the proposed test procedure. (42 U.S.C. 6314(b)) 
If DOE determines that test procedure revisions are not appropriate, 
DOE must publish its determination not to amend the test procedure. (42 
U.S.C. 6314(a)(1)(A)(ii)) DOE is publishing this final rule consistent 
with its obligations under EPCA.

B. Background

    DOE's current test procedures for 3-phase ACUACs and ACUHPs with 
cooling capacity of less than 65,000 Btu/h and for 3-phase VRF with 
cooling

[[Page 77300]]

capacity of less than 65,000 Btu/h are codified at 10 CFR 431.96.
    The Federal test procedure for 3-phase ACUACs and ACUHPs with 
cooling capacity of less than 65,000 Btu/h was last amended in a final 
rule published in the Federal Register on May 16, 2012, to incorporate 
by reference American National Standards Institute (``ANSI'')/AHRI 
Standard 210/240-2008, ``Performance Rating of Unitary Air-Conditioning 
& Air-Source Heat Pump Equipment'' (``ANSI/AHRI 210/240-2008''). 77 FR 
28928 (``May 2012 final rule''). The May 2012 final rule also 
established additional testing requirements at 10 CFR 431.96(c) and (e) 
that provide an optional break-in period for testing and add 
specifications regarding the use of manufacturer instructions in set-
up, respectively, applicable to measuring seasonal energy efficiency 
ratio (``SEER'') and heating seasonal performance factor (``HSPF'') for 
this equipment. Id. at 77 FR 28991.
    The Federal test procedure for 3-phase VRF with cooling capacity of 
less than 65,000 Btu/h was also last amended in the May 2012 final rule 
and incorporated by reference ANSI/AHRI Standard 1230-2010, ``2010 
Standard for Performance Rating of Variable Refrigerant Flow Multi-
Split Air-Conditioning and Heat Pump Equipment'' (``ANSI/AHRI 1230-
2010''). The testing requirements at 10 CFR 431.96(c) and (e) also 
apply to VRF multi-split systems. Additionally, the May 2012 final rule 
established additional testing requirements at 10 CFR 431.96(d) and (f) 
that provide for refrigerant line length corrections for tests 
conducted using ANSI/AHRI 1230-2010 and for manufacturer involvement in 
assessment or enforcement testing for VRF multi-split systems, 
respectively. Id.
    In 2017, AHRI published an updated version of its standard 
``Performance Rating of Unitary Air-conditioning & Air-source Heat Pump 
Equipment'' (``AHRI 210/240-2017''). AHRI 210/240-2017 includes a 
number of changes as compared to ANSI/AHRI 210/240-2008 that are 
relevant to DOE's current test procedure, and many of these changes 
were based on DOE's test procedure for single-phase, central air 
conditioners and central air conditioning heat pumps (collectively, 
``CAC/HPs'') with a cooling capacity of less than 65,000 Btu/h.\6\ 
DOE's current test procedures for single-phase CAC/HPs with a cooling 
capacity of less than 65,000 Btu/h are codified at 10 CFR part 430, 
subpart B, appendices M and M1 (``appendix M'' and ``appendix M1'', 
respectively). Prior to January 1, 2023, any representations, including 
compliance certifications, made with respect to the energy use, power, 
or efficiency of CAC/HPs must be based on the results of testing 
pursuant to appendix M. On or after January 1, 2023, any 
representations, including compliance certifications, made with respect 
to the energy use, power, or efficiency of CAC/HPs must be based on the 
results of testing pursuant to appendix M1.
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    \6\ Three-phase equipment models generally are identical 
physically to their single-phase, residential counterparts except 
for the electrical systems and components designed for three-phase 
power input.
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    Following the publication of AHRI 210/240-2017, on October 2, 2018, 
DOE published in the Federal Register a request for information 
(``RFI'') seeking comments on whether DOE should align its test 
procedure (and certification and enforcement requirements) for 3-phase 
ACUACs and ACUHPs with cooling capacity of less than 65,000 Btu/h with 
that of air-cooled, single-phase CAC/HPs with a cooling capacity of 
less than 65,000 Btu/h, consistent with the update to AHRI 210/240-
2017. 83 FR 49501 (``October 2018 RFI'').
    In April 2019, AHRI published ``Performance Rating of Unitary Air-
Conditioning & Air-Source Heat Pump Equipment (with Addendum 1)'' 
(``AHRI 210/240-2017 with Addendum 1''), which incorporated minor 
revisions to definitions, testing requirements, and efficiency 
calculations.
    On October 23, 2019, ASHRAE released ASHRAE Standard 90.1-2019, 
which maintained the reference to AHRI Standard 210/240 as the industry 
testing standard for 3-phase ACUACs and ACUHPs with cooling capacity of 
less than 65,000 Btu/h but updated the editions referenced. For the 
period prior to January 1, 2023, ASHRAE Standard 90.1-2019 references 
AHRI 210/240-2017. For the period beginning January 1, 2023, ASHRAE 
Standard 90.1-2019 references AHRI Standard 210/240-2023, ``Performance 
Rating of Unitary Air-conditioning & Air-source Heat Pump Equipment'' 
(``AHRI 210/240-2023'') AHRI 210/240-2023 harmonizes with DOE's 
appendix M1 test procedure and provides for measuring energy efficiency 
using the SEER2 and HSPF2 metrics for CAC/HPs. ASHRAE Standard 90.1-
2019 maintained the reference to AHRI Standard 1230 as the industry 
testing standard for all VRF multi-split systems, including air-cooled, 
three-phase units with a cooling capacity of less than 65,000 Btu/h, 
with an update to reference the most recently published version at the 
time, AHRI 1230-2014 with Addendum 1.\7\
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    \7\ 3-phase VRF with cooling capacity of less than 65,000 Btu/h 
are not excluded from the scope of either AHRI 210/240 (2017 and 
2023) or AHRI 1230-2014 with Addendum 1.
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    In May 2020 and May 2021, AHRI published AHRI 210/240-2023 and AHRI 
1230-2021, respectively. AHRI 1230-2021 excludes from its scope air-
cooled, VRF multi-split systems with a cooling capacity of less than 
65,000 Btu/h. Both AHRI 210/240-2017 with Addendum 1 and AHRI 210/240-
2023 exclude from their scope only VRF multi-split systems that have 
capacities greater than or equal to 65,000 Btu/h. Because AHRI 1230-
2021 explicitly excludes VRF multi-split systems with a cooling 
capacity of less than 65,000 Btu/h from scope, and the scope exclusion 
in AHRI 210/240-2023 applies only to VRF multi-split systems with a 
cooling capacity of 65,000 Btu/h or greater, 3-phase VRF with cooling 
capacity of less than 65,000 Btu/h are included within the scope of 
AHRI 210/240-2023.
    As such, DOE has determined that AHRI 210/240-2023 is now the 
appropriate industry test standard for 3-phase VRF with cooling 
capacity of less than 65,000 Btu/h. 3-phase VRF with cooling capacity 
of less than 65,000 Btu/h do not currently exist on the market, but DOE 
expects that any such equipment introduced to the market in the future 
would likely be identical to air-cooled, single-phase, VRF multi-split 
systems (except for the components designed for three-phase power 
input). Therefore, DOE has determined that it is appropriate to align 
the test procedure for 3-phase VRF with cooling capacity of less than 
65,000 Btu/h (AHRI 210/240-2023) with the test procedure for their 
single-phase counterparts (i.e., appendix M1).
    On December 8, 2021, DOE published a notice of proposed rulemaking 
(``NOPR'') (``December 2021 NOPR'') proposing, in relevant part, to 
update the references in the Federal test procedures to the most recent 
versions of the relevant industry test procedures as they relate to 3-
phase ACUACs and ACUHPs with cooling capacity of less than 65,000 Btu/h 
and 3-phase VRF with cooling capacity of less than 65,000 Btu/h. 86 FR 
70316, 70319. In addition, DOE proposed to update most of its 
representation and enforcement requirements for 3-phase ACUACs and 
ACUHPs with cooling capacity of less than 65,000 Btu/h and for 3-phase 
VRF with cooling capacity of less than 65,000 Btu/h to be consistent 
with those of their consumer product counterparts (i.e., air-cooled, 
single-phase CAC/HPs

[[Page 77301]]

with a cooling capacity of less than 65,000 Btu/h (which include 
single-phase VRF multi-split systems)). Id. DOE held a public meeting 
on January 10, 2022, via a webinar, to present the proposed amendments 
and provide stakeholders with further opportunity to comment.\8\
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    \8\ The transcript of the public meeting is available at https://www.regulations.gov/document/EERE-2017-BT-TP-0031-0012.
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    DOE received comments in response to the December 2021 NOPR from 
the interested parties listed in Table I.1.

          Table I.1--List of Commenters With Written Submissions in Response to the December 2021 NOPR
----------------------------------------------------------------------------------------------------------------
                                  Reference in this  Comment No. in
          Commenter(s)               final rule        the docket                   Commenter type
----------------------------------------------------------------------------------------------------------------
Air-Conditioning, Heating, and   AHRI..............              16  Trade Association.
 Refrigeration Institute.
Appliance Standards Awareness    Joint Advocates...              17  Energy Efficiency Advocates.
 Project (``ASAP''), American
 Council for an Energy-
 Efficient Economy (``ACEEE''),
 and Natural Resources Defense
 Council (``NRDC'').
Pacific Gas and Electric         CA IOUs...........              18  Utilities.
 Company, San Diego Gas and
 Electric, and Southern
 California Edison;
 collectively, the California
 Investor-Owned Utilities.
Carrier Corporation............  Carrier...........              15  Manufacturer.
Lennox International...........  Lennox............              14  Manufacturer.
Northwest Energy Efficiency      NEEA..............              20  Efficiency Advocate.
 Alliance.
New York State Energy Research   NYSERDA...........              13  State Government.
 and Development Authority.
Trane Technologies.............  Trane.............              19  Manufacturer.
----------------------------------------------------------------------------------------------------------------

    A parenthetical reference at the end of a comment quotation or 
paraphrase provides the location of the item in the public record.\9\ 
To the extent that interested parties have provided written comments 
that are substantively consistent with any oral comments provided 
during the January 10, 2022, public meeting, DOE cites the written 
comments throughout this final rule. DOE did not identify any oral 
comments provided during the webinar that are not substantively 
addressed by written comments.
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    \9\ The parenthetical reference provides a reference for 
information located in the docket of DOE's rulemaking to develop 
test procedures for 3-phase ACUACs and ACUHPs with cooling capacity 
of less than 65,000 Btu/h and 3-phase VRF with cooling capacity of 
less than 65,000 Btu/h. (Docket No. EERE-2017-BT-TP-0031, which is 
maintained at www.regulations.gov.) The references are arranged as 
follows: (commenter name, comment docket ID number, page of that 
document).
---------------------------------------------------------------------------

    On March 30, 2022, DOE published in the Federal Register an energy 
conservation standards (``ECS'') NOPR (``March 2022 ECS NOPR'') that 
proposed amended energy conservation standards for 3-phase ACUACs and 
ACUHPs with cooling capacity of less than 65,000 Btu/h and 3-phase VRF 
with cooling capacity of less than 65,000 Btu/h in terms of the new 
cooling and heating metrics, SEER2 and HSPF2, respectively. 87 FR 
18290.

II. Synopsis of the Final Rule

    In this final rule, DOE is updating the references in the Federal 
test procedures to the most recent versions of the relevant industry 
test procedures as they relate to 3-phase ACUACs and ACUHPs with 
cooling capacity of less than 65,000 Btu/h and 3-phase VRF with cooling 
capacity of less than 65,000 Btu/h. Specifically, DOE is updating its 
regulations at 10 CFR 431.96, ``Uniform test method for the measurement 
of energy efficiency of commercial air conditioners and heat pumps,'' 
as follows: (1) to incorporate by reference AHRI 210/240-2023 and ANSI/
ASHRAE 37-2009; and (2) to establish provisions for determining SEER2 
and HSPF2. The current DOE test procedures for all equipment addressed 
in this final rule are relocated to a new appendix F of subpart F to 10 
CFR part 431 (``appendix F'') without change, and the new test 
procedure adopting AHRI 210/240-2023 is established in a new appendix 
F1 of subpart F to 10 CFR part 431 (``appendix F1'') for determining 
SEER2 and HSPF2. Use of appendix F1 is not required until such time as 
compliance is required with amended energy conservation standards that 
rely on SEER2 and HSPF2, should DOE adopt such standards.
    In addition, DOE is updating most of its representation and 
enforcement requirements for 3-phase ACUACs and ACUHPs with cooling 
capacity of less than 65,000 Btu/h and for 3-phase VRF with cooling 
capacity of less than 65,000 Btu/h to be consistent with those of their 
single-phase, consumer product counterparts (i.e., air-cooled, single-
phase CAC/HPs with a cooling capacity of less than 65,000 Btu/h (which 
include single-phase VRF multi-split systems).
    As noted, the current DOE test procedures for all equipment 
addressed in this final rule are being relocated to appendix F without 
change. The adopted amendments for the revised test procedures at 
appendix F1 are summarized in Table II.1 and are compared to the test 
procedure provisions in place prior to these amendments, as well as the 
reason for each adopted change.

      Table II.1--Summary of Changes in the Amended Test Procedures
------------------------------------------------------------------------
  DOE test procedures prior to       Amended test
            amendment                 procedures          Attribution
------------------------------------------------------------------------
Incorporate by reference ANSI/    Incorporate by      EPCA requirement
 AHRI 210/240-2008 (for            reference AHRI      to harmonize with
 equipment other than VRF multi-   210/240-2023 and    industry test
 split systems) and ANSI/AHRI      ANSI/ASHRAE 37-     procedure.
 1230-2010 (for VRF multi-split    2009 in a new
 systems).                         appendix F1 for
                                   all three-phase
                                   equipment subject
                                   to this
                                   rulemaking.

[[Page 77302]]

 
Applicable representation         Amend               Harmonization with
 requirements are those            representation      single-phase
 specified at 10 CFR 429.43 and    requirements at     consumer product
 10 CFR 429.70 for commercial      new 10 CFR 429.67   counterparts and
 heating, ventilating, and air     and 10 CFR          reduction of
 conditioning (``HVAC'')           429.70--including   testing burden on
 equipment.                        basic model         manufacturers.
                                   definition,
                                   tested
                                   combination,
                                   determination of
                                   represented
                                   value, and
                                   alternative
                                   energy
                                   determination
                                   method (``AEDM'')
                                   requirements--lar
                                   gely consistent
                                   with requirements
                                   for single-phase
                                   consumer product
                                   counterparts.
                                  Amended
                                   representation
                                   requirements
                                   allow the use of
                                   an AEDM that is
                                   validated with
                                   testing of
                                   otherwise
                                   identical single-
                                   phase central air
                                   conditioners and
                                   heat pumps for
                                   rating three-
                                   phase, less than
                                   65,000 Btu/h
                                   single package
                                   units and split
                                   systems.
------------------------------------------------------------------------

    DOE has determined that the amendments described in section III of 
this document regarding the establishment of appendix F will not alter 
the measured efficiency of equipment addressed in this document or 
require retesting or recertification solely as a result of DOE's 
adoption of the amendments to the test procedures. However, DOE has 
determined that the test procedures' amendments in appendix F1 will 
alter the measured efficiency of the affected equipment but that such 
amendments are consistent with the updated industry test procedures. 
Further, use of the test procedures in appendix F1 and the amendments 
to the representation requirements in 10 CFR 429.43 and 429.70 are not 
required until the compliance date of amended standards in terms of 
SEER2 and HSPF2, should DOE adopt such standards. Additionally, DOE has 
determined that the amendments will not increase the cost of testing 
relative to the updated industry test procedures.
    The effective date for the amended test procedures adopted in this 
final rule is 30 days after publication of this document in the Federal 
Register. Section III of this document discusses DOE's actions in 
detail.

III. Discussion

    The discussion that follows details the specific changes that DOE 
is making to the current test procedure regulations affecting 3-phase 
ACUACs and ACUHPs with cooling capacity of less than 65,000 Btu/h and 
3-phase VRF with cooling capacity of less than 65,000 Btu/h.

A. Scope of Applicability

    Three-phase ACUACs and ACUHPs with cooling capacity of less than 
65,000 Btu/h and 3-phase VRF with cooling capacity of less than 65,000 
Btu/h are both categories of small commercial package air conditioning 
and heating equipment. Commercial package air-conditioning and heating 
equipment may be air cooled, water cooled, evaporatively cooled, or 
water source based (not including ground water source). This equipment 
is electrically operated and designed as unitary central air 
conditioners or central air conditioning heat pumps for use in 
commercial applications. 10 CFR 431.92.
    As discussed in the December 2021 NOPR, 3-phase ACUACs and ACUHPs 
with cooling capacity of less than 65,000 Btu/h are typically nearly 
identical (and therefore typically have comparable efficiency) to 
single-phase CAC/HPs with rated cooling capacities of less than 65,000 
Btu/h, which are consumer products also subject to EPCA and for which 
DOE has already established energy conservation standards (10 CFR 
430.32(c)) and test procedures (appendices M and M1). 86 FR 70316, 
70320. Based on this ``nearly identical'' relationship, while 3-phase 
VRF with cooling capacity of less than 65,000 Btu/h do not currently 
exist on the market, DOE stated in the December 2021 NOPR that it 
expects that any such equipment introduced to the market in the future 
is likely to be identical (except for the components designed for 
three-phase power input) to their single-phase counterparts, which are 
a subset of single-phase CAC/HPs, and, as such, are also rated using 
appendices M and M1. Id.
    3-phase ACUACs and ACUHPs with cooling capacity of less than 65,000 
Btu/h are further disaggregated into four equipment classes: single-
package air conditioners, single-package heat pumps, split-system air 
conditioners, and split-system heat pumps.\10\ 10 CFR 431.97(b). This 
final rule amends the test procedure applicable to all four equipment 
classes but without amending its current scope. 3-phase VRF with 
cooling capacity of less than 65,000 Btu/h are further disaggregated 
into two equipment classes: air conditioners and heat pumps. 10 CFR 
431.97(f). This final rule amends the test procedure applicable to both 
equipment categories but without amending its current scope.
---------------------------------------------------------------------------

    \10\ The term ``single package unit'' means any central air 
conditioner or central air-conditioning heat pump in which all the 
major assemblies are enclosed in one cabinet. The term ``split 
system'' means any central air conditioner or central air-
conditioning heat pump in which one or more of the major assemblies 
are separate from the others. 10 CFR 431.92.
---------------------------------------------------------------------------

B. Proposed Organization of the Test Procedure

    In the December 2021 NOPR, DOE proposed to relocate and centralize 
the current test procedures for 3-phase ACUACs and ACUHPs with cooling 
capacity of less than 65,000 Btu/h and 3-phase VRF with cooling 
capacity of less than 65,000 Btu/h to a new appendix B to subpart F of 
part 431, such that the proposed appendix B would be consistent with 
the current test procedures at 10 CFR 431.96 (as applicable to the 
three-phase equipment addressed in this rulemaking) and would continue 
to reference ANSI/AHRI 210/240-2008 and ANSI/AHRI 1230-2010 and provide 
instructions for determining SEER and HSPF. 86 FR 70316, 70320-70321. 
DOE correspondingly proposed to update the existing incorporation by 
reference of ANSI/AHRI 210/240-2008 and ANSI/AHRI 1230-2010 at 10 CFR 
431.95 to apply it to appendix B. The proposed appendix B would also 
centralize the additional test provisions currently applicable under 10 
CFR 431.96, i.e., 10 CFR 431.96(c) through (f). Id. As proposed, the 
three-phase equipment addressed in this rulemaking would be required to 
be tested according to

[[Page 77303]]

appendix B until such time as compliance is required with amended 
energy conservation standards that rely on the SEER2 and HSPF2 metrics, 
should DOE adopt such standards. Id.
    Similarly, DOE proposed to amend the test procedures for 3-phase 
ACUACs and ACUHPs with cooling capacity of less than 65,000 Btu/h and 
3-phase VRF with cooling capacity of less than 65,000 Btu/h by adopting 
AHRI 210/240-2023 in a new appendix B1 to subpart F of part 431. Id. 
DOE proposed to adopt the updated version of AHRI Standard 210/240, 
i.e., AHRI 210/240-2023, including the SEER2 and HSPF2 metrics. As 
proposed, the three-phase equipment addressed in this rulemaking would 
not be required to be tested using the test procedure in proposed 
appendix B1 until such time as compliance is required with amended 
energy conservation standards that rely on the SEER2 and HSPF2 metrics, 
should DOE adopt such standards. Id.
    DOE did not receive any comments in response to the proposed 
organization of the test procedures. As discussed in the following 
sections of this final rule, DOE is adopting AHRI 210/240-2023, 
including the SEER2 and HSPF2 metrics. Accordingly, for the reasons 
discussed in the December 2021 NOPR and as discussed in the preceding 
paragraphs, DOE is finalizing the proposed organization of the test 
procedures by establishing appendices F and F1 \11\ for testing 3-phase 
ACUACs and ACUHPs with cooling capacity of less than 65,000 Btu/h and 
3-phase VRF with cooling capacity of less than 65,000 Btu/h.
---------------------------------------------------------------------------

    \11\ Although DOE proposed in the December 2021 NOPR to 
establish test procedures at appendices B and B1 for the three-phase 
equipment subject to this rulemaking, appendix B has since been 
established for direct-expansion dedicated outdoor air systems. 
Further, appendices C, D, and E have been designated for other 
categories of commercial air conditioning and heating equipment. As 
a result, in this final rule, DOE establishes appendices F and F1 
for the equipment that is the subject of this final rule.
---------------------------------------------------------------------------

C. Metrics

    As noted, for 3-phase ACUACs and ACUHPs with cooling capacity of 
less than 65,000 Btu/h and for 3-phase VRF with cooling capacity of 
less than 65,000 Btu/h, the cooling metric and heating metric currently 
specified by DOE are the SEER and HSPF metrics, respectively. 10 CFR 
431.96. As noted in the December 2021 NOPR, SEER is a seasonal 
efficiency metric that accounts for electricity consumption in active 
and standby cooling modes during the cooling season, while HSPF is a 
seasonal efficiency metric that accounts for electricity consumption in 
active and standby heating modes for heat pumps during the heating 
season. 86 FR 70316, 70320. These same metrics currently apply to 
single-phase CAC/HPs, including single-phase, air-cooled VRF multi-
split systems with a cooling capacity of less than 65,000 Btu/h (see 
appendix M). Id.
    As discussed in the December 2021 NOPR, SEER2 and HSPF2 are metrics 
established in the amended test procedure for single-phase CAC/HPs 
(appendix M1) and have the same definitions as their counterpart 
metrics in appendix M (i.e., SEER and HSPF) but reflect the amendments 
made to the test procedure in appendix M1, which change the measured 
efficiency values compared to appendix M. (See 82 FR 1426, 1437 (Jan. 
5, 2017) explaining DOE's decision to adopt the new metrics SEER2 and 
HSPF2.) Id. at 86 FR 70321.

D. Updates to Industry Standards and Proposed Test Procedures for 
Three-Phase Equipment With Cooling Capacity of Less Than 65,000 Btu/h

    As noted, the current DOE test procedure at 10 CFR 431.96 for 3-
phase ACUACs and ACUHPs with cooling capacity of less than 65,000 Btu/h 
incorporates by reference ANSI/AHRI 210/240-2008 with Addenda 1 and 2 
(i.e., ANSI/AHRI 210/240-2008, but omitting section 6.5). ANSI/AHRI 
210/240-2008 includes as appendix C (which is designated as normative 
in the industry test standard \12\) the entirety of the text of 
appendix M as amended by a final rule published on October 22, 2007 (72 
FR 59906). Appendix M provides the Federal test procedure for 
determining the efficiency of single-phase CAC/HPs with rated cooling 
capacities of less than 65,000 Btu/h, which are consumer products 
covered under 10 CFR part 430.
---------------------------------------------------------------------------

    \12\ The inclusion of appendix M in the normative appendix C of 
AHRI 210/240-2008 means that appendix M was required to be followed 
when testing in accordance with ANSI/AHRI 210/240-2008.
---------------------------------------------------------------------------

    The current DOE test procedure at 10 CFR 431.96 for 3-phase VRF 
with cooling capacity of less than 65,000 Btu/h incorporates by 
reference ANSI/AHRI 1230-2010 with Addendum 1 (i.e., ANSI/AHRI 1230-
2010, but omitting sections 5.1.2 and 6.6).
    As noted previously in this document, AHRI has published several 
updated industry standards: AHRI 210/240-2017 (published in December 
2017); AHRI 210/240-2017 with Addendum 1 (published in April 2019); 
AHRI 210/240-2023 (published in May 2020); and AHRI 1230-2021 
(published in May 2021).
    As discussed in the following sections, DOE is incorporating by 
reference AHRI 210/240-2023 as the test procedure for the three-phase 
equipment addressed in this final rule. DOE is also incorporating by 
reference ANSI/ASHRAE 37-2009, which is referenced by AHRI 210/240-
2023. Use of the amended test procedures incorporating AHRI 210/240-
2023 will not be required until such time as compliance is required 
with amended standards in terms of the new metrics, SEER2 and HSPF2, 
should DOE adopt such energy conservation standards. These amended test 
procedures align with the test procedure and metrics for CAC/HPs 
specified at appendix M1.
1. Harmonization With Single-Phase Products
    As discussed in the December 2021 NOPR, the three-phase equipment 
that is the subject of this final rule is often nearly identical to 
their single-phase counterparts. 86 FR 70316, 70322. Specifically, 
three-phase models generally are manufactured on the same production 
lines and are physically identical to their corresponding single-phase 
central air conditioner and central air conditioning heat pump models, 
except that the former have three-phase electrical systems and use 
components--primarily motors and compressors--that are designed for 
three-phase power input. Id. Other key operational components, such as 
heat exchangers and fans (excluding fan motors), are typically 
identical for three-phase and single-phase designs of a given model 
family. Id. In addition, most manufacturers' model numbers for single-
phase products and three-phase equipment are interchangeable, and 
three-phase and single-phase versions of the same model typically have 
the same energy efficiency ratings. See, e.g., 80 FR 42614, 42622 (July 
17, 2015) and 83 FR 49501, 49504.
    As discussed in the December 2021 NOPR, in response to the October 
2018 RFI, stakeholders supported harmonizing the test procedures for 3-
phase ACUACs and ACUHPs with cooling capacity of less than 65,000 Btu/h 
with the test procedures for single-phase CAC/HPs with a cooling 
capacity of less than 65,000 Btu/h.\13\ (CA IOUs, No. 2 at pp. 1-2; 
Ingersoll Rand, No. 3 at p. 2; AHRI, No. 4 at pp. 1-2; NRDC and ASAP, 
No. 5 at pp. 1-2; Lennox, No. 6 at pp. 1-2; Carrier, No. 7 at p. 1; 
Goodman, No. 8 at pp. 1-3). 86 FR 70316, 70322. In addition, several

[[Page 77304]]

stakeholders supported harmonizing with both appendix M and appendix M1 
or at a minimum, with appendix M1 (Carrier, No. 7 at p. 2; Goodman, No. 
8 at pp. 1-2; AHRI, No. 4 at p. 2; CA IOUs, No. 2 at p. 2; NRDC and 
ASAP, No. 5 at pp. 1-2; Lennox, No. 6 at p. 2). Id.
---------------------------------------------------------------------------

    \13\ All comments are available at www.regulations.gov, in 
Docket No. EERE-2017-BT-TP-0031.
---------------------------------------------------------------------------

    The following sections discuss DOE's consideration of harmonization 
with the relevant industry standards, including consideration of 
harmonization with appendices M and appendix M1.
2. AHRI 210/240-2017 and AHRI 210/240-2017 With Addendum 1
    In the December 2021 NOPR, DOE considered whether to harmonize the 
current test procedures for the three-phase equipment addressed in this 
document with appendix M by adopting AHRI 210/240-2017 and AHRI 210/
240-2017 with Addendum 1 for compliance prior to January 1, 2023. 86 FR 
70316, 70321-70324. However, DOE noted that the required 360-day 
compliance lead-time period for test procedure final rules for ASHRAE 
equipment specified in EPCA (42 U.S.C. 6314(d)(1)) would result in 
little to no time between the compliance date of the final rule for 
this test procedure rulemaking and January 1, 2023-when appendix M1 is 
required for testing CAC/HPs (and when appendix M will no longer be 
used). Id. at 86 FR 70322. Therefore, DOE tentatively concluded that 
there would be little practical benefit to harmonizing the test 
procedures for the three-phase equipment addressed in this final rule 
with the current test procedures for CAC/HPs at appendix M. Id. 
Furthermore, DOE identified errors in AHRI 210/240-2017 with Addendum 1 
that DOE tentatively determined would need to be corrected in 
regulatory text if DOE were to adopt AHRI 210/240-2017 with Addendum 1. 
Id. at 86 FR 70323. For these reasons, DOE tentatively concluded that 
adopting a revised test procedure (i.e., referencing AHRI 210/240-2017 
or AHRI 210/240-2017 with Addendum 1, along with the substantive 
corrections and deviations that would be required) for 3-phase ACUACs 
and ACUHPs with cooling capacity of less than 65,000 Btu/h would be 
unduly burdensome to manufacturers. Id. at 86 FR 70324. DOE considered 
these reasons to constitute clear and convincing evidence that adopting 
AHRI 210/240-2017 or AHRI 210/240-2017 with Addendum 1 would not meet 
the requirements specified in 42 U.S.C. 6314(a)(2). Id.
    As such, DOE proposed to maintain the current test procedure for 3-
phase ACUACs and ACUHPs with cooling capacity of less than 65,000 Btu/
h, which incorporates by reference ANSI/AHRI 210/240-2008, until such 
time as use of the amended test procedure referencing AHRI 210/240-2023 
would be required. Id. Several commenters supported the proposal to 
maintain reference to ANSI/AHRI 210/240-2008 with Addenda 1 and 2 as 
the Federal test procedure for 3-phase ACUACs and ACUHPs with cooling 
capacity of less than 65,000 Btu/h, until such time as use of the 
amended test procedure referencing AHRI 210/240-2023 would be required. 
(AHRI, No. 16 at p. 2; CA IOUs, No. 18 at pp. 1-2; Carrier, No. 15 at 
p. 2; Lennox, No.14 at p. 2; NYSERDA, No. 13 at pp. 1-2; Trane, No. 19 
at p. 1)
    However, CA IOUs commented that because ANSI/AHRI 210/240-2008 with 
Addenda 1 and 2 references ANSI/ASHRAE 37-2005 (while appendix M and 
ANSI/AHRI Standard 1230-2010 reference ANSI/ASHRAE 37-2009), there is a 
discrepancy in the treatment of 3-phase ACUAC and ACUHP versus VRF 
equipment under the proposed appendix B.\14\ (CA IOUs, No. 18 at p. 2) 
CA IOUs recommended that DOE consider adding an exception in section 1 
of appendix B, such that ANSI/AHRI Standard 210/240-2008 is required in 
conjunction with ANSI/ASHRAE 37-2009, thereby making the incorporation 
by reference fully consistent with the approaches taken for single-
speed products under appendix M and VRF equipment in ANSI/AHRI Standard 
1230-2010. (Id.)
---------------------------------------------------------------------------

    \14\ As noted, appendix B as proposed in the December 2021 NOPR 
corresponds to appendix F as finalized in this final rule.
---------------------------------------------------------------------------

    DOE acknowledges the concern raised by CA IOUs, but DOE notes that 
ANSI/AHRI 1230-2010 does not reference ANSI/ASHRAE 37-2009 as commented 
by CA IOUs (and erroneously mentioned by DOE in the December 2021 NOPR 
\15\), but instead references ANSI/ASHRAE 37-2005. Therefore, there is 
no discrepancy in the treatment of 3-phase ACUAC and ACUHP versus VRF 
equipment as proposed in appendix B in the December 2021 NOPR (and as 
adopted in appendix F in this final rule) because ANSI/AHRI 210/240-
2008 and ANSI/AHRI 1230-2010 both reference ANSI/ASHRAE 37-2005. 
Additionally, DOE notes that appendix F is intended to reflect the test 
procedure as it is prescribed in the Federal Register currently--and 
the current test procedure for 3-phase ACUACs and ACUHPs with cooling 
capacity of less than 65,000 Btu/h references ANSI/AHRI 210/240-2008, 
which in turn references ANSI/ASHRAE 37-2005. As such, referencing 
ANSI/ASHRAE 37-2009 in appendix F would lead to appendix F being 
incongruous with the current test procedure.
---------------------------------------------------------------------------

    \15\ In the December 2021 NOPR, DOE mistakenly stated that ANSI/
AHRI 1230-2010 references ANSI/ASHRAE 37-2009. 86 FR 70316, 70325-
70326. This oversight did not impact any of the DOE analysis 
conducted in the December 2021 NOPR.
---------------------------------------------------------------------------

    As a result, DOE is maintaining the reference to ANSI/AHRI 210/240-
2008 with Addenda 1 and 2 as the Federal test procedure for 3-phase 
ACUACs and ACUHPs with cooling capacity of less than 65,000 Btu/h in 
appendix F without an exception related to the version of ANSI/ASHRAE 
37. DOE is also updating the existing incorporation by reference of 
ANSI/AHRI 210/240-2008 at 10 CFR 431.95 to apply to appendix F. As 
stated previously in this document, appendix F will serve as the 
Federal test procedure until such time as use of the amended test 
procedure referencing AHRI 210/240-2023, appendix F1, is required as 
discussed in the following section.
3. AHRI 210/240-2023
    In the December 2021 NOPR, DOE noted that AHRI 210/240-2023 
generally corrects the errors in AHRI 210/240-2017 with Addendum 1 and 
harmonizes with the updated Federal test method for single-phase CAC/
HPs with rated cooling capacities of less than 65,000 Btu/h (i.e., 
appendix M1, required for use beginning January 1, 2023), which 
includes single-phase, air-cooled, VRF multi-split systems with a 
cooling capacity of less than 65,000 Btu/h. 86 FR 70316, 70324. 
Additionally, DOE noted that the updates contained in AHRI 210/240-2023 
provide for measuring energy efficiency using the SEER2 and HSPF2 
metrics, which are the metrics adopted by ASHRAE Standard 90.1-2019 for 
the 3-phase ACUACs and ACUHPs with cooling capacity of less than 65,000 
Btu/h standards beginning January 1, 2023.\16\ Id. In response to this 
update to AHRI 210/240, DOE proposed to incorporate AHRI 210/240-2023 
as the test procedure with which representations must be made beginning 
with the compliance date of any amended DOE standards for three-phase 
equipment relying on SEER2 and HSPF2 as the metrics.\17\ Id.
---------------------------------------------------------------------------

    \16\ ASHRAE 90.1-2019 did not update the metrics for 3-phase VRF 
with cooling capacity of less than 65,000 Btu/h. Those metrics 
remain SEER and HSPF in ASHRAE Standard 90.1.
    \17\ The timing and implementation of any amended standards may 
be different for 3-phase ACUACs and ACUHPs with cooling capacity of 
less than 65,000 Btu/h and for 3-phase VRF with cooling capacity of 
less than 65,000 Btu/h, depending on DOE rulemakings related to 
energy conservation standards for those separate categories of 
equipment.

---------------------------------------------------------------------------

[[Page 77305]]

    In the December 2021 NOPR, DOE sought comment on its proposal to 
incorporate by reference AHRI 210/240-2023 in the DOE test procedures 
for 3-phase ACUACs and ACUHPs with cooling capacity of less than 65,000 
Btu/h and 3-phase VRF with cooling capacity of less than 65,000 Btu/h. 
Id. at 86 FR 70325. DOE also sought comment on its proposal to require 
compliance with these test procedures on the compliance date of any 
amended energy conservation standards that DOE may adopt later as part 
of a future rulemaking. Id.
    Commenters generally supported the proposal to incorporate by 
reference AHRI 210/240-2023 in the DOE test procedures for 3-phase 
ACUACs and ACUHPs with cooling capacity of less than 65,000 Btu/h and 
3-phase VRF with cooling capacity of less than 65,000 Btu/h, with a 
compliance date aligning with the compliance date of any amended DOE 
standards for three-phase equipment relying on SEER2 and HSPF2 as the 
metrics. (AHRI, No. 16 at pp. 2-3; Carrier, No. 15 at pp. 2-3; Lennox, 
No. 14 at p. 2; NEEA, No. 20 at p. 1; NYSERDA, No. 13 at pp. 1-2; 
Trane, No. 19 at p. 1)
    In summary, for the reasons discussed in the December 2021 NOPR and 
in this document, DOE is incorporating by reference AHRI 210/240-2023 
in the DOE test procedures for 3-phase ACUACs and ACUHPs with cooling 
capacity of less than 65,000 Btu/h and 3-phase VRF with cooling 
capacity of less than 65,000 Btu/h, with the amended test procedures 
required for use beginning on the compliance date of any amended energy 
conservation standards. Specifically, in appendix F1, DOE is 
referencing AHRI 210/240-2023 except for the following sections:

Section 6--Rating Requirements (these provisions are not related to the 
method of test, and DOE separately addresses these topics in 10 CFR 
part 429);
Sections 6.1.8, 6.4.1, 6.4.2, 6.4.3, and 6.4.4 (minimum testing and 
certification requirements);
Sections 6.2 and 6.4.6 (permits a given product to have multiple 
ratings of different values);
Section 6.5 (uncertainty allowances for testing, which are not relevant 
to the Federal test procedure);
Sections 7 through 10, Appendix C, and Appendix I (relevant only to 
AHRI's certification program);
Appendix F: Sections F15.2 and F17 (pertains to electrical measurements 
and cyclic tolerances, respectively; DOE proposed modifications as 
discussed in the December 2021 NOPR. 86 FR 70316, 70324-70325);
Appendix G (pertains to the exclusion of certain optional features for 
testing, as discussed in the subsequent subsection); and
Appendix H (pertains to off-mode testing, which is not required by DOE 
for three-phase equipment).
a. Appendix G of AHRI 210/240-2023
    In Appendix G of AHRI 210/240-2023, AHRI included a list of 
components that must be present for testing (Section G1.2) and a list 
of features that are optional for testing (Section G2), which provides 
additional instruction to address certain of these features and 
additional details that are beyond the scope of the current Commercial 
HVAC Enforcement Policy.\18\ Also, there are five features \19\ that 
are included in the Commercial HVAC Enforcement Policy for 3-phase 
ACUACs and ACUHPs with cooling capacity of less than 65,000 Btu/h that 
are not included in Section G2 of AHRI 210/240-2023. Currently, 
enforcement testing of 3-phase ACUACs and ACUHPs with cooling capacity 
of less than 65,000 Btu/h and 3-phase VRF with cooling capacity of less 
than 65,000 Btu/h falls under DOE's Commercial HVAC Enforcement Policy, 
which outlines how certain features of this equipment will be treated 
for compliance testing.
---------------------------------------------------------------------------

    \18\ The enforcement policy for commercial HVAC equipment can be 
found at www.energy.gov/gc/downloads/commercial-equipment-testing-enforcement-policies.
    \19\ These five features are high-static indoor blower or 
oversized motor; desuperheaters; outdoor fan with Variable Frequency 
Drive (``VFD''); indoor fan with VFD; and compressor with VFD.
---------------------------------------------------------------------------

    In the December 2021 NOPR, DOE found that certain optional features 
listed in Section G2 (as well as certain features that are included in 
DOE's current Commercial HVAC Enforcement Policy but not included in 
Section G2 of AHRI 210/240-2023) are present in models of 3-phase 
ACUACs and ACUHPs with cooling capacity of less than 65,000 Btu/h. 86 
FR 70316, 70325. However, DOE found that these same features are also 
present in models of single-phase CAC/HPs with cooling capacity of less 
than 65,000 Btu/h. Id. DOE's Commercial HVAC Enforcement Policy does 
not apply to single-phase products and appendices M and M1 do not 
include any special treatment for these optional features within the 
test procedure. In addition, DOE has not received any waivers related 
to these features and DOE does not have technical justification to 
support differential treatment of such features for three-phase 
equipment as compared to single-phase products. As such, DOE 
tentatively determined that any of these features present in 3-phase 
ACUACs and ACUHPs with cooling capacity of less than 65,000 Btu/h can 
also be tested in accordance with the proposed test procedure and that, 
to maintain harmonization with single-phase products, it was not 
necessary to adopt Appendix G of AHRI 210/240-2023 in the proposed test 
procedure. Id. DOE further noted that if DOE adopted an amended test 
procedure for three-phase equipment that does not reference Appendix G, 
DOE would rescind the Commercial HVAC Enforcement Policy to the extent 
that it is applicable to 3-phase ACUACs and ACUHPs with cooling 
capacity of less than 65,000 Btu/h and 3-phase VRF with cooling 
capacity of less than 65,000 Btu/h. Id.
    AHRI, Carrier, and Trane disagreed with DOE's tentative proposal to 
not adopt Appendix G of the AHRI 210/240-2023 standard, which outlines 
how certain features of this 3-phase equipment will be treated for 
compliance testing. (AHRI, No. 16 at p. 3; Carrier, No. 15 at pp. 2-3; 
Trane, No. 19 at p. 1) AHRI stated that not all three-phase equipment 
models are based on a single-phase platform and that even those that 
are face different codes and standards requirements than residential 
products. (AHRI, No. 16 at p. 3) AHRI and Carrier asserted that DOE's 
tentative determination that single-phase products sold in the market 
include some of the features included in Appendix G is insufficient 
justification to not adopt Appendix G for three-phase equipment. (AHRI, 
No. 16 at p. 3; Carrier, No. 15 at p. 2) AHRI and Carrier further 
commented that DOE did not clarify which single-phase product features 
DOE analyzed to conclude that there was no technical justification to 
support differential treatment of such features for three-phase 
equipment as compared to single-phase products. (AHRI, No. 16 at p. 3; 
Carrier, No. 15 at p. 2) AHRI and Carrier added that there was 
technical justification for testing exemptions outlined in Appendix G, 
such as three-phase power, which is exclusive to commercial buildings. 
Id. AHRI and Carrier further noted that building codes have exclusive 
requirements for commercial buildings, which create technical 
differences between three-phase models and their single-phase 
counterparts, as evidenced by California's energy code, Title 24-2022, 
which requires economizers on units down to 33,000 Btu/hr. (AHRI, No. 
16 at p. 3; Carrier, No. 15 at pp. 2-3) AHRI and Carrier also commented 
that an appendix for ASHRAE Standard 90.1 is considering similar 
requirements for

[[Page 77306]]

economizers on units down to 33,000 Btu/h. Id. AHRI and Carrier further 
commented that without the Commercial HVAC Enforcement Policy or 
Appendix G, manufacturers would not be able to factory install 
economizers. Id. In conclusion, AHRI, Carrier, and Trane recommended 
that DOE adopt Appendix G from AHRI 210/240-2023 as part of the test 
procedures to continue to permit the necessary flexibility for 
components. (AHRI, No. 16 at p. 3; Carrier, No. 15 at p. 3; Trane, No. 
19 at p. 1)
    In this final rule, DOE is adopting AHRI 210/240-2023 without 
Appendix G in its test procedures for the three-phase equipment subject 
to this final rule to align the test procedures for single-phase 
products and three-phase equipment. As discussed in the December 2021 
NOPR, DOE has not identified any optional components specified in 
Appendix G that are included in three-phase equipment but not single-
phase products. Therefore, while certain optional components (e.g., 
economizers, as suggested by AHRI and Carrier) are offered as part of 
certain models of three-phase equipment, such components are also 
offered as part of certain models of single-phase products. DOE's test 
procedure for CAC/HPs does not include provisions excluding Appendix G 
components, such as economizers, and, as discussed, DOE has not 
received petitions for waivers with regard to testing CAC/HPs with such 
components.
    Further, the commenters did not provide any justification for a 
testing exemption for the Appendix G components in three-phase 
equipment but not single-phase products--i.e., commenters did not 
provide any information to suggest that testing a three-phase unit with 
a specific Appendix G component would present any complications that 
would not exist when testing an otherwise identical single-phase unit 
with the same Appendix G component.
    While the vast majority of three-phase equipment on the market are 
otherwise identical to single-phase models, DOE acknowledges that there 
are a number of three-phase equipment model lines without a single-
phase counterpart. However, per AHRI 210/240-2023, there is no 
difference in testing three-phase equipment with single-phase 
counterparts as compared to testing three-phase equipment without 
single-phase counterparts. Additionally, the commenters did not provide 
any justification as to why three-phase equipment without single-phase 
counterparts would warrant different treatment with regard to Appendix 
G components.
    With regard to AHRI and Carrier's assertions that certain Appendix 
G components (such as economizers) may be installed more commonly in 
three-phase equipment than single-phase products (particularly because 
certain commercial building codes may require use of specific Appendix 
G components, such as economizers), the prevalence of the component in 
shipments of three-phase equipment is not a relevant consideration for 
whether test procedure provisions are warranted to exclude the 
component from testing. Regardless of whether Appendix G components are 
included more commonly in three-phase equipment than single-phase 
products, DOE has concluded that they are included in both three-phase 
equipment and single-phase products. DOE notes that commenters did not 
provide any information to suggest that any of the components specified 
in Appendix G are included in three-phase equipment but not single-
phase products.
    Additionally, DOE disagrees with the commenter's assertions that 
the use of three-phase power in commercial buildings provides a 
technical justification for exemption of Appendix G components. If 
building codes require certain Appendix G components for three-phase 
equipment, this requirement may increase the fraction of shipments of 
three-phase equipment with those components relative to single-phase 
products, but it does provide any technical justification for exempting 
the component from testing, given that the components are also included 
in single-phase products, albeit in a potentially lower fraction of 
shipments.
    DOE disagrees with AHRI and Carrier's assertion that Appendix G 
would be necessary for manufacturers to be able to factory install 
economizers. DOE notes that manufacturers are able to factory install 
economizers in single-phase products even though there is no exemption 
of Appendix G components for testing such products, and the same will 
be true without any allowance for exempted components for three-phase 
equipment. DOE reiterates that, in this final rule, DOE is harmonizing 
the test procedures for three-phase equipment with that for single-
phase products, and that commenters have not provided justification 
needed to support the assertion that three-phase equipment warrants 
exemption of components when those components are also included in 
single-phase products.
    As such, DOE has determined that models of 3-phase ACUACs and 
ACUHPs with cooling capacity of less than 65,000 Btu/h that include 
components specified in Appendix G can be tested in accordance with the 
test procedure adopted in this final rule. To harmonize with the test 
procedure for single-phase products, DOE is not adopting Appendix G of 
AHRI 210/240-2023 as part of the amended test procedure adopted in this 
final rule. While no models of 3-phase VRF with cooling capacity of 
less than 65,000 Btu/h are currently on the market, DOE expects that if 
those models are on the market the same determination would apply for 
the same reasons. In conjunction with this final rule, DOE is 
rescinding the Commercial HVAC Enforcement Policy to the extent that it 
is applicable to 3-phase ACUACs and ACUHPs with cooling capacity of 
less than 65,000 Btu/h and 3-phase VRF with cooling capacity of less 
than 65,000 Btu/h.
4. AHRI 1230
    As discussed previously, AHRI 1230-2021 excludes from its scope 3-
phase VRF with cooling capacity of less than 65,000 Btu/h. Therefore, 
in this final rule, DOE is not adopting AHRI 1230-2021 because by its 
explicit terms AHRI 1230-2021 is not applicable to the equipment 
considered in this final rule.
    As discussed previously in section III.D.2.b of this final rule, 
DOE is incorporating by reference AHRI 210/240-2023 for testing 3-phase 
VRF with cooling capacity less than 65,000 Btu/h. The current Federal 
test procedure for this equipment, now codified at appendix F, which 
references ANSI/AHRI 1230-2010, remains the required test procedure 
until such time as DOE adopts amended energy conservation standards for 
this equipment.
5. ASHRAE 37
    As discussed in the December 2021 NOPR, ANSI/ASHRAE Standard 37, 
which provides a method of test for many categories of air conditioning 
and heating equipment, is referenced for testing by all versions of 
AHRI Standards 210/240 and 1230. 86 FR 70316, 70325. Appendix E of AHRI 
210/240-2023 provides additional instruction and exceptions regarding 
the application of the test methods specified in ANSI/ASHRAE 37-2009. 
And ANSI/ASHRAE 37-2005 is referenced in ANSI/AHRI 1230-2010, which is 
currently the referenced industry test standard in the DOE test 
procedure for VRF multi-split systems. ANSI/ASHRAE 37-2005 is also 
referenced by ANSI/AHRI 210/240-2008, which is currently the referenced 
industry test standard in the DOE test procedure for

[[Page 77307]]

3-phase ACUACs and ACUHPs with cooling capacity of less than 65,000 
Btu/h. Id.
    As such, given the use of ANSI/ASHRAE 37-2009 when testing 
according to AHRI 210/240-2023, DOE is directly referencing ANSI/ASHRAE 
37-2009 in its test procedures for 3-phase ACUACs and ACUHPs with 
cooling capacity of less than 65,000 Btu/h and 3-phase VRF with cooling 
capacity of less than 65,000 Btu/h. Specifically, in appendix F1, DOE 
is referencing the applicable sections of ANSI/ASHRAE 37-2009--i.e., 
all sections except Sections 1, 2, and 4.\20\
---------------------------------------------------------------------------

    \20\ DOE is excluding references to Section 1 (``Purpose''), 
Section 2 (``Scope''), and Section 4 (``Classifications'') in ANSI/
ASHRAE 37-2009 to avoid any potentially contradictory requirements 
with DOE regulations.
---------------------------------------------------------------------------

    As noted in section III.B of this final rule, appendix F references 
AHRI 210/240-2008 (which in turn references ANSI/ASHRAE 37-2005) for 3-
phase ACUACs and ACUHPs with cooling capacity of less than 65,000 Btu/h 
and references AHRI 1230-2010 (which in turn references ANSI/ASHRAE 37-
2005) for 3-phase VRF with cooling capacity of less than 65,000 Btu/h. 
As discussed, appendix F is meant only as a new location for the 
current test procedures and, as a result, DOE is not changing the 
embedded references to ANSI/ASHRAE 37.

E. Certification, Compliance, and Enforcement Requirements

    In the December 2021 NOPR, DOE proposed amendments to the basic 
model definition and product-specific enforcement provisions for the 
three-phase equipment specified at 10 CFR 431.92 and 10 CFR 429.134, 
respectively, to align with the provisions for single-phase products. 
86 FR 70316, 70326. Comments received on DOE's proposals are discussed 
in the following subsections.
1. Representation Requirements
    In the December 2021 NOPR, DOE proposed that the representation and 
certification requirements for the three-phase equipment subject to 
this rulemaking would be included in a new section at 10 CFR 429.64 
\21\ and excluded from the scope of 10 CFR 429.43. Id. DOE also 
proposed to establish a new section 10 CFR 429.70(i) \22\ for 
alternative energy determination method (``AEDM'') requirements that 
would apply to the three-phase equipment addressed in this rulemaking. 
Id.
---------------------------------------------------------------------------

    \21\ The provisions proposed in the December 2021 NOPR at 10 CFR 
429.64 are being finalized at 10 CFR 429.67 in this final rule as 10 
CFR 429.64 has since been established for electric motors.
    \22\ The provisions proposed in the December 2021 NOPR at 10 CFR 
429.70(i) are being finalized at 10 CFR 429.70(l) in this final rule 
as 10 CFR 429.70(i) has since been established for consumer furnaces 
and consumer boilers.
---------------------------------------------------------------------------

a. Use of Single-Phase AEDM for Rating Three-Phase Equipment
    Through its newly proposed provisions in 10 CFR 429.64 and 
420.70(i), DOE intended to mirror the representation requirements 
applicable to CAC/HPs in 10 CFR 429.16 and 429.70(e), except for the 
minimum testing requirements and certain AEDM validation requirements 
for each basic model of single-package units and single-split systems. 
Id. DOE tentatively determined that an AEDM validated pursuant to 10 
CFR 429.70(e) would also be appropriate for rating basic models of 
three-phase, less than 65,000 Btu/h single-package units and single 
split-systems that have otherwise identical single-phase counterparts. 
Id. at 86 FR 70327. As such, for three-phase, less than 65,000 Btu/h 
single-package units and single-split systems, DOE proposed in 10 CFR 
429.70(i)(2) to permit a manufacturer to rely on an AEDM for CAC/HPs 
that is validated in accordance with 10 CFR 429.70(e)(2) with testing 
of otherwise identical single-phase counterparts, without additional 
validation testing.\23\ Id. DOE noted that if a manufacturer offers 
three-phase models that do not have otherwise identical single-phase 
counterparts, or the manufacturer has not validated an AEDM in 
accordance with 10 CFR 429.70(e)(2) with testing of the otherwise 
identical single-phase counterparts, the manufacturer would be required 
to test a single unit sample for each of two basic models to validate 
an AEDM, consistent with the existing requirements for all capacities 
of three-phase equipment. Id.
---------------------------------------------------------------------------

    \23\ DOE proposed that while the AEDM would not need additional 
validation testing, it would need to reflect the slight difference 
in performance between single-phase and three-phase components. 86 
FR 7016, 70327.
---------------------------------------------------------------------------

    In conjunction with this proposal, DOE proposed also to specify in 
the newly proposed 10 CFR 429.70(i)(3) that ``otherwise identical'' 
means differing only in the phase of the electrical system and the 
phase of power input for which the motors and compressors are designed. 
Id.
    DOE requested comment on the proposal to permit, for three-phase, 
less than 65,000 Btu/h single-package and single-split system basic 
models with otherwise identical single-phase counterparts, the use of 
ratings based on an AEDM validated using the test results from an 
otherwise identical CAC/HPs, rather than requiring validation using the 
test results with testing of three-phase models. Id. DOE further 
requested comment on its proposed specification of the term ``otherwise 
identical'' and whether the proposed AEDM requirements should include a 
provision to validate the correlation between single-phase and three-
phase performance as determined using an AEDM. Id.
    AHRI, Carrier, and Lennox expressed general support for DOE's 
proposals related to the representation requirements. (AHRI, No. 16 at 
p. 4; Carrier, No. 15 at p. 4; Lennox, No. 14 at p. 3) However, AHRI, 
Carrier, and Lennox recommended a modification regarding the term 
``otherwise identical''--specifically recommending that, in addition to 
allowing AEDM use between similar single and three-phase equipment, DOE 
should also allow similar three-phase designs of different voltages to 
use AEDM data from an otherwise identical single-phase product, 
asserting that the performance differences between different voltages 
are similarly well known. Id. Lennox elaborated that while residential 
central air conditioners and heat pumps typically use 230V single-phase 
power sources, commercial three-phase equipment can use 230V, 460V, and 
575V three-phase power sources. (Lennox, No. 14 at p. 3)
    DOE acknowledges that three-phase equipment is often installed with 
voltages that are higher than the voltage typically used for their 
single-phase counterparts. Further, DOE has determined that, comparable 
to the differences between single- and three-phase power, the slight 
performance differences between models designed for use with multiple 
voltages (e.g., minor differences in compressor performance depending 
on the supply voltage of the compressor motor; or minor differences 
from transformer losses if a transformer is used in the unit to change 
the voltage) are well understood and can be accounted for within an 
AEDM. Therefore, DOE considers the clarification suggested by AHRI, 
Carrier, and Lennox to be appropriate and is updating ``otherwise 
identical'' to mean differing only in the phase or voltage [emphasis 
added] of the electrical system and the phase or voltage [emphasis 
added] of power input for which the motors and compressors are 
designed.
    Regarding the provision to validate the correlation between single-
phase and three-phase performance, Carrier and Lennox agreed that this 
validation was not necessary. (Carrier, No. 15 at p. 4; Lennox, No. 14 
at p. 3) Carrier commented that system validation

[[Page 77308]]

would increase test burden without providing a benefit and that an 
otherwise identical three-phase model generally outperforms the single-
phase counterpart. (Carrier, No. 15 at p. 4) Lennox commented that the 
performance characteristics of single-phase and three-phase components 
are well known and already incorporated into manufacturer AEDMs and 
that further validation of the correlation between single-phase and 
three-phase performance is not needed. (Lennox, No. 14 at p. 3)
    Conversely, CA IOUs and Joint Advocates expressed support for 
requiring some form of validation to correlate the performance between 
single-phase and three-phase performance as determined using an AEDM. 
(CA IOUs, No. 18 at p. 2; Joint Advocates, No. 17 at p. 2) CA IOUs 
recommended that DOE optionally allow manufacturers to submit 
supplemental information to DOE with the intent of demonstrating the 
efficiency increase via correlation data for three-phase basic models 
relative to their single-phase counterpart basic models. (CA IOUs, No. 
18 at p. 2) Joint Advocates supported validating an AEDM based on the 
tested performance of a three-phase basic model and commented that it 
was their understanding that this validation would not be equivalent to 
developing and validating a new AEDM. Alternatively, Joint Advocates 
suggested that DOE could perform a crosswalk to develop ratings for 
three-phase equipment based on the output of a validated AEDM for 
otherwise identical single-phase equipment. (Joint Advocates, No. 17 at 
p. 2)
    As noted in the December 2021 NOPR and as indicated by Lennox's 
comment, slight differences in performance between single-phase and 
three-phase models (e.g., minor differences in compressor performance 
depending on the electrical phase of the compressor motor) are well 
understood and can be accounted for within an AEDM (e.g., slightly 
different compressor coefficients used to model performance for single-
phase vs. three-phase compressors), rather than requiring testing of 
three-phase models. 86 FR 70316, 70327; (Lennox, No. 14 at p. 3) 
Further, for other categories of commercial package air conditioning 
and heating equipment, DOE allows an AEDM to be used to develop ratings 
for all equipment within a validation class, which encompasses all 
models in an equipment category with a given heat rejection medium 
(e.g., a single AEDM can be used to develop ratings for all basic 
models of air-cooled CUACs with cooling capacity greater than 65,000 
Btu/h offered by a manufacturer). 10 CFR 429.70(c)(2)(iv) Therefore, 
for other equipment categories, current DOE regulations allow use of an 
AEDM to cover both single and three-phase equipment without a need for 
additional validation of the performance differences between single and 
three-phase equipment. DOE has concluded that such a validation 
requirement for the three-phase equipment subject to this rulemaking 
would not be needed to develop representative ratings and would impose 
unnecessary certification burden on manufacturers. Therefore, DOE is 
not requiring that manufacturers validate the correlation between 
single-phase and three-phase performance as determined using an AEDM.
    DOE is adopting the AEDM provisions as proposed in the December 
2021 NOPR. Specifically, at 10 CFR 429.70(l)(2) \24\, DOE is permitting 
a manufacturer to rely on an AEDM for CAC/HPs that is validated in 
accordance with 10 CFR 429.70(e)(2) with testing of otherwise identical 
single-phase counterparts, without additional validation testing.
---------------------------------------------------------------------------

    \24\ As noted, 10 CFR 429.70(i) as proposed in the December 2021 
NOPR corresponds to 10 CFR 429.70(l) as finalized in this final 
rule.
---------------------------------------------------------------------------

b. Use of AEDM for Certain Configurations of Three-Phase Equipment
    As part of the harmonization with single-phase requirements, the 
proposal in 10 CFR 429.64, as presented in the December 2021 NOPR, 
required that all representations for outdoor units with no match and 
for multi-split systems, multi-circuit systems, and multi-head mini-
split systems must be determined through testing or other specified 
means, rather than through an AEDM. 86 FR 70316, 70327. As currently 
specified, the requirements at 10 CFR 429.16(c)(2)-(3) do not permit 
AEDMs for single-phase products with these configurations; as such, 
there would not be any extensively validated AEDMs available for 
products and equipment with these configurations. DOE noted that it is 
not aware of any three-phase models on the market with these 
configurations (i.e., outdoor units with no match or multi-split, 
multi-circuit, and multi-head mini-split systems), and, therefore, DOE 
tentatively concluded that this proposal would not result in increased 
testing burden or costs for any manufacturer. Id. In the December 2021 
NOPR, DOE requested comment on the existence of three-phase, less than 
65,000 Btu/h models of outdoor units with no match or multi-split, 
multi-circuit, and multi-head mini-split systems on the market. Id.
    Carrier commented that it was not aware if the referenced models 
exist in the market today. (Carrier, No. 15 at p. 4) Joint Advocates 
expressed support for prohibiting the use of AEDMs for three-phase 
outdoor units with no match, multi-split, multi-circuit, and multi-head 
mini-split systems to align with the single-phase requirements. (Joint 
Advocates, No. 17, at p. 1) Lennox recommended that DOE implement the 
same requirements for the three-phase outdoor units with no match 
considered under DOE's proposal as apply for single-phase products per 
10 CFR 429.16, including the provisions at 10 CFR 429.16(c)(2)-(3), 
which do not permit AEDM use. Lennox added that to ensure consistency 
and a level playing field between comparable products, the specific 
provisions for an outdoor unit with no match as outlined at 10 CFR 
429.16(a)(1) and further test requirements at 10 CFR 429.16(b)(2)(i) 
should apply to the three-phase equipment. (Lennox, No. 14 at p. 4) 
AHRI recommended permitting AEDMs to rate any three-phase, less than 
65,000 Btu/h models of outdoor units with no match or multi-split, 
multi-circuit, and multi-head mini-split systems on the market and 
aligning requirements with single-phase products. (AHRI, No. 16 at p. 
5)
    DOE notes that it is uncertain as to whether or not AHRI supported 
this proposal to not permit AEDM for the aforementioned configurations. 
AHRI expressed support for aligning the requirements for three-phase 
equipment with those for single-phase products--but contradictorily 
recommended permitting the use of AEDM for such configurations, which, 
if implemented, would lead to a misalignment between the treatment of 
three-phase and single-phase products.
    No commenters identified any models on the market of outdoor units 
with no match and multi-split, multi-circuit, and multi-head mini-split 
systems. Therefore, DOE concludes that the proposed AEDM provisions 
that do not allow use of an AEDM for outdoor units with no match and 
multi-split, multi-circuit, and multi-head mini-split systems would not 
impose any burden on manufacturers. As such, DOE is adopting the 
provisions related to outdoor units with no match and multi-split, 
multi-circuit, and multi-head mini-split systems as proposed in the 
December 2021 NOPR.

[[Page 77309]]

c. Coil-only Ratings for Single-Split-System Air Conditioners
    As DOE noted in the December 2021 NOPR, the proposal in 10 CFR 
429.64 also required every individual combination of single-split-
system air conditioner equipped with a single-stage or two-stage 
compressor distributed in commerce to be rated as a coil-only 
combination, with additional blower-coil representations allowed as 
applicable. 86 FR 70316, 70327. And as discussed in the December 2021 
NOPR, the three-phase equipment category may include models that are 
part of a line of commercial three-phase equipment that includes 
equipment below DOE's 65,000 Btu/h capacity boundary (rather than 
models that are otherwise identical to single-phase central air 
conditioners). Id. DOE noted that, based on the review of models 
certified in DOE's Compliance Certification Database, DOE expected 
almost all of these models to be packaged units, which are not impacted 
by the proposal in the December 2021 NOPR. Id.
    In the December 2021 NOPR, DOE requested comment on whether there 
are models of three-phase, single-split-system air conditioners with 
single-stage or two-stage compressors that are not distributed in 
commerce as a coil-only combination (i.e., distributed in commerce only 
as blower-coil combination(s)). Id.
    Carrier commented that it is not aware if the referenced models 
exist in the market today, while Lennox stated it was not aware of 
three-phase split system air conditioners with single-stage or two-
stage compressors that are not distributed in commerce with coil-only 
combinations (i.e., that are distributed in commerce only as blower-
coil combinations). (Carrier, No. 15 at p. 5; Lennox, No. 14 at p. 4)
    Joint Advocates supported DOE's proposal requiring that every 
individual combination distributed in commerce must be rated as a coil-
only combination. (Joint Advocates, No. 17, at p. 1) Lennox recommended 
that DOE align the representation requirements of three-phase equipment 
with similar single-phase products as outlined at 10 CFR 429.16(a)(1), 
so that all single- and two-stage air conditioners must have a coil-
only match representative of the least efficient combination. (Lennox, 
No. 14 at p. 4)
    AHRI commented that it is not aware of any three-phase, two-stage 
systems distributed in commerce as coil-only combinations, further 
commenting that three-phase products are most often used in small 
commercial applications and churches and are provided in matched 
combinations, and in the event that there are systems not provided as 
matched combinations, any three-phase requirements should be aligned 
with single-phase requirements. (AHRI, No. 16 at p. 5)
    Based on AHRI's comment, DOE is uncertain which representation 
requirements AHRI recommends that DOE adopt for three-phase equipment. 
AHRI's comment suggests that all three-phase, single-split-system air 
conditioners with two-stage compressors are distributed in commerce 
only as matched combinations (i.e., blower-coil systems). This 
contradicts Lennox's comment that it was not aware of three-phase split 
system air conditioners with single-stage or two-stage compressors that 
are distributed in commerce only as blower-coil combinations.
    DOE's representation requirements for single-phase products require 
that every individual combination distributed in commerce of single-
split-system air conditioner equipped with a single-stage or two-stage 
compressor has to be rated as a coil-only combination, with additional 
blower-coil representations allowed as applicable. See 10 CFR 
429.16(a)(1). Therefore, the SEER2 standards for single-phase single-
split-system air conditioners adopted in a direct final rule published 
on January 6, 2017 (82 FR 1786) are based on coil-only representations. 
Coil-only ratings are generally lower than blower-coil ratings because 
the default fan power coefficient and default fan heat coefficient 
specified in the test procedure for rating coil-only systems are 
generally more power-consuming than integral fans in blower-coil 
systems (see section III.D.3.a of this final rule for further 
discussion of default fan power and fan heat coefficients for coil-only 
systems). As such, if DOE were to allow blower-coil ratings for rating 
three-phase single-split-system air conditioners and DOE were to adopt 
the SEER2 standards for three-phase split system air conditioners 
proposed in the ECS NOPR (which align with the SEER2 standards 
specified for single-phase products at 10 CFR 430.32(c)(5)), the SEER2 
standards for three-phase split system air conditioners would 
effectively be less stringent than the standards for the single-phase 
counterparts, despite the standard values being equivalent.
    Given Lennox's comment suggesting that there are no three-phase 
split system air conditioners with single-stage or two-stage 
compressors that are distributed in commerce only as blower-coil 
combinations, the specific support for the proposals expressed by 
Lennox and Joint Advocates, the absence of any specific alternate 
approaches included in AHRI's comment, and the broad general support 
for harmonization between three-phase equipment and single-phase 
products as discussed in section III.D.1, in this final rule, DOE is 
adopting the provisions related to three-phase single-split-system air 
conditioners with single-stage or two-stage compressors as proposed in 
the December 2021 NOPR.
    Additionally, DOE is also clarifying the proposed language in the 
table at 10 CFR 429.67(b)(1) \25\ to state that, for single-split 
system air conditioners with single- or two-stage compressors, each 
model of outdoor unit must include a represented value for at least one 
coil-only individual combination that is distributed in commerce and 
which is representative of the least efficient combination distributed 
in commerce with that particular model of outdoor unit. For that 
particular model of outdoor unit, additional represented values for 
coil-only and blower-coil individual combinations are allowed, if 
distributed in commerce. This clarification to the provisions proposed 
in the December 2021 NOPR harmonizes with the provisions adopted in 10 
CFR 429.16(a)(1) for CACP/HPs in a final rule published on October 26, 
2022. 87 FR 64550.
---------------------------------------------------------------------------

    \25\ As noted, 10 CFR 429.64 as proposed in the December 2021 
NOPR corresponds to 10 CFR 429.67 as finalized in this final rule.
---------------------------------------------------------------------------

2. Basic Model Definition
    The current definition of ``basic model'' for three-phase equipment 
in 10 CFR 431.92 refers to all units manufactured by one manufacturer 
within a single equipment class, having the same or comparably 
performing compressor(s), heat exchangers, and air moving system(s) 
that have a common `nominal' cooling capacity. See 10 CFR 
431.92(2).\26\ The definition of ``basic model'' for single-phase 
products in 10 CFR 430.2 provides additional specifications on this 
same concept. See 10 CFR 430.2 (defining the term ``basic model'' and 
detailing the application of this term to different configurations of 
central air conditioners and central air conditioner heat pumps). For 
example, for split systems manufactured by outdoor unit manufacturers, 
a basic model includes all individual combinations having the same 
model of outdoor unit but with percentage variation limits on 
compressor, outdoor coil, and outdoor fan characteristics. Id.
---------------------------------------------------------------------------

    \26\ The definition applicable to variable refrigerant flow 
systems is different in wording but similar in content. See 10 CFR 
431.92(5).

---------------------------------------------------------------------------

[[Page 77310]]

    In the December 2021 NOPR, DOE proposed to amend its ``basic 
model'' definition for 3-phase ACUACs and ACUHPs with cooling capacity 
of less than 65,000 Btu/h and for 3-phase VRF with cooling capacity of 
less than 65,000 Btu/h to align with that for single-phase CAC/HPs, as 
this definition forms the basis for the requirements in 10 CFR 429.16. 
86 FR 70316, 70327-70328. DOE requested comment on its proposal to 
align the definition of ``basic model'' for three-phase equipment at 10 
CFR 431.96 with that for single-phase products at 10 CFR 430.2. Id.
    AHRI, Carrier, and Lennox supported aligning the definition of 
``basic model'' for three-phase equipment at 10 CFR 431.96 with that 
for single-phase products at 10 CFR 430.2. (AHRI, No. 16 at p. 5; 
Carrier, No. 15 at p. 5; Lennox, No. 14 at p. 4) Lennox further 
recommended that language in 10 CFR 430.2 that allows for ``essentially 
identical'' electrical equipment should also be included in 10 CFR 
431.92, with the added clarification that the various three-phase 
equipment with varying voltages are to be considered essentially 
identical. (Lennox, No. 14 at p. 4)
    After consideration, DOE finds Lennox's recommendation to be 
unnecessary because ``essentially identical'' at the proposed 10 CFR 
431.92(7)(i)-(iii) includes requirements on the power input for the 
compressor, outdoor fan, and indoor fan (as applicable). For example, 
for split systems manufactured by outdoor unit manufacturers (proposed 
10 CFR 431.92(7)(i)), one of the requirements to be considered 
``essentially identical'' is that the power input for the compressor be 
within 5 percent and the power input for the outdoor fan be within 20 
percent. DOE considers that these requirements on power input ensure 
that three-phase equipment employing differing three-phase voltages 
would still be considered to have ``essentially identical'' 
characteristics, regardless of the differing voltages. Therefore, DOE 
has concluded that the issue raised in Lennox's comment does not 
warrant deviating from DOE's proposal to harmonize the basic model 
definition for three-phase equipment with that for single-phase 
products.
    For the reasons discussed in this section and in the December 2021 
NOPR, DOE is amending and aligning the definition of ``basic model'' 
for three-phase equipment subject to this rulemaking at 10 CFR 431.96 
with that for single-phase products at 10 CFR 430.2.
3. Certification Reporting Requirements
    The certification reporting requirements for CAC/HPs at 10 CFR 
429.16 currently require more detail in filed certification reports 
than the certification requirements for commercial HVAC equipment at 10 
CFR 429.43. In the December 2021 NOPR, DOE proposed to retain the 
requirements for certification reports currently at 10 CFR 429.43 for 
the three-phase equipment subject to this rulemaking rather than 
adopting the certification report requirements for single-phase 
products at 10 CFR 429.16. 86 FR 70316, 70328.
    AHRI, Carrier, Lennox, and Trane supported retaining the 
requirements for certification reports currently at 10 CFR 429.43 
rather than adopting the certification reporting requirements for 
single-phase products at 10 CFR 429.16. (AHRI, No. 16 at pp. 5-6; 
Carrier, No. 15 at p. 5; Lennox, No. 14 at pp. 4-5; Trane, No. 19 at p. 
2) Carrier commented additionally that the confidence interval 
specified in 10 CFR 429.16(b)(3) for CAC/HPs \27\ is different from 
that specified in 10 CFR 429.43(a)(1)(ii)(B) for commercial HVAC 
equipment,\28\ and that three-phase equipment should use the same 
confidence interval of 90 percent, as they are based on the designs of 
their single-phase counterparts. (Carrier, No. 15 at p. 5)
---------------------------------------------------------------------------

    \27\ The sampling requirements at 10 CFR 429.16(b)(3) for 
central air conditioners and heat pumps specify a confidence 
interval of 90 percent.
    \28\ The sampling requirements at 10 CFR 429.43(a)(1)(ii)(B) for 
commercial HVAC equipment specify a confidence interval of 95 
percent.
---------------------------------------------------------------------------

    For the reasons discussed in the December 2021 NOPR and this 
document, in this final rule, DOE is retaining the certification 
reporting requirements for the three-phase equipment subject to this 
rulemaking (i.e., DOE is not aligning with the single-phase 
certification requirements at this time). Regarding the suggestion by 
Carrier to align the sampling plan confidence interval for the three-
phase equipment subject to this rulemaking with those of their single-
phase counterparts, DOE notes that this alignment was already proposed 
in the December 2021 NOPR and is resolved via the representation 
requirements adopted in the newly established 10 CFR 429.67. 
Specifically, DOE is adopting a 90 percent confidence interval for the 
sampling plans specified at 10 CFR 429.67(c)(2), mirroring the existing 
requirements for single-phase products in 10 CFR 429.16(b)(3).
4. Product-Specific Enforcement Provisions
    In the December 2021 NOPR, DOE proposed to amend its product-
specific enforcement requirements by adding provisions to a new 10 CFR 
429.134(s) \29\ for the three-phase equipment addressed in this 
rulemaking that would align with those already required at 10 CFR 
429.134(k) for single-phase products. 86 FR 70316, 70328. These 
provisions would pertain only to DOE assessment and enforcement testing 
and would not impact manufacturer testing. Id. Additionally, these 
requirements would apply only to equipment subject to any potential 
future standards that DOE may establish in terms of SEER2 and HSPF2. 
Id.
---------------------------------------------------------------------------

    \29\ The provisions proposed in the December 2021 NOPR at 10 CFR 
429.134(s) are being finalized at 10 CFR 429.134(y) in this final 
rule. 10 CFR 429.134(s) has since been established for direct-
expansion dedicated outdoor air systems (DX-DOASes).
---------------------------------------------------------------------------

    Regarding cooling capacity, DOE proposed that the cooling capacity 
of each tested unit be measured pursuant to the test procedure and that 
the mean of the measurement(s) (either the measured cooling capacity 
for a single unit sample or the average of the measured cooling 
capacities for a multiple unit sample of the test sample) be used to 
determine compliance with the applicable standards. Id.
    Regarding cyclic degradation coefficients, which are a measure of 
efficiency loss that would occur as a result of the compressor cycling 
to meet a low load level in field applications, DOE proposed to measure 
the cooling and/or heating cyclic degradation coefficient, 
CD\c\/CD\h\, respectively, by conducting the 
optional cyclic tests if the manufacturer certifies that it conducted 
the optional cyclic tests. If the manufacturer certifies that it did 
not conduct the optional cyclic tests, the proposal required that the 
default CD\c\/CD\h\ values specified in the test 
procedure be used as the basis for calculating SEER2 or HSPF2 for each 
unit tested. Id.
    DOE received no comments on these proposals. Regarding the cyclic 
degradation coefficients, DOE is clarifying that the selection of the 
default values of CD\c\ and/or CD\h\ be made 
according to the criteria for the cyclic test in section 4 of appendix 
F1, and not Sections 6.1.3.1 and 6.1.3.2 of AHRI 210/240-2023 as 
mistakenly proposed in the December 2021 NOPR. 86 FR 70316, 70343. 
Section 4 of appendix F1 aligns with section 3.5e of appendix M, which 
is referenced in the existing cyclic degradation provisions

[[Page 77311]]

for at 10 CFR 429.134(k)(2) for single-phase products. As stated in the 
December 2021 NOPR, the proposal intended to add product-specific 
enforcement requirements for three-phase equipment that align with 
those specified for single-phase products, which is better effectuated 
by the criteria in section 4 of appendix F1 rather than Sections 
6.1.3.1 and 6.1.3.2 of AHRI 210/240-2023. Id at 86 FR 70328.
    For the reasons discussed in this section and in the December 2021 
NOPR, DOE is adopting these provisions (including the minor revision 
discussed) at 10 CFR 429.134(y).

F. Other Comments Received on the NOPR

    In response to the December 2021 NOPR, DOE received several 
additional comments not specific to any of the issues on which DOE 
sought comment in the December 2021 NOPR and discussed previously in 
this final rule. This section addresses those comments.
    Joint Advocates, CA IOUs, NEEA, and NYSERDA recommended that DOE 
consider ways to improve the representativeness of the test procedures 
for ACUACs, ACUHPs, and VRFs with cooling capacity less than 65,000 
Btu/h in future rulemakings. In particular, Joint Advocates, CA IOUs, 
and NYSERDA encouraged DOE to investigate a load-based test procedure 
\30\ for both single-phase and three-phase equipment. (Joint Advocates, 
No. 17 at p. 2; CA IOUs, No. 18 at p. 3; NYSERDA, No. 13 at p. 2) Joint 
Advocates commented that a load-based test procedure, as compared to 
the current steady-state method, would be more representative of actual 
energy use and, in turn, would provide more accurate information about 
efficiency to purchasers. (Joint Advocates, No. 17 at p. 2) CA IOUs 
added that a dynamic load-based test procedure could yield 
representations that better reflect the average use cycle of a covered 
product. (CA IOUs, No. 18 at p. 3). NYSERDA commented that evaluation 
of a dynamic load-based testing would be especially important for 
equipment installed in office buildings due to the potential for 
overcooling. (NYSERDA, No. 13 at p. 2)
---------------------------------------------------------------------------

    \30\ A dynamic load-based test method differs from the steady-
state test method currently used in DOE test procedures for air 
conditioning and heat pump equipment. In a steady-state test method, 
the indoor room is maintained at a constant temperature throughout 
the test. In this type of test, any variable-speed or variable-
position components of air conditioners and heat pumps are set in a 
fixed position, which is typically specified by the manufacturer. In 
contrast, a dynamic load-based test has the conditioning load 
applied to the indoor room using a load profile that approximates 
how the load varies for units installed in the field. In this type 
of test, an air conditioning system or heat pump is allowed to 
automatically determine and vary its control settings in response to 
the imposed conditioning loads, rather than relying on manufacturer-
specified settings.
---------------------------------------------------------------------------

    CA IOUs and NYSERDA also suggested that DOE consider mandating the 
H42 heating test (as specified in the test procedure for 
central air conditioners and central air conditioning heat pumps at 
appendix M1) \31\ in a future rulemaking for the three-phase equipment 
subject to this rulemaking. (CA IOUs, No. 18 at p. 3; NYSERDA, No. 13 
at p. 2) Both commenters also suggested that DOE consider a controls 
verification procedure (``CVP'') for the H42 heating mode 
test, suggesting that this may serve as a first step to validate cold 
climate performance of variable-speed VRF heat pumps and ACUHPs while 
providing significant utility to consumers in cold climate regions. 
(Id.)
---------------------------------------------------------------------------

    \31\ The H42 heating test is an optional full-load 
test for central air conditioners and heat pumps conducted at an 
outdoor entering temperature of 5 [deg]F.
---------------------------------------------------------------------------

    NEEA recommended that DOE also consider including a CVP for the 
three-phase equipment subject to this rulemaking, similar to DOE's 
proposal to adopt the CVP specified in AHRI 1230-2021 for VRF multi-
split systems in a test procedure NOPR for VRF multi-split systems. 
(See 86 FR 706440 (Dec. 10, 2021)). (NEEA, No. 20 at p. 2) NEEA 
commented that while it understands that there is currently not a CVP 
associated with AHRI 210/240-2023, DOE could adopt a CVP in the test 
procedure for the three-phase equipment subject to this rulemaking 
similar to that defined for VRF multi-split systems in AHRI 1230-2021 
in order to ensure controls performance. (Id.)
    DOE is aware that there is ongoing work addressing questions about 
whether the current DOE and industry test procedures for variable-speed 
air conditioners and heat pumps are fully representative. However, in 
this final rule, DOE is aligning the test procedures for three-phase 
equipment with the current test procedure for single-phase products, 
consistent with the referenced industry test procedures in ASHRAE 90.1-
2019. EPCA requires that the test procedures for small commercial 
package air conditioning and heating equipment (including the three-
phase equipment subject to this rulemaking) shall be those generally 
accepted industry testing procedures or rating procedures developed or 
recognized by the AHRI or by ASHRAE, as referenced in ASHRAE Standard 
90.1. (42 U.S.C. 6314(a)(4)(A)) Further, EPCA requires that if an 
industry test procedure is amended, DOE must amend its test procedure 
to be consistent with the amended industry test procedure, unless DOE 
determines, by rule published in the Federal Register and supported by 
clear and convincing evidence, that such amended test procedure would 
not meet the requirements in 42 U.S.C. 6314(a)(2) and (3) related to 
representative use and test burden. (42 U.S.C. 6314(a)(4)(B)) AHRI 210/
240-2023, referenced in ASHRAE Standard 90.1, does not include a 
dynamic load based testing method, does not mandate the H42 
test, and does not include a CVP. Further, commenters did not provide 
evidence to support deviating from AHRI 210/240-2023 to adopt such 
provisions. Therefore, DOE has concluded that it lacks clear or 
convincing evidence to adopt the test methods and provisions suggested 
by Joint Advocates, CA IOUs, NEEA, and NYSERDA in this rulemaking.
    Additionally, CA IOUs and NYSERDA raised the issue of DOE coverage 
of air moving systems paired with coil-only three-phase ACUACs and 
ACUHPs. (CA IOUs, No. 18 at p. 2; NYSERDA, No. 13 at p. 2) CA IOUs and 
NYSERDA commented that DOE's test procedure set forth in appendix AA to 
subpart B of 10 CFR part 430 (``appendix AA'') addresses the 
measurement of energy consumption of furnace fans in single-phase 
products, but that no such test procedure exists in 10 CFR part 431 for 
indoor blowers or designated air movers paired with coil-only three-
phase ACUACs and ACUHPs. (Id.) NYSERDA further commented that thousands 
of coil-only three-phase ACUAC and ACUHP combinations are currently 
available and that the test procedure for the three-phase equipment 
subject to this rulemaking does not account for all energy being used 
for such systems. NYSERDA recommended that DOE investigate avenues to 
address this challenge. (NYSERDA, No. 13 at p. 2)
    As recognized by CA IOUs and NYSERDA, while the test method set 
forth in appendix AA addresses the measurement of energy consumption of 
furnace fans in single-phase products, it does not currently apply to 
three-phase furnace fans. While indoor fans present in blower-coil 
combinations of three-phase ACUAC and ACUHP are included in the three-
phase equipment subject to the test procedures being established as 
part of this rulemaking, any three-phase furnace fans paired with coil-
only combinations of three-phase ACUAC and ACUHP are not currently 
subject to

[[Page 77312]]

a test procedure that accounts for their energy consumption. Three-
phase furnace fans are outside the scope of this rulemaking as they are 
not covered within the definition of small commercial package air 
conditioning and heating equipment, but DOE may address this equipment 
as part of a separate rulemaking, as applicable.

G. Effective and Compliance Dates

    The effective date for the adopted test procedure amendments will 
be 30 days after publication of this final rule in the Federal 
Register. EPCA prescribes that all representations of energy efficiency 
and energy use, including those made on marketing materials and product 
labels, must be made in accordance with an amended test procedure 
beginning 360 days after publication of the final rule in the Federal 
Register. (42 U.S.C. 6314(d)(1)) To the extent the modified test 
procedures adopted in this final rule are required only for the 
evaluation and issuance of updated efficiency standards (e.g., 
standards using the SEER2 and HSPF2 metrics), compliance with the 
amended test procedure does not require use of such modified test 
procedure provisions until the compliance date of those updated 
standards.
    Any voluntary representations of SEER2 and HSPF2 made prior to the 
compliance date of amended standards for three-phase equipment that 
rely on SEER2 and HSPF2 would need to be based on appendix F1 starting 
360 days after publication of this final rule in the Federal Register. 
Manufacturers may use appendix F1 to certify compliance with any 
amended standards based on SEER2 and HSPF2, if adopted, prior to the 
applicable compliance date for those energy conservation standards.

H. Test Procedure Costs

    EPCA requires that the test procedures for small commercial package 
air conditioning and heating equipment, which includes 3-phase ACUACs 
and ACUHPs with cooling capacity of less than 65,000 Btu/h and 3-phase 
VRF with cooling capacity of less than 65,000 Btu/h, be generally 
accepted industry testing procedures or rating procedures developed or 
recognized by either AHRI or ASHRAE, as referenced in ASHRAE Standard 
90.1. (42 U.S.C. 6314(a)(4)(A)) Further, if such an industry test 
procedure is amended, DOE must amend its test procedure to be 
consistent with the amended industry test procedure unless DOE 
determines, by rule published in the Federal Register and supported by 
clear and convincing evidence, that such an amended test procedure 
would not meet the requirements in 42 U.S.C. 6314(a)(2)-(3) related to 
representative use and test burden. (42 U.S.C. 6314(a)(4)(B))
    In this final rule, DOE is amending the existing test procedures 
for three-phase, less than 65,000 Btu/h equipment by incorporating by 
reference, with some modification, the updated version of the 
applicable industry test method, AHRI 210/240-2023, including the 
energy efficiency metrics SEER2 and HSPF2. DOE is also amending certain 
representation requirements to align more closely with the 
representation requirements for single-phase CAC/HPs. Amendments to 
both the test procedures and representation requirements in this final 
rule are consistent with comments from interested parties who supported 
aligning the Federal regulations for the three-phase equipment 
addressed in this document with the regulations of their single-phase 
consumer product counterparts.
    DOE has determined that these test procedures would be 
representative of an average use cycle and would not be unduly 
burdensome for manufacturers to conduct. Appendix F, measuring both 
SEER and HSPF per ANSI/AHRI 210/240-2008, does not contain any changes 
from the current Federal test procedures, and therefore would not 
require retesting solely as a result of DOE's adoption of this 
amendment. Similarly, appendix F1, measuring both SEER2 and HSPF2 per 
AHRI 210/240-2023, would not lead to an increase in cost as compared 
with testing to the test procedures in appendix F. Specifically, DOE 
estimates that the cost for third-party lab testing in accordance with 
appendix F1 would be $5,500 for air conditioners and $8,500 for heat 
pumps, which is consistent with the costs for testing in accordance 
with the current test procedures.
    As discussed in section III.E.1 of this final rule, DOE is amending 
the representation requirements for certifying basic models of three-
phase, less than 65,000 Btu/h equipment to harmonize with the 
requirements for single-phase products. For models of outdoor units 
with no match and multi-split, multi-circuit, and multi-head mini-split 
systems, this amendment of the representation requirements may increase 
testing requirements for three-phase equipment compared to the existing 
requirements. However, DOE is not aware of any such models on the 
market in these categories, and, accordingly, DOE has concluded that 
the representation requirements will not lead to an increase in testing 
cost for any manufacturer.
    As discussed in section III.E.1 of this final rule, DOE is amending 
the AEDM \32\ requirements for certifying basic models of three-phase, 
less than 65,000 Btu/h single-package units and single-split systems. 
Because most manufacturers' models of three-phase, less than 65,000 
Btu/h equipment are nearly identical to their corresponding single-
phase consumer products, DOE is allowing the use of an AEDM validated 
using testing of otherwise identical single-phase counterparts for 
certifying basic models of three-phase, less than 65,000 Btu/h single 
package units and split systems. For manufacturers that produce both 
single-phase consumer products and three-phase, less than 65,000 Btu/h 
equipment, this adoption would reduce any burden that might result from 
the proposed test procedures in appendix F1 of this final rule because, 
for such manufacturers, all certification of three-phase, less than 
65,000 Btu/h equipment could be conducted using AEDMs without testing 
the three-phase, less than 65,000 Btu/h equipment.
---------------------------------------------------------------------------

    \32\ Manufacturers are not required to perform laboratory 
testing on all basic models. In accordance with 10 CFR 429.70, 
three-phase, less than 65,000 Btu/h equipment manufacturers may 
elect to use AEDMs. An AEDM is a computer modeling or mathematical 
tool that predicts the performance of non-tested basic models. Such 
tools, when properly developed, can provide a means to predict the 
energy usage or efficiency characteristics of a basic model of a 
given covered product or equipment and reduce the burden and cost 
associated with testing.
---------------------------------------------------------------------------

    As discussed previously throughout this final rule, the test 
procedures in appendix F1 will not be mandatory until the compliance 
date of any amended energy conservation standards based on SEER2 and 
HSPF2. Given that most manufacturers of the three-phase equipment 
subject to this final rule are AHRI members, and DOE is referencing the 
prevailing industry test procedure that was established for use in 
AHRI's certification program (which DOE presumes will be updated to 
include SEER2 and HSPF2), DOE expects that manufacturers will already 
be testing using the test methods in AHRI 210/240-2023 by January 1, 
2023--the effective date for minimum SEER2 and HSPF2 levels in ASHRAE 
90.1-2019 for three-phase equipment, and also the date on which testing 
according to appendix M1 for single-phase central air conditioners is 
required.
    Based on this expectation, DOE tentatively determined in the 
December 2021 NOPR that the test procedure amendments would not 
increase the testing burden on three-phase, less than 65,000 Btu/h 
equipment manufacturers. 86 FR 70316, 70329. Additionally, DOE

[[Page 77313]]

tentatively determined that the test procedure amendments would not 
require manufacturers to redesign any of the covered equipment, would 
not require changes to how the equipment is manufactured, and would not 
impact the utility of the equipment. Id.
    Lennox commented that the harmonized test procedures would reduce 
manufacturer burden as compared to manufacturers having to follow two 
separate test procedures. (Lennox, No. 14 at p. 5) AHRI indicated that 
there would be no expected increase in test burden if their concerns 
regarding the adoption of appendix G of AHRI 210/240-2023 were 
addressed. (AHRI, No. 16 at p. 6)
    In response to the comments by AHRI, DOE's reasoning behind its 
decision not to adopt appendix G of AHRI 210/240-2023 is discussed in 
section III.D.2.c of this final rule. And based on the reasons 
discussed in the December 2021 NOPR and this document, DOE has 
concluded that the test procedure amendments adopted in this final rule 
will not increase testing burden on manufacturers, compared to current 
industry practice.

IV. Procedural Issues and Regulatory Review

A. Review Under Executive Orders 12866 and 13563

    Executive Order (``E.O.'') 12866, ``Regulatory Planning and 
Review,'' as supplemented and reaffirmed by E.O. 13563, ``Improving 
Regulation and Regulatory Review,'' 76 FR 3821 (Jan. 21, 2011), 
requires agencies, to the extent permitted by law, to (1) propose or 
adopt a regulation only upon a reasoned determination that its benefits 
justify its costs (recognizing that some benefits and costs are 
difficult to quantify); (2) tailor regulations to impose the least 
burden on society, consistent with obtaining regulatory objectives, 
taking into account, among other things, and to the extent practicable, 
the costs of cumulative regulations; (3) select, in choosing among 
alternative regulatory approaches, those approaches that maximize net 
benefits (including potential economic, environmental, public health 
and safety, and other advantages; distributive impacts; and equity); 
(4) to the extent feasible, specify performance objectives, rather than 
specifying the behavior or manner of compliance that regulated entities 
must adopt; and (5) identify and assess available alternatives to 
direct regulation, including providing economic incentives to encourage 
the desired behavior, such as user fees or marketable permits, or 
providing information upon which choices can be made by the public. DOE 
emphasizes as well that E.O. 13563 requires agencies to use the best 
available techniques to quantify anticipated present and future 
benefits and costs as accurately as possible. In its guidance, the 
Office of Information and Regulatory Affairs (``OIRA'') in the Office 
of Management and Budget (``OMB'') has emphasized that such techniques 
may include identifying changing future compliance costs that might 
result from technological innovation or anticipated behavioral changes. 
For the reasons stated in the preamble, this final regulatory action is 
consistent with these principles.
    Section 6(a) of E.O. 12866 also requires agencies to submit 
``significant regulatory actions'' to OIRA for review. OIRA has 
determined that this final regulatory action does not constitute a 
``significant regulatory action'' under section 3(f) of E.O. 12866. 
Accordingly, this action was not submitted to OIRA for review under 
E.O. 12866.

B. Review Under the Regulatory Flexibility Act

    The Regulatory Flexibility Act (5 U.S.C. 601 et seq.) requires 
preparation of a final regulatory flexibility analysis (``FRFA'') for 
any final rule where the agency was first required by law to publish a 
proposed rule for public comment, unless the agency certifies that the 
rule, if promulgated, will not have a significant economic impact on a 
substantial number of small entities. As required by Executive Order 
13272, ``Proper Consideration of Small Entities in Agency Rulemaking,'' 
67 FR 53461 (August 16, 2002), DOE published procedures and policies on 
February 19, 2003, to ensure that the potential impacts of its rules on 
small entities are properly considered during the DOE rulemaking 
process. 68 FR 7990. DOE has made its procedures and policies available 
on the Office of the General Counsel's website: www.energy.gov/gc/office-general-counsel.
    DOE reviewed this final rule under the provisions of the Regulatory 
Flexibility Act and the policies and procedures published on February 
19, 2003.
    On December 8, 2021, DOE published in the Federal Register a notice 
of proposed rulemaking proposing, in relevant part, to update the 
references in the Federal test procedures to the most recent version of 
the relevant industry test procedures as they relate to air-cooled, 
three-phase, small commercial air conditioners and heat pumps with a 
cooling capacity of less than 65,000 British thermal units per hour 
(``3-phase ACUACs and ACUHPs with cooling capacity of less than 65,000 
Btu/h'') and air-cooled, three-phase, variable refrigerant flow 
(``VRF'' or ``VRF multi-split systems'') air conditioners and heat 
pumps with a cooling capacity of less than 65,000 Btu/h (``3-phase VRF 
with cooling capacity of less than 65,000 Btu/h''). In addition, DOE 
proposed to update most of its compliance and enforcement requirements 
for 3-phase ACUACs and ACUHPs with cooling capacity of less than 65,000 
Btu/h and for 3-phase VRF with cooling capacity of less than 65,000 
Btu/h to be consistent with those for the consumer product counterparts 
(i.e., air-cooled, single-phase, central air conditioners and central 
air conditioning heat pumps with a cooling capacity of less than 65,000 
Btu/h (which include single-phase VRF multi-split systems)).
    As part of the December 2021 NOPR, DOE conducted its initial 
regulatory flexibility analysis (``IRFA''). The following sections 
outline DOE's determination that this final rule does not have a 
``significant economic impact on a substantial number of small 
entities,'' and that the preparation of a FRFA is not warranted.
    DOE did not receive any written comments that specifically 
addressed the impacts on small businesses or that were provided 
directly in response to the IRFA request for comment.
    For manufacturers of 3-phase ACUACs and ACUHPs with cooling 
capacity of less than 65,000 Btu/h and 3-phase VRF with cooling 
capacity of less than 65,000 Btu/h, the Small Business Administration 
(``SBA'') has set a size threshold, which defines those entities 
classified as ``small businesses'' for the purposes of the statute. DOE 
used the SBA's small business size standards to determine whether any 
small entities would be subject to the requirements of the rule. See 13 
CFR part 121. The equipment covered by this final rule is classified 
under North American Industry Classification System (``NAICS'') code 
333415,\33\ ``Air-Conditioning and Warm Air Heating Equipment and 
Commercial and Industrial Refrigeration Equipment Manufacturing.'' In 
13 CFR 121.201, the SBA sets a threshold of 1,250 employees or fewer 
for an entity to be considered as a small business for this category.
---------------------------------------------------------------------------

    \33\ The size standards are listed by NAICS code and industry 
description and are available at : www.sba.gov/document/support-table-size-standards (last accessed July 18, 2022).
---------------------------------------------------------------------------

    DOE identified manufacturers using DOE's Compliance Certification

[[Page 77314]]

Database \34\ and prior rulemaking information. For three-phase less 
than 65,000 Btu/h ACUACs and ACUHPs, DOE identified seventeen original 
equipment manufacturers (``OEM'') covered by this rulemaking. DOE did 
not identify any manufacturers of three-phase, less than 65,000 But/h 
VRF. DOE screened out companies that do not meet the definition of a 
``small business'' or are foreign-owned and operated. DOE identified 
four small, domestic OEMs for consideration. DOE used publicly 
available information and subscription-based market research tools 
(e.g., reports from Dun & Bradstreet \35\) to determine headcount, 
revenue, and geographic presence of the small businesses. Of those four 
small OEMs, one of them is an AHRI member and three are not AHRI 
members.
---------------------------------------------------------------------------

    \34\ DOE's Compliance Certification Database is available at 
www.regulations.doe.gov/certification-data (last accessed July 18, 
2022).
    \35\ Dun & Bradstreet reports are available at 
app.dnbhoovers.com (last accessed July 18, 2022).
---------------------------------------------------------------------------

    DOE understands all AHRI members and all manufacturers currently 
certifying in the AHRI Directory (including small businesses) will be 
testing their models in accordance with AHRI 210/240-2023, the industry 
test procedure DOE is referencing, and using AHRI's certification 
program, which DOE presumes will be updated to include the SEER2 and 
HSPF2 metrics. The test procedures' amendments would not add any 
additional testing burden to manufacturers that are or will be using 
the AHRI 210/240-2023 test procedure for their models of 3-phase ACUACs 
and ACUHPs with cooling capacity of less than 65,000 Btu/h and 3-phase 
VRF with cooling capacity of less than 65,000 Btu/h.
    DOE determined the range of additional potential testing costs for 
the three small businesses that are not AHRI members and do not certify 
their equipment that is the subject of this final rule in the AHRI 
Directory. These small businesses would only incur additional testing 
costs if the companies would not otherwise be using the AHRI 210/240-
2023 test procedure to test their models of 3-phase ACUACs and ACUHPs 
with cooling capacity of less than 65,000 Btu/h and 3-phase VRF with 
cooling capacity of less than 65,000 Btu/h. Of these three small 
businesses, the first manufacturer certifies one basic model to the DOE 
Compliance Certification Database, the second manufacturer certifies 
three basic models to the DOE Compliance Certification Database, and 
the third manufacturer certifies twelve basic models to the DOE 
Compliance Certification Database.\36\
---------------------------------------------------------------------------

    \36\ DOE's Compliance Certification Database is available at 
www.regulations.doe.gov/certification-data (last accessed July 21, 
2022).
---------------------------------------------------------------------------

    In this final rule, DOE is relocating the current DOE test 
procedures to a new appendix F to subpart F of part 431 (``appendix 
F'') without change. Appendix F does not contain any changes from the 
current Federal test procedures, and therefore would have no cost to 
industry and would not require retesting as a result of DOE's adoption 
of this amendment to the test procedures.
    DOE is also amending the test procedures at appendix F1 to subpart 
F of part 431 (``appendix F1''). Specifically, DOE is incorporating by 
reference the updated industry test standard AHRI 210/240-2023 for 3-
phase ACUACs and ACUHPs with cooling capacity of less than 65,000 Btu/h 
(for which the current Federal test procedure references AHRI 210-240-
2008) and for 3-phase VRF with cooling capacity of less than 65,000 
Btu/h (for which the current Federal test procedure references AHRI 
1230-2010). In addition, DOE is adopting the efficiency metrics SEER2 
and HSPF2 from AHRI 210/240-2023 in the test procedure at appendix F1. 
Finally, DOE is harmonizing representation and enforcement requirements 
with those applicable to single-phase products.
    Appendix F1 adopts the most recent industry test procedure, AHRI 
210/240-2023. DOE determined the cost for third-party lab testing 
according to the appendix F1 test procedure to be $8,500 for three-
phase, less than 65,000 Btu/h heating equipment and $5,500 for three-
phase, less than 65,000 Btu/h air conditioning equipment.
    The first of the three small businesses that DOE analyzed 
manufactures one basic model of three-phase equipment with a cooling 
capacity less than 65,000 Btu/h, which is an air conditioner. If a 
manufacturer conducts physical testing to certify a basic model, two 
units are required to be tested for the basic model. If this 
manufacturer uses a third-party lab to test this basic model, DOE 
estimates this small business would incur additional testing costs of 
approximately $11,000. DOE estimates the annual revenue of this small 
business is approximately $82.5 million; thus, DOE estimates testing 
costs to be less than 0.01 percent of this manufacturer's annual 
revenue.
    The second of the three small businesses that DOE analyzed 
manufactures three basic models of three-phase equipment with a cooling 
capacity less than 65,000 Btu/h,--all of which are air conditioners. If 
this manufacturer uses a third-party lab to test these basic models, 
DOE estimates this small business would incur additional testing costs 
of approximately $33,000. DOE estimates the annual revenue of this 
small business to be approximately $16 million; thus, DOE estimates 
testing costs to be less than one percent of this manufacturer's annual 
revenue.
    The third of the three small businesses that DOE analyzed 
manufactures twelve basic models of three-phase equipment with a 
cooling capacity less than 65,000 Btu/h,--all of which are air 
conditioners. If this manufacturer uses a third-party lab to test these 
basic models, DOE estimates this small business would incur additional 
testing costs of approximately $132,000. DOE estimates the annual 
revenue of this small business to be approximately $120 million; thus, 
DOE estimates testing costs to be less than one percent of this 
manufacturer's annual revenue.
    As a result of this analysis, DOE determined that the cost impacts 
on the three small businesses represent less than 1 percent of annual 
revenue. Therefore, on the basis of the de minimis compliance burden, 
DOE certifies that this final rule does not have a ``significant 
economic impact on a substantial number of small entities,'' and that 
the preparation of a FRFA is not warranted. DOE will transmit a 
certification and supporting statement of factual basis to the Chief 
Counsel for Advocacy of the Small Business Administration for review 
under 5 U.S.C. 605(b).

C. Review Under the Paperwork Reduction Act of 1995

    Manufacturers of 3-phase ACUACs and ACUHPs with cooling capacity of 
less than 65,000 Btu/h and 3-phase VRF with cooling capacity of less 
than 65,000 Btu/h must certify to DOE that their products comply with 
any applicable energy conservation standards. To certify compliance, 
manufacturers must first obtain test data for their products according 
to the DOE test procedures, including any amendments adopted for those 
test procedures. DOE has established regulations for the certification 
and recordkeeping requirements for all covered consumer products and 
commercial equipment, including 3-phase ACUACs and ACUHPs with cooling 
capacity of less than 65,000 Btu/h and 3-phase VRF with cooling 
capacity of less than 65,000 Btu/h. (See generally 10 CFR part 429.) 
The

[[Page 77315]]

collection-of-information requirement for the certification and 
recordkeeping is subject to review and approval by OMB under the 
Paperwork Reduction Act (``PRA''). This requirement has been approved 
by OMB under OMB control number 1910-1400. Public reporting burden for 
the certification is estimated to average 35 hours per response, 
including the time for reviewing instructions, searching existing data 
sources, gathering and maintaining the data needed, and completing and 
reviewing the collection of information.
    DOE is not amending the certification or reporting requirements for 
3-phase ACUACs and ACUHPs with cooling capacity of less than 65,000 
Btu/h and 3-phase VRF with cooling capacity of less than 65,000 Btu/h 
in this final rule. Instead, DOE may consider proposals to amend the 
certification requirements and reporting for 3-phase ACUACs and ACUHPs 
with cooling capacity of less than 65,000 Btu/h and 3-phase VRF with 
cooling capacity of less than 65,000 Btu/h under a separate rulemaking 
regarding appliance and equipment certification. DOE will address 
changes to OMB Control Number 1910-1400 at that time, as necessary.
    Notwithstanding any other provision of the law, no person is 
required to respond to, nor shall any person be subject to a penalty 
for failure to comply with, a collection of information subject to the 
requirements of the PRA, unless that collection of information displays 
a currently valid OMB Control Number.

D. Review Under the National Environmental Policy Act of 1969

    In this final rule, DOE establishes test procedure amendments that 
it expects will be used to develop and implement future energy 
conservation standards for 3-phase ACUACs and ACUHPs with cooling 
capacity of less than 65,000 Btu/h and 3-phase VRF with cooling 
capacity of less than 65,000 Btu/h. DOE has determined that this rule 
falls into a class of actions that are categorically excluded from 
review under the National Environmental Policy Act of 1969 (42 U.S.C. 
4321 et seq.) and DOE's implementing regulations at 10 CFR part 1021. 
Specifically, DOE has determined that amending test procedures for 
measuring energy efficiency of consumer products and industrial 
equipment is consistent with activities identified in 10 CFR part 1021, 
appendix A to subpart D, A5 and A6. Accordingly, neither an 
environmental assessment nor an environmental impact statement is 
required.

E. Review Under Executive Order 13132

    Executive Order 13132, ``Federalism,'' 64 FR 43255 (August 4, 
1999), imposes certain requirements on agencies formulating and 
implementing policies or regulations that preempt State law or that 
have federalism implications. The Executive order requires agencies to 
examine the constitutional and statutory authority supporting any 
action that would limit the policymaking discretion of the States and 
to carefully assess the necessity for such actions. The Executive order 
also requires agencies to have an accountable process to ensure 
meaningful and timely input by State and local officials in the 
development of regulatory policies that have federalism implications. 
On March 14, 2000, DOE published a statement of policy describing the 
intergovernmental consultation process it will follow in the 
development of such regulations. 65 FR 13735. DOE examined this final 
rule and determined that it will not have a substantial direct effect 
on the States, on the relationship between the national government and 
the States, or on the distribution of power and responsibilities among 
the various levels of government. EPCA governs and prescribes Federal 
preemption of State regulations as to energy conservation for the 
products that are the subject of this final rule. States can petition 
DOE for exemption from such preemption to the extent, and based on 
criteria, set forth in EPCA. (42 U.S.C. 6297(d)) No further action is 
required by Executive Order 13132.

F. Review Under Executive Order 12988

    Regarding the review of existing regulations and the promulgation 
of new regulations, section 3(a) of Executive Order 12988, ``Civil 
Justice Reform,'' 61 FR 4729 (Feb. 7, 1996), imposes on Federal 
agencies the general duty to adhere to the following requirements: (1) 
eliminate drafting errors and ambiguity; (2) write regulations to 
minimize litigation; (3) provide a clear legal standard for affected 
conduct rather than a general standard; and (4) promote simplification 
and burden reduction. Section 3(b) of Executive Order 12988 
specifically requires that Executive agencies make every reasonable 
effort to ensure that the regulation (1) clearly specifies the 
preemptive effect, if any; (2) clearly specifies any effect on existing 
Federal law or regulation; (3) provides a clear legal standard for 
affected conduct while promoting simplification and burden reduction; 
(4) specifies the retroactive effect, if any; (5) adequately defines 
key terms; and (6) addresses other important issues affecting clarity 
and general draftsmanship under any guidelines issued by the Attorney 
General. Section 3(c) of Executive Order 12988 requires Executive 
agencies to review regulations in light of applicable standards in 
sections 3(a) and 3(b) to determine whether they are met or it is 
unreasonable to meet one or more of them. DOE has completed the 
required review and determined that, to the extent permitted by law, 
this final rule meets the relevant standards of Executive Order 12988.

G. Review Under the Unfunded Mandates Reform Act of 1995

    Title II of the Unfunded Mandates Reform Act of 1995 (``UMRA'') 
requires each Federal agency to assess the effects of Federal 
regulatory actions on State, local, and Tribal governments and the 
private sector. Pub. L. 104-4, sec. 201 (codified at 2 U.S.C. 1531). 
For a regulatory action resulting in a rule that may cause the 
expenditure by State, local, and Tribal governments, in the aggregate, 
or by the private sector of $100 million or more in any one year 
(adjusted annually for inflation), section 202 of UMRA requires a 
Federal agency to publish a written statement that estimates the 
resulting costs, benefits, and other effects on the national economy. 
(2 U.S.C. 1532(a), (b)) The UMRA also requires a Federal agency to 
develop an effective process to permit timely input by elected officers 
of State, local, and Tribal governments on a proposed ``significant 
intergovernmental mandate,'' and requires an agency plan for giving 
notice and opportunity for timely input to potentially affected small 
governments before establishing any requirements that might 
significantly or uniquely affect small governments. On March 18, 1997, 
DOE published a statement of policy on its process for 
intergovernmental consultation under UMRA. 62 FR 12820; also available 
at www.energy.gov/gc/office-general-counsel. DOE examined this final 
rule according to UMRA and its statement of policy and determined that 
the rule contains neither an intergovernmental mandate, nor a mandate 
that may result in the expenditure of $100 million or more in any year, 
so these requirements do not apply.

H. Review Under the Treasury and General Government Appropriations Act, 
1999

    Section 654 of the Treasury and General Government Appropriations 
Act, 1999 (Pub. L. 105-277) requires Federal agencies to issue a Family 
Policymaking Assessment for any rule

[[Page 77316]]

that may affect family well-being. This final rule will not have any 
impact on the autonomy or integrity of the family as an institution. 
Accordingly, DOE has concluded that it is not necessary to prepare a 
Family Policymaking Assessment.

I. Review Under Executive Order 12630

    DOE has determined, under Executive Order 12630, ``Governmental 
Actions and Interference with Constitutionally Protected Property 
Rights'' 53 FR 8859 (March 18, 1988), that this regulation will not 
result in any takings that might require compensation under the Fifth 
Amendment to the U.S. Constitution.

J. Review Under Treasury and General Government Appropriations Act, 
2001

    Section 515 of the Treasury and General Government Appropriations 
Act, 2001 (44 U.S.C. 3516 note) provides for agencies to review most 
disseminations of information to the public under guidelines 
established by each agency pursuant to general guidelines issued by 
OMB. OMB's guidelines were published at 67 FR 8452 (Feb. 22, 2002), and 
DOE's guidelines were published at 67 FR 62446 (Oct. 7, 2002). Pursuant 
to OMB Memorandum M-19-15, Improving Implementation of the Information 
Quality Act (April 24, 2019), DOE published updated guidelines which 
are available at www.energy.gov/sites/prod/files/2019/12/f70/DOE%20Final%20Updated%20IQA%20Guidelines%20Dec%202019.pdf. DOE has 
reviewed this final rule under the OMB and DOE guidelines and has 
concluded that it is consistent with applicable policies in those 
guidelines.

K. Review Under Executive Order 13211

    Executive Order 13211, ``Actions Concerning Regulations That 
Significantly Affect Energy Supply, Distribution, or Use,'' 66 FR 28355 
(May 22, 2001), requires Federal agencies to prepare and submit to OMB, 
a Statement of Energy Effects for any significant energy action. A 
``significant energy action'' is defined as any action by an agency 
that promulgated or is expected to lead to promulgation of a final 
rule, and that (1) is a significant regulatory action under Executive 
Order 12866, or any successor order; and (2) is likely to have a 
significant adverse effect on the supply, distribution, or use of 
energy; or (3) is designated by the Administrator of OIRA as a 
significant energy action. For any significant energy action, the 
agency must give a detailed statement of any adverse effects on energy 
supply, distribution, or use if the regulation is implemented, and of 
reasonable alternatives to the action and their expected benefits on 
energy supply, distribution, and use.
    This regulatory action is not a significant regulatory action under 
Executive Order 12866. Moreover, it would not have a significant 
adverse effect on the supply, distribution, or use of energy, nor has 
it been designated as a significant energy action by the Administrator 
of OIRA. Therefore, it is not a significant energy action, and, 
accordingly, DOE has not prepared a Statement of Energy Effects.

L. Review Under Section 32 of the Federal Energy Administration Act of 
1974

    Under section 301 of the Department of Energy Organization Act 
(Pub. L. 95-91; 42 U.S.C. 7101), DOE must comply with section 32 of the 
Federal Energy Administration Act of 1974, as amended by the Federal 
Energy Administration Authorization Act of 1977. (15 U.S.C. 788; 
``FEAA'') Section 32 essentially provides in relevant part that, where 
a proposed rule authorizes or requires use of commercial standards, the 
notice of proposed rulemaking must inform the public of the use and 
background of such standards. In addition, section 32(c) requires DOE 
to consult with the Attorney General and the Chairman of the Federal 
Trade Commission (``FTC'') concerning the impact of the commercial or 
industry standards on competition.
    The modifications to the test procedure for 3-phase ACUACs and 
ACUHPs with cooling capacity of less than 65,000 Btu/h and 3-phase VRF 
with cooling capacity of less than 65,000 Btu/h adopted in this final 
rule incorporates testing methods contained in certain sections of the 
following commercial standards: AHRI 210/240-2023 and ANSI/ASHRAE 37-
2009. DOE has evaluated these standards and is unable to conclude 
whether they fully comply with the requirements of section 32(b) of the 
FEAA (i.e., whether they were developed in a manner that fully provides 
for public participation, comment, and review.) DOE has consulted with 
both the Attorney General and the Chairman of the FTC about the impact 
on competition of using the methods contained in these standards and 
has received no comments objecting to their use.

M. Congressional Notification

    As required by 5 U.S.C. 801, DOE will report to Congress on the 
promulgation of this final rule before its effective date. The report 
will state that it has been determined that the rule is not a ``major 
rule'' as defined by 5 U.S.C. 804(2).

N. Description of Materials Incorporated by Reference

    ANSI/AHRI 210/240-2008 is an industry-accepted test procedure for 
measuring the performance of air conditioning and heating equipment. 
ANSI/AHRI 210/240-2008 is available on AHRI's website at: 
www.ahrinet.org/app_content/ahri/files/standards%20pdfs/ansi%20standards%20pdfs/ansi.ahri%20standard%20210.240%20with%20addenda%201%20and%202.pdf.
    AHRI 210/240-2023 is an updated version of the industry-accepted 
test procedure for measuring the performance of air conditioning and 
heating equipment. AHRI 210/240-2023 is available on AHRI's website at 
www.ahrinet.org/search-standards.aspx.
    ANSI/AHRI 1230-2010 is an industry-accepted test procedure for 
measuring the performance of VRF multi-split air conditioning and 
heating equipment. ANSI/AHRI 1230-2010 is available on AHRI's website 
at www.ahrinet.org/search-standards.aspx.
    ANSI/ASHRAE 37-2009 is an industry-accepted test procedure that 
provides a method of test for many categories of air conditioning and 
heating equipment. ANSI/ASHRAE 37-2009 is available on ANSI's website 
at webstore.ansi.org.
    The following standards were previously approved for incorporation 
by reference in the section where they appear and no change is made: 
AHRI 210/240-2008, AHRI 340/360-2007, ASHRAE 127-2007, and ISO Standard 
13256-1.

V. Approval of the Office of the Secretary

    The Secretary of Energy has approved publication of this final 
rule.

List of Subjects

10 CFR Part 429

    Administrative practice and procedure, Confidential business 
information, Energy conservation, Household appliances, Imports, 
Incorporation by reference, Intergovernmental relations, Reporting and 
recordkeeping requirements, Small businesses.

10 CFR Part 431

    Administrative practice and procedure, Confidential business 
information, Energy conservation test procedures, Incorporation by 
reference, Reporting and recordkeeping requirements.

Signing Authority

    This document of the Department of Energy was signed on November 
22,

[[Page 77317]]

2022, by Francisco Alejandro Moreno, Acting Assistant Secretary for 
Energy Efficiency and Renewable Energy, pursuant to delegated authority 
from the Secretary of Energy. That document with the original signature 
and date is maintained by DOE. For administrative purposes only, and in 
compliance with requirements of the Office of the Federal Register, the 
undersigned DOE Federal Register Liaison Officer has been authorized to 
sign and submit the document in electronic format for publication, as 
an official document of the Department of Energy. This administrative 
process in no way alters the legal effect of this document upon 
publication in the Federal Register.

    Signed in Washington, DC, on November 30, 2022.
Treena V. Garrett,
Federal Register Liaison Officer, U.S. Department of Energy.

    For the reasons stated in the preamble, DOE amends parts 429 and 
431 of Chapter II of Title 10, Code of Federal Regulations as set forth 
below:

PART 429--CERTIFICATION, COMPLIANCE, AND ENFORCEMENT FOR CONSUMER 
PRODUCTS AND COMMERCIAL AND INDUSTRIAL EQUIPMENT

0
1. The authority citation for part 429 continues to read as follows:

    Authority:  42 U.S.C. 6291-6317; 28 U.S.C. 2461 note.


0
2. Amend Sec.  429.4 by:
0
a. Redesignating paragraphs (c)(1) through (c)(4) as paragraphs (c)(2) 
through (c)(5); and
0
b. Adding new paragraph (c)(1) .
    The addition reads as follows:


Sec.  429.4  Materials incorporated by reference.

* * * * *
    (c) * * *
    (1) AHRI Standard 210/240-2023, (``AHRI 210/240-2023''), 2023 
Standard for Performance Rating of Unitary Air-conditioning & Air-
source Heat Pump Equipment, copyright 2020; IBR approved for Sec.  
429.67.
* * * * *

0
3. Amend Sec.  429.12 by revising paragraph (b)(8) to read as follows:


Sec.  429.12  General requirements applicable to certification reports.

* * * * *
    (b) * * *
    (8) The test sample size as follows:
    (i) The number of units tested for the basic model; or
    (ii) In the case of single-split system or single-package central 
air conditioners and central air conditioning heat pumps; air-cooled, 
three-phase, small commercial package air conditioning and heating 
equipment with a cooling capacity of less than 65,000 Btu/h; air-
cooled, three-phase, variable refrigerant flow multi-split air 
conditioners and heat pumps with a cooling capacity of less than 65,000 
Btu/h; or multi-split, multi-circuit, or multi-head mini-split systems 
other than the ``tested combination,'' the number of units tested for 
each individual combination or individual model; or
    (iii) If an AEDM was used in lieu of testing, enter ``0'' (and in 
the case of central air conditioners and central air conditioning heat 
pumps, this must be indicated separately for each metric);
* * * * *

0
4. Amend Sec.  429.43 by:
0
a. Revising the section heading;
0
b. Removing paragraphs (b)(2)(iii), (iv,) (ix) and (x);
0
c. Redesignating paragraphs (b)(2)(v) through (viii) as paragraphs 
(b)(2)(iii) through (vi);
0
d. Redesignating paragraphs (b)(2)(xi) through (xiv) as paragraphs 
(b)(2)(vii) through (x).
0
e. Removing paragraphs (b)(4)(iii) through (vi); and
0
f. Redesignating paragraphs (b)(4)(vii) through (xiii) as paragraphs 
(b)(4)(iii) through (ix).
    The revision reads as follows:


Sec.  429.43  Commercial heating, ventilating, air conditioning (HVAC) 
equipment (excluding air-cooled, three-phase, small commercial package 
air conditioning and heating equipment with a cooling capacity of less 
than 65,000 British thermal units per hour and air-cooled, three-phase, 
variable refrigerant flow multi-split air conditioners and heat pumps 
with less than 65,000 British thermal units per hour cooling capacity).

* * * * *

0
5. Add Sec.  429.67 to read as follows:


Sec.  429.67  Air-cooled, three-phase, small commercial package air 
conditioning and heating equipment with a cooling capacity of less than 
65,000 British thermal units per hour and air-cooled, three-phase, 
variable refrigerant flow multi-split air conditioners and heat pumps 
with a cooling capacity of less than 65,000 British thermal units per 
hour.

    (a) Applicability. (1) For air-cooled, three-phase, small 
commercial package air conditioning and heating equipment with a 
cooling capacity of less than 65,000 Btu/h and air-cooled, three-phase, 
variable refrigerant flow multi-split air conditioners and heat pumps 
with a cooling capacity of less than 65,000 Btu/h subject to standards 
in terms of seasonal energy efficiency ratio (SEER) and heating 
seasonal performance factor (HSPF), representations with respect to the 
energy use or efficiency, including compliance certifications, are 
subject to the requirements in Sec.  429.43 of this title as it 
appeared in the 10 CFR parts 200-499 edition revised as of January 1, 
2021.
    (2) For air-cooled, three-phase, small commercial package air 
conditioning and heating equipment with a cooling capacity of less than 
65,000 Btu/h and air-cooled, three-phase, variable refrigerant flow 
multi-split air conditioners and heat pumps with a cooling capacity of 
less than 65,000 Btu/h subject to standards in terms of seasonal energy 
efficiency ratio 2 (SEER2) and heating seasonal performance factor 2 
(HSPF2) metrics, representations with respect to the energy use or 
efficiency, including compliance certifications, are subject to the 
requirements in this section. If manufacturers choose to certify 
compliance with any standards in terms of SEER2 and HSPF2 prior to the 
applicable compliance date for those standards, the requirements of 
this section must be followed.
    (b) Determination of Represented Value--(1) Required represented 
values. Determine the represented values (including SEER2, HSPF2, 
cooling capacity, and heating capacity, as applicable) for the 
individual models/combinations (or ``tested combinations'') specified 
in table 1 to this paragraph (b)(1).

                       Table 1 to Paragraph (b)(1)
------------------------------------------------------------------------
                                       Equipment           Required
            Category                  subcategory     represented values
------------------------------------------------------------------------
Single-Package unit.............  Single-Package AC   Every individual
                                   (including Space-   model distributed
                                   Constrained).       in commerce.
                                  Single-Package HP   ..................
                                   (including Space-
                                   Constrained).

[[Page 77318]]

 
Outdoor Unit and Indoor Unit      Single-Split-       Every individual
 (Distributed in Commerce by OUM   System AC with      combination
 (Outdoor Unit Manufacturer)).     Single-Stage or     distributed in
                                   Two-Stage           commerce. Each
                                   Compressor          model of outdoor
                                   (including Space-   unit must include
                                   Constrained and     a represented
                                   Small-Duct, High    value for at
                                   Velocity Systems    least one coil-
                                   (SDHV)).            only individual
                                                       combination that
                                                       is distributed in
                                                       commerce and
                                                       which is
                                                       representative of
                                                       the least
                                                       efficient
                                                       combination
                                                       distributed in
                                                       commerce with
                                                       that particular
                                                       model of outdoor
                                                       unit. For that
                                                       particular model
                                                       of outdoor unit,
                                                       additional
                                                       represented
                                                       values for coil-
                                                       only and blower-
                                                       coil individual
                                                       combinations are
                                                       allowed, if
                                                       distributed in
                                                       commerce.
                                  Single-Split-       Every individual
                                   System AC with      combination
                                   Other Than Single-  distributed in
                                   Stage or Two-       commerce,
                                   Stage Compressor    including all
                                   (including Space-   coil-only and
                                   Constrained and     blower coil
                                   SDHV).              combinations.
                                  Single-Split-       Every individual
                                   System HP           combination
                                   (including Space-   distributed in
                                   Constrained and     commerce.
                                   SDHV).
                                  Multi-Split, Multi- For each model of
                                   Circuit, or Multi-  outdoor unit, at
                                   Head Mini-Split     a minimum, a non-
                                   Split System--non-  ducted ``tested
                                   SDHV (including     combination.''
                                   Space-              For any model of
                                   Constrained).       outdoor unit also
                                                       sold with models
                                                       of ducted indoor
                                                       units, a ducted
                                                       ``tested
                                                       combination.''
                                                       When determining
                                                       represented
                                                       values on or
                                                       after the
                                                       compliance date
                                                       of any amended
                                                       energy
                                                       conservation
                                                       standards, the
                                                       ducted ``tested
                                                       combination''
                                                       must comprise the
                                                       highest static
                                                       variety of ducted
                                                       indoor unit
                                                       distributed in
                                                       commerce (i.e.,
                                                       conventional, mid-
                                                       static, or low-
                                                       static).
                                                       Additional
                                                       representations
                                                       are allowed, as
                                                       described in
                                                       paragraph (d)(3)
                                                       of this section.
                                  Multi-Split, Multi- For each model of
                                   Circuit, or Multi-  outdoor unit, an
                                   Head Mini-Split     SDHV ``tested
                                   Split System--      combination.''
                                   SDHV.               Additional
                                                       representations
                                                       are allowed, as
                                                       described in
                                                       paragraph (d)(3)
                                                       of this section.
Indoor Unit Only Distributed in   Single-Split-       Every individual
 Commerce by ICM (Independent      System Air          combination
 Coil Manufacturer).               Conditioner         distributed in
                                   (including Space-   commerce.
                                   Constrained and
                                   SDHV).
                                  Single-Split-       ..................
                                   System Heat Pump
                                   (including Space-
                                   Constrained and
                                   SDHV).
                                  Multi-Split, Multi- For a model of
                                   Circuit, or Multi-  indoor unit
                                   Head Mini-Split     within each basic
                                   Split System--      model, a SDHV
                                   SDHV.               ``tested
                                                       combination.''
                                                       Additional
                                                       representations
                                                       are allowed, as
                                                       described in
                                                       section
                                                       (d)(3)(ii) of
                                                       this section.
-----------------------------------------------------
Outdoor Unit with no Match..........................  Every model of
                                                       outdoor unit
                                                       distributed in
                                                       commerce (tested
                                                       with a model of
                                                       coil-only indoor
                                                       unit as specified
                                                       in paragraph
                                                       (c)(2) of this
                                                       section).
------------------------------------------------------------------------

    (2) Refrigerants. (i) If a model of outdoor unit (used in a single-
split, multi-split, multi-circuit, multi-head mini-split, and/or 
outdoor unit with no match system) is distributed in commerce and 
approved for use with multiple refrigerants, a manufacturer must 
determine all represented values for that model using each refrigerant 
that can be used in an individual combination of the basic model 
(including outdoor units with no match or ``tested combinations''). 
This requirement may apply across the listed categories in table 1 to 
paragraph (b)(1) of this section. A refrigerant is considered approved 
for use if it is listed on the nameplate of the outdoor unit. If any of 
the refrigerants approved for use is HCFC-22 or has a 95 [deg]F 
midpoint saturation absolute pressure that is 18 percent of 
the 95 [deg]F saturation absolute pressure for HCFC-22, or if there are 
no refrigerants designated as approved for use, a manufacturer must 
determine represented values (including SEER2, HSPF2, cooling capacity, 
and heating capacity, as applicable) for, at a minimum, an outdoor unit 
with no match. If a model of outdoor unit is not charged with a 
specified refrigerant from the point of manufacture or if the unit is 
shipped requiring the addition of more than two pounds of refrigerant 
to meet the charge required for testing per Section 5.1.8 of AHRI 210/
240-2023 (incorporated by reference, see Sec.  429.4) (unless either 
{a{time}  the factory charge is equal to or greater than 70 percent of 
the outdoor unit internal volume multiplied by the liquid density of 
refrigerant at 95 [deg]F or {b{time}  an A2L refrigerant is approved 
for use and listed in the certification report), a manufacturer must 
determine represented values (including SEER2, HSPF2, cooling capacity, 
and heating capacity, as applicable) for, at a minimum, an outdoor unit 
with no match.
    (ii) If a model is approved for use with multiple refrigerants, a 
manufacturer may make multiple separate representations for the 
performance of that model (all within the same individual combination 
or outdoor unit with no match) using the multiple

[[Page 77319]]

approved refrigerants. In the alternative, manufacturers may certify 
the model (all within the same individual combination or outdoor unit 
with no match) with a single representation, provided that the 
represented value is no more efficient than its performance using the 
least-efficient refrigerant. A single representation made for multiple 
refrigerants may not include equipment in multiple categories or 
equipment subcategories listed in table 1 to paragraph (b)(1) of this 
section.
    (3) Limitations for represented values of individual combinations. 
Paragraph (b)(3)(i) of this section explains the limitations for 
represented values of individual combinations (or ``tested 
combinations'').
    (i) Multiple product classes. Models of outdoor units that are 
rated and distributed in individual combinations that span multiple 
product classes must be tested, rated, and certified pursuant to 
paragraph (b) of this section as compliant with the applicable standard 
for each product class.
    (ii) Reserved.
    (4) Requirements. All represented values under paragraph (b) of 
this section must be based on testing in accordance with the 
requirements in paragraph (c) of this section or the application of an 
AEDM or other methodology as allowed in paragraph (d) of this section.
    (c) Units tested--(1) General. The general requirements of Sec.  
429.11 apply to air-cooled, three-phase, small commercial package air 
conditioning and heating equipment with a cooling capacity of less than 
65,000 Btu/h, and air-cooled, three-phase, variable refrigerant flow 
multi-split air conditioners and heat pumps with a cooling capacity of 
less than 65,000 Btu/h; and
    (2) Sampling plans and represented values. For individual models 
(for single-package systems) or individual combinations (for split-
systems, including ``tested combinations'' for multi-split, multi-
circuit, and multi-head mini-split systems) with represented values 
determined through testing, each individual model/combination (or 
``tested combination'') must have a sample of sufficient size tested in 
accordance with the applicable provisions of this subpart. For heat 
pumps (other than heating-only heat pumps), all units of the sample 
population must be tested in both the cooling and heating modes and the 
results used for determining all representations. The represented 
values for any individual model/combination must be assigned such that:
    (i) SEER2 and HSPF2. Any represented value of the energy efficiency 
or other measure of energy consumption for which consumers would favor 
higher values shall be less than or equal to the lower of:
    (A) The mean of the sample, where:

    [GRAPHIC] [TIFF OMITTED] TR16DE22.014
    
and, x is the sample mean; n is the number of samples; and xi is the 
ith sample; or,

    (B) The lower 90 percent confidence limit (LCL) of the true mean 
divided by 0.95, where:

[GRAPHIC] [TIFF OMITTED] TR16DE22.015

And x is the sample mean; s is the sample standard deviation; n is 
the number of samples; and t0.90 is the t statistic for a 
90 percent one-tailed confidence interval with n-1 degrees of 
freedom (from appendix A of this subpart). Round represented values 
of SEER2 and HSPF2 to the nearest 0.05.

    (ii) Cooling Capacity and Heating Capacity. The represented values 
of cooling capacity and heating capacity must each be a self-declared 
value that is:
    (A) Less than or equal to the lower of:
    (1) The mean of the sample, where:

    [GRAPHIC] [TIFF OMITTED] TR16DE22.016
    
and, x is the sample mean; n is the number of samples; and xi is the 
i\th\ sample; or,

    (2) The lower 90 percent confidence limit (LCL) of the true mean 
divided by 0.95, where:

[GRAPHIC] [TIFF OMITTED] TR16DE22.017

And x is the sample mean; s is the sample standard deviation; n is 
the number of samples; and t0.90 is the t statistic for a 
90 percent one-tailed confidence interval with n-1 degrees of 
freedom (from appendix D of this part).

    (B) Rounded according to:
    (1) The nearest 100 Btu/h if cooling capacity or heating capacity 
is less than 20,000 Btu/h,
    (2) The nearest 200 Btu/h if cooling capacity or heating capacity 
is greater than or equal to 20,000 Btu/h but less than 38,000 Btu/h, 
and
    (3) The nearest 500 Btu/h if cooling capacity or heating capacity 
is greater than or equal to 38,000 Btu/h and less than 65,000 Btu/h.
    (d) Determination of represented values--(1) All basic models 
except outdoor units with no match and multi-split systems, multi-
circuit systems, and multi-head mini-split systems. For every 
individual model/combination within a basic model, either--
    (i) A sample of sufficient size, comprised of production units or 
representing production units, must be tested as complete systems with 
the resulting represented values for the individual model/combination 
obtained in accordance with paragraphs (c)(1) and (2) of this section; 
or
    (ii) The represented values of the measures of energy efficiency or 
energy consumption through the application of an AEDM in accordance 
with paragraph (e) of this section and Sec.  429.70.
    (2) Outdoor units with no match. All models of outdoor units with 
no match within a basic model must be tested with a model of coil-only 
indoor unit meeting the requirements of Section 5.1.6.2 of AHRI 210/
240-2023. Models of outdoor units with no match may not be rated with 
an AEDM, other than to determine the represented values for models 
using approved refrigerants other than the one used in testing.
    (3) For multi-split systems, multi-circuit systems, and multi-head 
mini-split systems. The following applies:
    (i) For each non-SDHV basic model, at a minimum, a manufacturer 
must test the model of outdoor unit with a ``tested combination'' 
composed entirely of non-ducted indoor units. For any models of outdoor 
units also sold with models of ducted indoor units, a manufacturer must 
test a second ``tested combination'' composed entirely of ducted indoor 
units (in addition to the non-ducted combination). The ducted ``tested 
combination'' must comprise the highest static variety of ducted indoor 
unit distributed in commerce (i.e., conventional, mid-static, or low-
static).
    (ii) If a manufacturer chooses to make representations of a variety 
of a basic model (i.e., conventional, low static, or mid-static) other 
than a variety for which a representation is required under paragraph 
(b)(1) of this section the manufacturer must conduct testing of a 
tested combination according to the requirements in paragraphs (c)(1) 
and (2) of this section.
    (iii) For basic models that include mixed combinations of indoor 
units (i.e., combinations that are comprised of any two of the 
following varieties--non-ducted, low-static, mid-static, and 
conventional ducted indoor units), the represented value for the mixed 
combination is the mean of the represented values for the individual 
component combinations as determined in accordance with paragraphs 
(c)(1) and (2) and (d)(3)(i) and (ii) of this section.

[[Page 77320]]

    (iv) For each SDHV basic model distributed in commerce by an OUM, 
the OUM must, at a minimum, test the model of outdoor unit with a 
``tested combination'' composed entirely of SDHV indoor units. For each 
SDHV basic model distributed in commerce by an ICM, the ICM must test 
the model of indoor unit with a ``tested combination'' composed 
entirely of SDHV indoor units, where the outdoor unit is the least 
efficient model of outdoor unit with which the SDHV indoor unit will be 
paired. The least efficient model of outdoor unit is the model of 
outdoor unit in the lowest SEER2 combination as certified by the 
outdoor unit manufacturer. If there are multiple outdoor unit models 
with the same lowest SEER2 represented value, the indoor coil 
manufacturer may select one for testing purposes.
    (v) For basic models that include SDHV and an indoor unit of 
another variety (i.e., non-ducted, low-static, mid-static, and 
conventional ducted), the represented value for the mixed SDHV/other 
combination is the mean of the represented values for the SDHV and 
other tested combination as determined in accordance with paragraphs 
(c)(1) and (2) and paragraphs (d)(3)(i) through (ii) of this section.
    (vi) All other individual combinations of models of indoor units 
for the same model of outdoor unit for which the manufacturer chooses 
to make representations must be rated as separate basic models, and the 
provisions of paragraphs (c)(1) and (2) and (d)(3)(i) through (v) of 
this section apply.
    (e) Alternative efficiency determination methods. In lieu of 
testing, represented values of efficiency or consumption may be 
determined through the application of an AEDM pursuant to the 
requirements of Sec.  429.70(l) and the provisions of this section.
    (1) Energy efficiency. Any represented value of the SEER2, HSPF2, 
or other measure of energy efficiency of an individual model/
combination for which consumers would favor higher values must be less 
than or equal to the output of the AEDM but no less than the standard.
    (2) Cooling capacity. The represented value of cooling capacity of 
an individual model/combination must be no greater than the cooling 
capacity output simulated by the AEDM.
    (3) Heating capacity. The represented value of heating capacity of 
an individual model/combination must be no greater than the heating 
capacity output simulated by the AEDM.
    (f) Certification reports. This paragraph specifies the information 
that must be included in a certification report.
    (1) The requirements of Sec.  429.12; and
    (2) Pursuant to Sec.  429.12(b)(13), for each individual model (for 
single-package systems) or individual combination (for split-systems, 
including outdoor units with no match and ``tested combinations'' for 
multi-split, multi-circuit, and multi-head mini-split systems), a 
certification report must include the following public equipment-
specific information:
    (i) Commercial package air conditioning equipment that is air-
cooled with a cooling capacity of less than 65,000 Btu/h (3-Phase): The 
seasonal energy efficiency ratio (SEER in British thermal units per 
Watt-hour (Btu/Wh)), and the rated cooling capacity in British thermal 
units per hour (Btu/h).
    (ii) Commercial package heating equipment that is air-cooled with a 
cooling capacity of less than 65,000 Btu/h (3-Phase): The seasonal 
energy efficiency ratio (SEER in British thermal units per Watt-hour 
(Btu/Wh)), the heating seasonal performance factor (HSPF in British 
thermal units per Watt-hour (Btu/Wh)), and the rated cooling capacity 
in British thermal units per hour (Btu/h).
    (iii) Variable refrigerant flow multi-split air conditioners that 
are air-cooled with rated cooling capacity of less than 65,000 Btu/h 
(3-Phase): The seasonal energy efficiency ratio (SEER in British 
thermal units per Watt-hour (Btu/Wh)) and rated cooling capacity in 
British thermal units per hour (Btu/h).
    (iv) Variable refrigerant flow multi-split heat pumps that are air-
cooled with rated cooling capacity of less than 65,000 Btu/h (3-Phase): 
The seasonal energy efficiency ratio (SEER in British thermal units per 
Watt-hour (Btu/Wh), the heating seasonal performance factor (HSPF in 
British thermal units per Watt-hour (Btu/Wh), and rated cooling 
capacity in British thermal units per hour (Btu/h).
    (3) Pursuant to Sec.  429.12(b)(13), for each individual model/
combination (including outdoor units with no match and ``tested 
combinations''), a certification report must include supplemental 
information submitted in PDF format. The equipment-specific, 
supplemental information must include any additional testing and 
testing set up instructions (e.g., charging instructions) for the basic 
model; identification of all special features that were included in 
rating the basic model; and all other information (e.g., operational 
codes or component settings) necessary to operate the basic model under 
the required conditions specified by the relevant test procedure. A 
manufacturer may also include with a certification report other 
supplementary items in PDF format (e.g., manuals) for DOE consideration 
in performing testing under subpart C of this part. The equipment-
specific, supplemental information must include at least the following:
    (i) Air cooled commercial package air conditioning equipment with a 
cooling capacity of less than 65,000 Btu/h (3-phase): The nominal 
cooling capacity in British thermal units per hour (Btu/h); rated 
airflow in standard cubic feet per minute (SCFM) for each fan coil; 
rated static pressure in inches of water; refrigeration charging 
instructions (e.g., refrigerant charge, superheat and/or subcooling 
temperatures); frequency or control set points for variable speed 
components (e.g., compressors, VFDs); required dip switch/control 
settings for step or variable components; a statement whether the model 
will operate at test conditions without manufacturer programming; any 
additional testing instructions, if applicable; if a variety of motors/
drive kits are offered for sale as options in the basic model to 
account for varying installation requirements, the model number and 
specifications of the motor (to include efficiency, horsepower, open/
closed, and number of poles) and the drive kit, including settings, 
associated with that specific motor that were used to determine the 
certified rating; and which, if any, special features were included in 
rating the basic model.
    (ii) Commercial package heating equipment that is air-cooled with a 
cooling capacity of less than 65,000 Btu/h (3-phase): The nominal 
cooling capacity in British thermal units per hour (Btu/h); rated 
heating capacity in British thermal units per hour (Btu/h); rated 
airflow in standard cubic feet per minute (SCFM) for each fan coil; 
rated static pressure in inches of water; refrigeration charging 
instructions (e.g., refrigerant charge, superheat and/or subcooling 
temperatures); frequency or control set points for variable speed 
components (e.g., compressors, VFDs); required dip switch/control 
settings for step or variable components; a statement whether the model 
will operate at test conditions without manufacturer programming; any 
additional testing instructions, if applicable; if a variety of motors/
drive kits are offered for sale as options in the basic model to 
account for varying installation requirements, the model number and 
specifications of the motor

[[Page 77321]]

(to include efficiency, horsepower, open/closed, and number of poles) 
and the drive kit, including settings, associated with that specific 
motor that were used to determine the certified rating; and which, if 
any, special features were included in rating the basic model.
    (iii) Variable refrigerant flow multi-split air conditioners that 
are air-cooled with a cooling capacity of less than 65,000 Btu/h (3-
Phase): The nominal cooling capacity in British thermal units per hour 
(Btu/h); outdoor unit(s) and indoor units identified in the tested 
combination; components needed for heat recovery, if applicable; rated 
airflow in standard cubic feet per minute (SCFM) for each indoor unit; 
rated static pressure in inches of water; compressor frequency set 
points; required dip switch/control settings for step or variable 
components; a statement whether the model will operate at test 
conditions without manufacturer programming; any additional testing 
instructions, if applicable; if a variety of motors/drive kits are 
offered for sale as options in the basic model to account for varying 
installation requirements, the model number and specifications of the 
motor (to include efficiency, horsepower, open/closed, and number of 
poles) and the drive kit, including settings, associated with that 
specific motor that were used to determine the certified rating; and 
which, if any, special features were included in rating the basic 
model. Additionally, upon DOE request, the manufacturer must provide a 
layout of the system set-up for testing including charging instructions 
consistent with the installation manual.
    (iv) Variable refrigerant flow multi-split heat pumps that are air-
cooled with a rated cooling capacity of less than 65,000 Btu/h (3-
Phase): The nominal cooling capacity in British thermal units per hour 
(Btu/h); rated heating capacity in British thermal units per hour (Btu/
h); outdoor unit(s) and indoor units identified in the tested 
combination; components needed for heat recovery, if applicable; rated 
airflow in standard cubic feet per minute (SCFM) for each indoor unit; 
rated static pressure in inches of water; compressor frequency set 
points; required dip switch/control settings for step or variable 
components; a statement whether the model will operate at test 
conditions without manufacturer programming; any additional testing 
instructions, if applicable; if a variety of motors/drive kits are 
offered for sale as options in the basic model to account for varying 
installation requirements, the model number and specifications of the 
motor (to include efficiency, horsepower, open/closed, and number of 
poles) and the drive kit, including settings, associated with that 
specific motor that were used to determine the certified rating; and 
which, if any, special features were included in rating the basic 
model. Additionally, upon DOE request, the manufacturer must provide a 
layout of the system set-up for testing including charging instructions 
consistent with the installation manual.

0
6. Amend Sec.  429.70 by:
0
a. Revising the paragraph (c) heading, and paragraph (c)(1) 
introductory text;
0
b. Revising the tables in paragraphs (c)(2)(iv) and (c)(5)(vi)(B); and
0
c. Adding paragraph (l).
    The revisions and addition read as follows:


Sec.  429.70  Alternative methods for determining energy efficiency and 
energy use.

* * * * *
    (c) Alternative efficiency determination method (AEDM) for 
commercial HVAC & WH products (excluding air-cooled, three-phase, small 
commercial package air conditioning and heating equipment with a 
cooling capacity of less than 65,000 Btu/h and air-cooled, three-phase, 
variable refrigerant flow multi-split air conditioners and heat pumps 
with less than 65,000 Btu/h cooling capacity), and commercial 
refrigerators, freezers, and refrigerator-freezers--(1) Criteria an 
AEDM must satisfy. A manufacturer may not apply an AEDM to a basic 
model to determine its efficiency pursuant to this section unless:
* * * * *
    (2) * * *
    (iv) * * *

                     Table 1 to Paragraph (c)(2)(iv)
------------------------------------------------------------------------
                                       Minimum number of distinct models
          Validation class               that must be tested per AEDM
------------------------------------------------------------------------
                 (A) Commercial HVAC validation classes
------------------------------------------------------------------------
Air-Cooled, Split and Packaged ACs    2 Basic Models.
 and HPs Greater than or Equal to
 65,000 Btu/h Cooling Capacity and
 Less than 760,000 Btu/h Cooling
 Capacity.
Water-Cooled, Split and Packaged ACs  2 Basic Models.
 and HPs, All Cooling Capacities.
Evaporatively-Cooled, Split and       2 Basic Models.
 Packaged ACs and HPs, All
 Capacities.
Water-Source HPs, All Capacities....  2 Basic Models.
Single Package Vertical ACs and HPs.  2 Basic Models.
Packaged Terminal ACs and HPs.......  2 Basic Models.
Air-Cooled, Variable Refrigerant      2 Basic Models.
 Flow ACs and HPs Greater than or
 Equal to 65,000 Btu/h Cooling
 Capacity.
Water-Cooled, Variable Refrigerant    2 Basic Models.
 Flow ACs and HPs.
Computer Room Air Conditioners, Air   2 Basic Models.
 Cooled.
Computer Room Air Conditioners,       2 Basic Models.
 Water-Cooled.
Direct Expansion-Dedicated Outdoor    2 Basic Models.
 Air Systems, Air-cooled or Air-
 source Heat Pump, Without
 Ventilation Energy Recovery Systems.
Direct Expansion-Dedicated Outdoor    2 Basic Models.
 Air Systems, Air-cooled or Air-
 source Heat Pump, With Ventilation
 Energy Recovery Systems.
Direct Expansion-Dedicated Outdoor    2 Basic Models.
 Air Systems, Water-cooled, Water-
 source Heat Pump, or Ground Source
 Closed-loop Heat Pump, Without
 Ventilation Energy Recovery Systems.
Direct Expansion-Dedicated Outdoor    2 Basic Models.
 Air Systems, Water-cooled, Water-
 source Heat Pump, or Ground Source
 Closed-loop Heat Pump, With
 Ventilation Energy Recovery Systems.
------------------------------------------------------------------------
             (B) Commercial water heater validation classes
------------------------------------------------------------------------
Gas-fired Water Heaters and Hot       2 Basic Models.
 Water Supply Boilers Less than 10
 Gallons.

[[Page 77322]]

 
Gas-fired Water Heaters and Hot       2 Basic Models.
 Water Supply Boilers Greater than
 or Equal to 10 Gallons.
Oil-fired Water Heaters and Hot       2 Basic Models.
 Water Supply Boilers Less than 10
 Gallons.
Oil-fired Water Heaters and Hot       2 Basic Models.
 Water Supply Boilers Greater than
 or Equal to 10 Gallons.
Electric Water Heaters..............  2 Basic Models.
Heat Pump Water Heaters.............  2 Basic Models.
Unfired Hot Water Storage Tanks.....  2 Basic Models.
------------------------------------------------------------------------
           (C) Commercial packaged boilers validation classes
------------------------------------------------------------------------
Gas-fired, Hot Water Only Commercial  2 Basic Models.
 Packaged Boilers.
Gas-fired, Steam Only Commercial      2 Basic Models.
 Packaged Boilers.
Gas-fired Hot Water/Steam Commercial  2 Basic Models.
 Packaged Boilers.
Oil-fired, Hot Water Only Commercial  2 Basic Models.
 Packaged Boilers.
Oil-fired, Steam Only Commercial      2 Basic Models.
 Packaged Boilers.
Oil-fired Hot Water/Steam Commercial  2 Basic Models.
 Packaged Boilers.
------------------------------------------------------------------------
                (D) Commercial furnace validation classes
------------------------------------------------------------------------
Gas-fired Furnaces..................  2 Basic Models.
Oil-fired Furnaces..................  2 Basic Models.
------------------------------------------------------------------------
        (E) Commercial refrigeration equipment validation classes
------------------------------------------------------------------------
Self-Contained Open Refrigerators...  2 Basic Models.
Self-Contained Open Freezers........  2 Basic Models.
Remote Condensing Open Refrigerators  2 Basic Models.
Remote Condensing Open Freezers.....  2 Basic Models.
Self-Contained Closed Refrigerators.  2 Basic Models.
Self-Contained Closed Freezers......  2 Basic Models.
Remote Condensing Closed              2 Basic Models.
 Refrigerators.
Remote Condensing Closed Freezers...  2 Basic Models.
------------------------------------------------------------------------
\1\ The minimum number of tests indicated above must be comprised of a
  transparent model, a solid model, a vertical model, a semi-vertical
  model, a horizontal model, and a service-over-the counter model, as
  applicable based on the equipment offering. However, manufacturers do
  not need to include all types of these models if it will increase the
  minimum number of tests that need to be conducted.

* * * * *
    (5) * * *
    (vi) * * *
    (B) * * *

                   Table 2 to Paragraph (c)(5)(vi)(B)
------------------------------------------------------------------------
                                                            Applicable
             Equipment                     Metric            tolerance
------------------------------------------------------------------------
Commercial Packaged Boilers.......  Combustion                 5% (0.05)
                                     Efficiency.               5% (0.05)
                                    Thermal Efficiency..
Commercial Water Heaters or Hot     Thermal Efficiency..       5% (0.05)
 Water Supply Boilers.              Standby Loss........       10% (0.1)
Unfired Storage Tanks.............  R-Value.............       10% (0.1)
Air-Cooled, Split and Packaged ACs  Energy Efficiency          5% (0.05)
 and HPs Greater than or Equal to    Ratio.                    5% (0.05)
 65,000 Btu/h Cooling Capacity and  Coefficient of             10% (0.1)
 Less than 760,000 Btu/h Cooling     Performance.
 Capacity.                          Integrated Energy
                                     Efficiency Ratio.
Water-Cooled, Split and Packaged    Energy Efficiency          5% (0.05)
 ACs and HPs, All Cooling            Ratio.                    5% (0.05)
 Capacities.                        Coefficient of             10% (0.1)
                                     Performance.
                                    Integrated Energy
                                     Efficiency Ratio.
Evaporatively-Cooled, Split and     Energy Efficiency          5% (0.05)
 Packaged ACs and HPs, All           Ratio.                    5% (0.05)
 Capacities.                        Coefficient of             10% (0.1)
                                     Performance.
                                    Integrated Energy
                                     Efficiency Ratio.
Water-Source HPs, All Capacities..  Energy Efficiency          5% (0.05)
                                     Ratio.                    5% (0.05)
                                    Coefficient of             10% (0.1)
                                     Performance.
                                    Integrated Energy
                                     Efficiency Ratio.
Single Package Vertical ACs and     Energy Efficiency          5% (0.05)
 HPs.                                Ratio.                    5% (0.05)
                                    Coefficient of
                                     Performance.
Packaged Terminal ACs and HPs.....  Energy Efficiency          5% (0.05)
                                     Ratio.                    5% (0.05)
                                    Coefficient of
                                     Performance.

[[Page 77323]]

 
Variable Refrigerant Flow ACs and   Energy Efficiency          5% (0.05)
 HPs (Excluding Air-Cooled, Three-   Ratio.                    5% (0.05)
 phase with Less than 65,000 Btu/h  Coefficient of             10% (0.1)
 Cooling Capacity).                  Performance.
                                    Integrated Energy
                                     Efficiency Ratio.
Computer Room Air Conditioners....  Sensible Coefficient       5% (0.05)
                                     of Performance.
Direct Expansion-Dedicated Outdoor  Integrated Seasonal        10% (0.1)
 Air Systems.                        Coefficient of            10% (0.1)
                                     Performance 2.
                                    Integrated Seasonal
                                     Moisture Removal
                                     Efficiency 2.
Commercial Warm-Air Furnaces......  Thermal Efficiency..       5% (0.05)
Commercial Refrigeration Equipment  Daily Energy               5% (0.05)
                                     Consumption.
------------------------------------------------------------------------

* * * * *
    (l) Alternate Efficiency Determination Method (AEDM) for air-
cooled, three-phase, small commercial package air conditioning and 
heating equipment with a cooling capacity of less than 65,000 Btu/h and 
air-cooled, three-phase, variable refrigerant flow multi-split air 
conditioners and heat pumps with less than 65,000 Btu/h cooling 
capacity.
    (1) Applicability. (i) For air-cooled, three-phase, small 
commercial package air conditioning and heating equipment with a 
cooling capacity of less than 65,000 Btu/h and air-cooled, three-phase, 
variable refrigerant flow multi-split air conditioners and heat pumps 
with a cooling capacity of less than 65,000 Btu/h subject to standards 
in terms of seasonal energy efficiency ratio (SEER) and heating 
seasonal performance factor (HSPF), representations with respect to the 
energy use or efficiency, including compliance certifications, are 
subject to the requirements in Sec.  429.70(c) of this title as it 
appeared in the 10 CFR parts 200-499 edition revised as of January 1, 
2021.
    (ii) For air-cooled, three-phase, small commercial package air 
conditioning and heating equipment with a cooling capacity of less than 
65,000 Btu/h and air-cooled, three-phase, variable refrigerant flow 
multi-split air conditioners and heat pumps with a cooling capacity of 
less than 65,000 Btu/h subject to standards in terms of seasonal energy 
efficiency ratio 2 (SEER2) and heating seasonal performance factor 2 
(HSPF2) metrics, representations with respect to the energy use or 
efficiency, including compliance certifications, are subject to the 
requirements in this section. If manufacturers choose to certify 
compliance with any standards in terms of SEER2 and HSPF2 prior to the 
applicable compliance date for those standards, the requirements of 
this section must be followed.
    (2) Criteria an AEDM must satisfy. A manufacturer may not apply an 
AEDM to an individual model/combination to determine its represented 
values (SEER2 and HSPF2, as applicable) pursuant to this section unless 
authorized pursuant to Sec.  429.67(e) and:
    (i) The AEDM is derived from a mathematical model that estimates 
the energy efficiency or energy consumption characteristics of the 
individual model or combination (SEER2 and HSPF2, as applicable) as 
measured by the applicable DOE test procedure; and
    (ii) The manufacturer has validated the AEDM in accordance with 
paragraph (i)(3) of this section.
    (3) Validation of an AEDM. For manufacturers whose models of air-
cooled, three-phase, small commercial package air conditioning and 
heating equipment with a cooling capacity of less than 65,000 Btu/h or 
air-cooled, three-phase, variable refrigerant flow multi-split air 
conditioners and heat pumps with a cooling capacity of less than 65,000 
Btu/h are otherwise identical to their central air conditioner and heat 
pump models (meaning differing only in phase or voltage of the 
electrical system and the phase or voltage of power input for which the 
motors and compressors are designed) and who have validated an AEDM for 
the otherwise identical central air conditioners and heat pumps under 
Sec.  429.70(e)(2), no additional validation is required. For 
manufacturers whose models of air-cooled, three-phase, small commercial 
package air conditioning and heating equipment with a cooling capacity 
of less than 65,000 Btu/h or air-cooled, three-phase, variable 
refrigerant flow multi-split air conditioners and heat pumps with a 
cooling capacity of less than 65,000 Btu/h who have not validated an 
AEDM for otherwise identical central air conditioners and heat pumps 
under Sec.  429.70(e)(2) must, before using an AEDM, validate the 
AEDM's accuracy and reliability as follows:
    (i) Minimum testing. The manufacturer must test a single unit each 
of two basic models in accordance with paragraph (i)(3)(iii) of this 
section. Using the AEDM, calculate the energy use or efficiency for 
each of the tested individual models/combinations within each basic 
model. Compare the represented value based on testing and the AEDM 
energy use or efficiency output according to paragraph (i)(3)(ii) of 
this section. The manufacturer is responsible for ensuring the accuracy 
and reliability of the AEDM and that their representations are 
appropriate and the models being distributed in commerce meet the 
applicable standards, regardless of the amount of testing required in 
this paragraph.
    (ii) Individual model/combination tolerances. This paragraph 
(i)(3)(ii) provides the tolerances applicable to individual models/
combinations rated using an AEDM.
    (A) The predicted represented values for each individual model/
combination calculated by applying the AEDM may not be more than four 
percent greater (for measures of efficiency) or less (for measures of 
consumption) than the values determined from the corresponding test of 
the individual model/combination.
    (B) The predicted energy efficiency or consumption for each 
individual model/combination calculated by applying the AEDM must meet 
or exceed the applicable federal energy conservation standard.
    (iii) Additional test unit requirements. (A) Each AEDM must be 
supported by test data obtained from physical tests of current 
individual models/combinations; and
    (B) Test results used to validate the AEDM must meet or exceed 
current, applicable Federal standards as specified in part 431 of this 
chapter; and
    (C) Each test must have been performed in accordance with the 
applicable DOE test procedure with which compliance is required at the 
time the individual models/combinations used for validation are 
distributed in commerce.
    (4) AEDM records retention requirements. If a manufacturer has used 
an AEDM to determine

[[Page 77324]]

representative values pursuant to this section, the manufacturer must 
have available upon request for inspection by the Department records 
showing:
    (i) The AEDM, including the mathematical model, the engineering or 
statistical analysis, and/or computer simulation or modeling that is 
the basis of the AEDM;
    (ii) Product information, complete test data, AEDM calculations, 
and the statistical comparisons from the units tested that were used to 
validate the AEDM pursuant to paragraph (i)(3) of this section; and
    (iii) Product information and AEDM calculations for each individual 
model/combination to which the AEDM has been applied.
    (5) Additional AEDM requirements. If requested by the Department, 
the manufacturer must:
    (i) Conduct simulations before representatives of the Department to 
predict the performance of particular individual models/combinations;
    (ii) Provide analyses of previous simulations conducted by the 
manufacturer; and/or
    (iii) Conduct certification testing of individual models or 
combinations selected by the Department.
    (6) AEDM verification testing. DOE may use the test data for a 
given individual model/combination generated pursuant to Sec.  429.104 
to verify the represented value determined by an AEDM as long as the 
following process is followed:
    (i) Selection of units. DOE will obtain one or more units for test 
from retail, if available. If units cannot be obtained from retail, DOE 
will request that a unit be provided by the manufacturer;
    (ii) Lab requirements. DOE will conduct testing at an independent, 
third-party testing facility of its choosing. In cases where no third-
party laboratory is capable of testing the equipment, testing may be 
conducted at a manufacturer's facility upon DOE's request.
    (iii) Testing. At no time during verification testing may the lab 
and the manufacturer communicate without DOE authorization. If, during 
test set-up or testing, the lab indicates to DOE that it needs 
additional information regarding a given individual model or 
combination in order to test in accordance with the applicable DOE test 
procedure, DOE may organize a meeting between DOE, the manufacturer, 
and the lab to provide such information.
    (iv) Failure to meet certified value. If an individual model/
combination tests worse than its certified value (i.e., lower than the 
certified efficiency value or higher than the certified consumption 
value) by more than 5 percent, or the test results in cooling capacity 
that is lower than its certified cooling capacity, DOE will notify the 
manufacturer. DOE will provide the manufacturer with all documentation 
related to the test set up, test conditions, and test results for the 
unit. Within the timeframe allotted by DOE, the manufacturer may 
present any and all claims regarding testing validity.
    (v) Tolerances. This paragraph specifies the tolerances DOE will 
permit when conducting verification testing.
    (A) For consumption metrics, the result from a DOE verification 
test must be less than or equal to 1.05 multiplied by the certified 
represented value.
    (B) For efficiency metrics, the result from a DOE verification test 
must be greater than or equal to 0.95 multiplied by the certified 
represented value.
    (vi) Invalid represented value. If, following discussions with the 
manufacturer and a retest where applicable, DOE determines that the 
verification testing was conducted appropriately in accordance with the 
DOE test procedure, DOE will issue a determination that the represented 
values for the basic model are invalid. The manufacturer must conduct 
additional testing and re-rate and re-certify the individual models/
combinations within the basic model that were rated using the AEDM 
based on all test data collected, including DOE's test data.
    (vii) AEDM use. This paragraph (i)(6)(vii) specifies when a 
manufacturer's use of an AEDM may be restricted due to prior invalid 
represented values.
    (A) If DOE has determined that a manufacturer made invalid 
represented values on individual models/combinations within two or more 
basic models rated using the manufacturer's AEDM within a 24-month 
period, the manufacturer must test the least efficient and most 
efficient individual model/combination within each basic model in 
addition to the individual model/combination specified in Sec.  
429.16(b)(2). The 24-month period begins with a DOE determination that 
a represented value is invalid through the process outlined in 
paragraphs (i)(6)(i) through (vi) of this section.
    (B) If DOE has determined that a manufacturer made invalid 
represented values on more than four basic models rated using the 
manufacturer's AEDM within a 24-month period, the manufacturer may no 
longer use an AEDM.
    (C) If a manufacturer has lost the privilege of using an AEDM, the 
manufacturer may regain the ability to use an AEDM by:
    (1) Investigating and identifying cause(s) for failures;
    (2) Taking corrective action to address cause(s);
    (3) Performing six new tests per basic model, a minimum of two of 
which must be performed by an independent, third-party laboratory from 
units obtained from retail to validate the AEDM; and
    (4) Obtaining DOE authorization to resume use of an AEDM.

0
7. Section 429.134 is amended by adding paragraph (y) to read as 
follows:


Sec.  429.134  Product-specific enforcement provisions.

* * * * *
    (y) Air-cooled, three-phase, small commercial package air 
conditioning and heating equipment with a cooling capacity of less than 
65,000 Btu/h and air-cooled, three-phase, variable refrigerant flow 
multi-split air conditioners and heat pumps with a cooling capacity of 
less than 65,000 Btu/h. The following provisions apply for assessment 
and enforcement testing of models subject to standards in terms of 
SEER2 and HSPF2 (as applicable).
    (1) Verification of cooling capacity. The cooling capacity of each 
tested unit of the individual model (for single-package units) or 
individual combination (for split systems) will be measured pursuant to 
the test requirements of appendix F1 to subpart F of part 431. The mean 
of the cooling capacity measurement(s) (either the measured cooling 
capacity for a single unit sample or the average of the measured 
cooling capacities for a multiple unit sample) will be used to 
determine the applicable standards for purposes of compliance.
    (2) Verification of CD value. (i) For models other than models of 
outdoor units with no match, if manufacturers certify that they did not 
conduct the optional tests to determine the C\c\ and/or C\h\ value for 
an individual model (for single-package systems) or individual 
combination (for split systems), as applicable, the default value of 
C\c\ and/or C\h\ will be used as the basis for calculation of SEER2 or 
HSPF2 for each unit tested. If manufacturers certify that they 
conducted the optional tests to determine the value of C\c\ and/or C\h\ 
for an individual model (for single-package systems) or individual 
combination (for split systems), as applicable, the value of C\c\ and/
or C\h\ will be measured pursuant to the test requirements of appendix 
F1 to subpart F of part 431 for each unit tested. The result for each 
unit tested (either the tested value or the default value, as selected 
according to the criteria for the cyclic test in section

[[Page 77325]]

4 of appendix F1 to subpart F of part 431) will be used as the basis 
for calculation of SEER2 or HSPF2 for that unit.
    (ii) For models of outdoor units with no match, DOE will use the 
default value of Cc and/or Ch specified in the test procedure in 
appendix F1 to subpart F of part 431.

PART 431--ENERGY EFFICIENCY PROGRAM FOR CERTAIN COMMERCIAL AND 
INDUSTRIAL EQUIPMENT

0
8. The authority citation for part 431 continues to read as follows:

    Authority:  42 U.S.C. 6291-6317; 28 U.S.C. 2461 note.


0
9. Amend Sec.  431.92 in the definition of Basic model, by revising 
paragraphs (5) and (7), and adding paragraph (8) to read as follows:


Sec.  431.92  Definitions concerning commercial air conditioners and 
heat pumps.

* * * * *
    Basic model includes:
* * * * *
    (5) Small, large, and very large air-cooled or water-cooled 
commercial package air conditioning and heating equipment (excluding 
air-cooled, three-phase, small commercial package air conditioning and 
heating equipment with a cooling capacity of less than 65,000 Btu/h 
cooling capacity) means all units manufactured by one manufacturer 
within a single equipment class, having the same or comparably 
performing compressor(s), heat exchangers, and air moving system(s) 
that have a common ``nominal'' cooling capacity.
* * * * *
    (7) Variable refrigerant flow systems (excluding air-cooled, three-
phase, variable refrigerant flow air conditioners and heat pumps with a 
cooling capacity of less than 65,000 Btu/h) means all units 
manufactured by one manufacturer within a single equipment class, 
having the same primary energy source (e.g., electric or gas), and 
which have the same or comparably performing compressor(s) that have a 
common ``nominal'' cooling capacity and the same heat rejection medium 
(e.g., air or water) (includes VRF water source heat pumps).
    (8) Air-cooled, three-phase, small commercial package air 
conditioning and heating equipment with a cooling capacity of less than 
65,000 Btu/h and air-cooled, three-phase, variable refrigerant flow 
multi-split air conditioners and heat pumps with a cooling capacity of 
less than 65,000 Btu/h means all units manufactured by one 
manufacturer, having the same primary energy source, and, which have 
essentially identical electrical, physical, and functional (or 
hydraulic) characteristics that affect energy consumption, energy 
efficiency, water consumption, or water efficiency; where essentially 
identical electrical, physical, and functional (or hydraulic) 
characteristics means:
    (i) For split systems manufactured by outdoor unit manufacturers 
(OUMs): all individual combinations having the same model of outdoor 
unit, which means comparably performing compressor(s) [a variation of 
no more than five percent in displacement rate (volume per time) as 
rated by the compressor manufacturer, and no more than five percent in 
capacity and power input for the same operating conditions as rated by 
the compressor manufacturer], outdoor coil(s) [no more than five 
percent variation in face area and total fin surface area; same fin 
material; same tube material], and outdoor fan(s) [no more than ten 
percent variation in airflow and no more than twenty percent variation 
in power input];
    (ii) For split systems having indoor units manufactured by 
independent coil manufacturers (ICMs): all individual combinations 
having comparably performing indoor coil(s) [plus or minus one square 
foot face area, plus or minus one fin per inch fin density, and the 
same fin material, tube material, number of tube rows, tube pattern, 
and tube size]; and
    (iii) For single-package systems: all individual models having 
comparably performing compressor(s) [no more than five percent 
variation in displacement rate (volume per time) rated by the 
compressor manufacturer, and no more than five percent variations in 
capacity and power input rated by the compressor manufacturer 
corresponding to the same compressor rating conditions], outdoor 
coil(s) and indoor coil(s) [no more than five percent variation in face 
area and total fin surface area; same fin material; same tube 
material], outdoor fan(s) [no more than ten percent variation in 
outdoor airflow], and indoor blower(s) [no more than ten percent 
variation in indoor airflow, with no more than twenty percent variation 
in fan motor power input];
    (iv) Except that,
    (A) For single-package systems and single-split systems, 
manufacturers may instead choose to make each individual model/
combination its own basic model provided the testing and represented 
value requirements in 10 CFR 429.67 of this chapter are met; and
    (B) For multi-split, multi-circuit, and multi-head mini-split 
combinations, a basic model may not include both individual small-duct, 
high velocity (SDHV) combinations and non-SDHV combinations even when 
they include the same model of outdoor unit. The manufacturer may 
choose to identify specific individual combinations as additional basic 
models.
* * * * *

0
10. Amend Sec.  431.95 by:
0
a. Revising paragraph (b)(1);
0
b. Redesignating paragraphs (b)(2) through (8) as (b)(3) through (9);
0
c. Adding new paragraph (b)(2);
0
d. Revising newly redesignated paragraph (b)(8); and
0
e. Revising paragraph (c)(2).
    The revisions and addition read as follows:


Sec.  431.95  Materials incorporated by reference.

* * * * *
    (b) * * *
    (1) ANSI/AHRI Standard 210/240-2008 (AHRI 210/240-2008), 2008 
Standard for Performance Rating of Unitary Air-Conditioning & Air-
Source Heat Pump Equipment, approved by ANSI on October 27, 2011, and 
updated by addendum 1 in June 2011 and addendum 2 in March 2012; IBR 
approved for Sec.  431.96 and appendix F to this subpart.
    (2) AHRI Standard 210/240-2023 (AHRI 210/240-2023), 2023 Standard 
for Performance Rating of Unitary Air-conditioning & Air-source Heat 
Pump Equipment, copyright May 2020; IBR approved for appendix F1 to 
this subpart.
* * * * *
    (8) ANSI/AHRI Standard 1230-2010 (AHRI 1230-2010), 2010 Standard 
for Performance Rating of Variable Refrigerant Flow (VRF) Multi-Split 
Air-Conditioning and Heat Pump Equipment, approved August 2, 2010, and 
updated by addendum 1 in March 2011; IBR approved for Sec.  431.96 and 
appendices D and F to this subpart.
    (c) * * *
    (2) ANSI/ASHRAE Standard 37-2009 (``ANSI/ASHRAE 37-2009''), Methods 
of Testing for Rating Electrically Driven Unitary Air-Conditioning and 
Heat Pump Equipment, ASHRAE approved June 24, 2009; IBR approved for 
Sec.  431.96 and appendices A, B, D1, F1, G, and G1 to this subpart.
* * * * *

0
11. Amend Sec.  431.96 by revising Table 1 to paragraph (b), to read as 
follows:

[[Page 77326]]

Sec.  431.96  Uniform test method for the measurement of energy 
efficiency of commercial air conditioners and heat pumps.

* * * * *
    (b) * * *

                                Table 1 to Paragraph (b)--Test Procedures for Commercial Air Conditioners and Heat Pumps
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                                      Additional test
                                                               Cooling capacity or                                Use tests,        procedure provisions
           Equipment type                   Category            moisture  removal      Energy efficiency       conditions, and      as indicated in the
                                                                  capacity \2\             descriptor         procedures \1\ in     listed paragraphs of
                                                                                                                                        this section
--------------------------------------------------------------------------------------------------------------------------------------------------------
Small Commercial Package Air-        Air-Cooled, 3-Phase,    <65,000 Btu/h.........  SEER and HSPF........  Appendix F to this     None.
 Conditioning and Heating Equipment.  AC and HP.                                                             subpart \3\.
                                                                                     SEER2 and HSPF2......  Appendix F1 to this    None.
                                                                                                             subpart \3\.
                                     Air-Cooled AC and HP..  >=65,000 Btu/h and      EER, IEER, and COP...  Appendix A of this     None.
                                                              <135,000 Btu/h.                                subpart.
                                     Water-Cooled and        <65,000 Btu/h.........  EER..................  AHRI 210/240-2008      Paragraphs (c) and
                                      Evaporatively-Cooled                                                   (omit section 6.5).    (e).
                                      AC.
                                                             >=65,000 Btu/h and      EER..................  AHRI 340/360-2007      Paragraphs (c) and
                                                              <135,000 Btu/h.                                (omit section 6.3).    (e).
                                     Water-Source HP.......  <135,000 Btu/h........  EER and COP..........  ISO Standard 13256-1.  Paragraph (e).
Large Commercial Package Air-        Air-Cooled AC and HP..  >=135,000 Btu/h and     EER, IEER and COP....  Appendix A to this     None.
 Conditioning and Heating Equipment.                          <240,000 Btu/h.                                subpart.
                                     Water-Cooled and        >=135,000 Btu/h and     EER..................  AHRI 340/360-2007      Paragraphs (c) and
                                      Evaporatively-Cooled    <240,000 Btu/h.                                (omit section 6.3).    (e).
                                      AC.
Very Large Commercial Package Air-   Air-Cooled AC and HP..  >=240,000 Btu/h and     EER, IEER and COP....  Appendix A to this     None.
 Conditioning and Heating Equipment.                          <760,000 Btu/h.                                subpart.
                                     Water-Cooled and        >=240,000 Btu/h and     EER..................  AHRI 340/360-2007      Paragraphs (c) and
                                      Evaporatively-Cooled    <760,000 Btu/h.                                (omit section 6.3).    (e).
                                      AC.
Packaged Terminal Air Conditioners   AC and HP.............  <760,000 Btu/h........  EER and COP..........  Paragraph (g) of this  Paragraphs (c), (e),
 and Heat Pumps.                                                                                             section.               and (g).
Computer Room Air Conditioners.....  AC....................  <65,000 Btu/h.........  SCOP.................  ASHRAE 127-2007 (omit  Paragraphs (c) and
                                                                                                             section 5.11).         (e).
                                                             >=65,000 Btu/h and      SCOP.................  ASHRAE 127-2007 (omit  Paragraphs (c) and
                                                              <760,000 Btu/h.                                section 5.11).         (e).
Variable Refrigerant Flow Multi-     AC....................  <65,000 Btu/h (3-       SEER.................  Appendix F to this     None.
 split Systems.                                               phase).                                        subpart \3\.
                                                                                     SEER2................  Appendix F1 to this    None.
                                                                                                             subpart \3\.
Variable Refrigerant Flow Multi-     HP....................  <65,000 Btu/h (3-       SEER and HSPF........  Appendix F to this     None.
 split Systems, Air-cooled.                                   phase).                                        subpart \3\.
                                                                                     SEER2 and HSPF2......  Appendix F1 to this    None.
                                                                                                             subpart \3\.
Variable Refrigerant Flow Multi-     AC and HP.............  >=65,000 Btu/h and      EER and COP..........  Appendix D of this     None.
 split Systems, Air-cooled.                                   <760,000 Btu/h.                                subpart \3\.
                                                             >=65,000 Btu/h and      IEER and COP.........  Appendix D1 of this    None.
                                                              <760,000 Btu/h.                                subpart \3\.
Variable Refrigerant Flow Multi-     HP....................  <760,000 Btu/h........  EER and COP..........  Appendix D of this     None.
 split Systems, Water-source.                                                                                subpart \3\.
                                                             <760,000 Btu/h........  IEER and COP.........  Appendix D1 of this    None.
                                                                                                             subpart \3\.
Single Package Vertical Air          AC and HP.............  <760,000 Btu/h........  EER and COP..........  Appendix G to this     None.
 Conditioners and Single Package                                                                             subpart \3\.
 Vertical Heat Pumps.

[[Page 77327]]

 
                                                                                     EER, IEER, and COP...  Appendix G1 to this    None.
                                                                                                             subpart \3\.
Direct Expansion-Dedicated Outdoor   All...................  <324 lbs. of moisture   ISMRE2 and ISCOP2....  Appendix B of this     None.
 Air Systems.                                                 removal/hr.                                    subpart.
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ Incorporated by reference; see Sec.   431.95.
\2\ Moisture removal capacity applies only to direct expansion-dedicated outdoor air systems
\3\ For equipment with multiple appendices listed in table 1, consult the notes at the beginning of those appendices to determine the applicable
  appendix to use for testing.

* * * * *

Appendix E to Subpart F of Part 431 [Reserved]

0
12. Add reserved appendix E to subpart F of part 431.

0
13. Add appendix F to subpart F of part 431 to read as follows:

Appendix F to Subpart F of Part 431--Uniform Test Method for the 
Measurement of Energy Consumption of Air-Wooled, Three-Phase, Small 
Commercial Package Air Conditioning and Heating Equipment With a 
Cooling Capacity of Less Than 65,000 Btu/h and Air-Cooled, Three-Phase, 
Variable Refrigerant Flow Multi-Split Air Conditioners and Heat Pumps 
With a Cooling Capacity of Less Than 65,000 Btu/h

    Note: Manufacturers must use the results of testing under this 
appendix to determine compliance with the relevant standard from 
Sec.  431.97 as that standard appeared in the January 1, 2022, 
edition of 10 CFR parts 200-499. Specifically, representations must 
be based upon results generated either under this appendix or under 
10 CFR 431.96 as it appeared in the 10 CFR parts 200-499 edition 
revised as of January 1, 2021.
    For any amended standards for air-cooled, three-phase, small 
commercial package air conditioning and heating equipment with a 
cooling capacity of less than 65,000 Btu/h and air-cooled, three-
phase, variable refrigerant flow multi-split air conditioners and 
heat pumps with a cooling capacity of less than 65,000 Btu/h that 
rely on SEER2 and HSPF2 published after January 1, 2021, 
manufacturers must use the results of testing under appendix F1 to 
determine compliance. Representations related to energy consumption 
must be made in accordance with the appropriate appendix that 
applies (i.e., appendices F or F1) when determining compliance with 
the relevant standard. Manufacturers may also use appendix F1 to 
certify compliance with any amended standards that rely on SEER2 and 
HSPF2 prior to the applicable compliance date for those standards.

1. Incorporation by Reference

    DOE incorporated by reference in Sec.  431.95, the entire 
standard for ANSI/AHRI 210/240-2008 and ANSI/AHRI 1230-2010. 
However, certain enumerated provisions of those standards, as set 
forth in this section 1, are inapplicable. To the extent there is a 
conflict between the terms or provisions of a referenced industry 
standard and the CFR, the CFR provisions control.
    1.1 ANSI/AHRI 210/240-2008:
    (a) Section 6.5--Tolerances
    (b) Reserved.
    1.2 ANSI/AHRI 1230-2010:
    (a) Section 5.1.2--Manufacturer involvement
    (b) Section 6.6--Verification testing and uncertainty

2. General

    2.1 Air-cooled, three-phase, small commercial package air 
conditioning and heating equipment with a cooling capacity of less 
than 65,000 Btu/h. Determine the seasonal energy efficiency ratio 
(SEER) and heating seasonal performance factor (HSPF) (as 
applicable) in accordance with ANSI/AHRI 210/240-2008. Sections 3 to 
6 of this appendix provide additional instructions for determining 
SEER and HSPF.
    2.2 Air-cooled, three-phase, variable refrigerant flow multi-
split air conditioners and heat pumps with a cooling capacity of 
less than 65,000 Btu/h. Determine the SEER and HSPF (as applicable) 
in accordance with ANSI/AHRI 1230-2010.
    Sections 3 through 6 of this appendix provide additional 
instructions for determining SEER and HSPF.
    3. Optional break-in period. Manufacturers may optionally 
specify a ``break-in'' period, not to exceed 20 hours, to operate 
the equipment under test prior to conducting the test method 
specified in this appendix. A manufacturer who elects to use an 
optional compressor break-in period in its certification testing 
should record this period's duration as part of the information in 
the supplemental testing instructions under 10 CFR 429.43.
    4. Additional provisions for equipment set-up. The only 
additional specifications that may be used in setting up the basic 
model for test are those set forth in the installation and operation 
manual shipped with the unit. Each unit should be set up for test in 
accordance with the manufacturer installation and operation manuals. 
Sections 3.1 through 3.3 of this appendix provide specifications for 
addressing key information typically found in the installation and 
operation manuals.
    4.1. If a manufacturer specifies a range of superheat, sub-
cooling, and/or refrigerant pressure in its installation and 
operation manual for a given basic model, any value(s) within that 
range may be used to determine refrigerant charge or mass of 
refrigerant, unless the manufacturer clearly specifies a rating 
value in its installation and operation manual, in which case the 
specified rating value shall be used.
    4.2. The airflow rate used for testing must be that set forth in 
the installation and operation manuals being shipped to the 
commercial customer with the basic model and clearly identified as 
that used to generate the DOE performance ratings. If a rated 
airflow value for testing is not clearly identified, a value of 400 
standard cubic feet per minute (scfm) per ton shall be used.
    4.3. For air-cooled, three-phase, variable refrigerant flow 
multi-split air conditioners and heat pumps with a cooling capacity 
of less than 65,000 Btu/h, the test set-up and the fixed compressor 
speeds (i.e., the maximum, minimum, and any intermediate speeds used 
for testing) should be recorded and maintained as part of the test 
data underlying the certified ratings that is required to be 
maintained under 10 CFR 429.71.
    5. Refrigerant line length corrections for air-cooled, three-
phase, variable refrigerant flow multi-split air conditioners and 
heat pumps with a cooling capacity of less than 65,000 Btu/h. For 
test setups where it is physically impossible for the laboratory to 
use the required line length listed in Table 3 of ANSI/AHRI 1230-
2010, then the actual refrigerant line length used by the laboratory 
may exceed the required length and the following cooling capacity 
correction factors are applied:

------------------------------------------------------------------------
                                                               Cooling
  Piping length beyond  minimum, X    Piping length beyond     capacity
                (ft)                     minimum, Y  (m)      correction
                                                                 (%)
------------------------------------------------------------------------
0>X <=20...........................  0>Y <=6.1.............            1
20>X <=40..........................  6.1>Y <=12.2..........            2
40>X <=60..........................  12.2>Y <=18.3.........            3
60>X <=80..........................  18.3>Y <=24.4.........            4
80>X <=100.........................  24.4>Y <=30.5.........            5

[[Page 77328]]

 
100 >X <=120.......................  30.5>Y <=36.6.........            6
------------------------------------------------------------------------

    6. Manufacturer involvement in assessment or enforcement testing 
for air-cooled, three-phase, variable refrigerant flow multi-split 
air conditioners and heat pumps with a cooling capacity of less than 
65,000 Btu/h. A manufacturer's representative will be allowed to 
witness assessment and/or enforcement testing. The manufacturer's 
representative will be allowed to inspect and discuss set-up only 
with a DOE representative and adjust only the modulating components 
during testing in the presence of a DOE representative that are 
necessary to achieve steady-state operation. Only previously 
documented specifications for set-up as specified under sections 3 
and 4 of this appendix will be used.

0
14. Add appendix F1 to subpart F of part 431 to read as follows:

Appendix F1 to Subpart F of Part 431--Uniform Test Method for the 
Measurement of Energy Consumption of Air-Cooled, Three-Phase, Small 
Commercial Package Air Conditioning and Heating Equipment With a 
Cooling Capacity of Less Than 65,000 Btu/h and Air-Cooled, Three-Phase, 
Variable Refrigerant Flow Multi-Split Air Conditioners and Heat Pumps 
With a Cooling Capacity of Less Than 65,000 Btu/h

    Note: Manufacturers must use the results of testing under this 
appendix to determine compliance with any amended standards for air-
cooled, three-phase, small commercial package air conditioning and 
heating equipment with a cooling capacity of less than 65,000 Btu/h 
and air-cooled, three-phase, variable refrigerant flow multi-split 
air conditioners and heat pumps with a cooling capacity of less than 
65,000 Btu/h provided in Sec.  431.97 that are published after 
January 1, 2021, and that rely on seasonal energy efficiency ratio 2 
(SEER2) and heating seasonal performance factor 2 (HSPF2). 
Representations related to energy consumption must be made in 
accordance with the appropriate appendix that applies (i.e., 
appendices F or F1) when determining compliance with the relevant 
standard. Manufacturers may also use this appendix to certify 
compliance with any amended standards that rely on SEER2 and HSPF2 
prior to the applicable compliance date for those standards.
    1. Incorporation by Reference. DOE incorporated by reference in 
Sec.  431.95, the entire standard for AHRI 210/240-2023 and ANSI/
ASHRAE 37-2009. However, certain enumerated provisions of AHRI 210/
240-2023 and ANSI/ASHRAE 37-2009, as set forth in this section 1, 
are inapplicable. To the extent there is a conflict between the 
terms or provisions of a referenced industry standard and the CFR, 
the CFR provisions control. Any subsequent amendment to a referenced 
document by the standard-setting organization will not affect the 
test procedure in this appendix, unless and until the test procedure 
is amended by DOE.
    1.1. AHRI 210/240-2023:
    (a) Section 6 Rating Requirements--6.1 Standard Ratings--6.1.8 
Tested Combinations or Tested Units

(b) Section 6 Rating Requirements--6.2 Application Ratings
(c) Section 6 Rating Requirements--6.4 Ratings
(d) Section 6 Rating Requirements--6.5 Uncertainty and Variability
(e) Section 7--Minimum Data Requirements for Published Ratings
(f) Section 8--Operating Requirements
(g) Section 9--Marking and Nameplate Data
(h) Section 10--Conformance Conditions
(i) Appendix C--Certification of Laboratory Facilities Used to 
Determine Performance of Unitary Air-Conditioning & Air-Source Heat 
Pump Equipment--Informative
(j) Appendix F--ANSI/ASHRAE Standard 116-2010 Clarifications/
Exceptions--Normative--F15.2 and F17
(k) Appendix G--Unit Configuration for Standard Efficiency 
Determination--Normative
(l) Appendix H--Off-Mode Testing--Normative
(m) Appendix I Verification Testing--Normative

    1.2. ANSI/ASHRAE 37-2009:

(a) Section 1--Purpose
(b) Section 2--Scope
(c) Section 4--Classification

    2. General. Determine the seasonal energy efficiency ratio 2 
(SEER2) and heating seasonal performance factor 2 (HSPF2) (as 
applicable) in accordance with AHRI 210/240-2023 and ANSI/ASHRAE 37-
2009. Sections 3 and 4 to this appendix provide additional 
instructions for determining SEER2 and HSPF2.
    3. Energy Measurement Accuracy. The Watt-hour (W[sdot]h) 
measurement system(s) shall be accurate within  0.5 
percent or 0.5 W[sdot]h, whichever is greater, for both ON and OFF 
cycles. If two measurement systems are used, then the meters shall 
be switched within 15 seconds of the start of the OFF cycle and 
switched within 15 seconds prior to the start of the ON cycle.
    4. Cycle Stability Requirements. Conduct three complete 
compressor OFF/ON cycles. Calculate the degradation coefficient CD 
for each complete cycle. If all three CD values are within 0.02 of 
the average CD then stability has been achieved, and the highest CD 
value of these three shall be used. If stability has not been 
achieved, conduct additional cycles, up to a maximum of eight cycles 
total, until stability has been achieved between three consecutive 
cycles. Once stability has been achieved, use the highest CD value 
of the three consecutive cycles that establish stability. If 
stability has not been achieved after eight cycles, use the highest 
CD from cycle one through cycle eight, or the default CD, whichever 
is lower.

[FR Doc. 2022-26418 Filed 12-15-22; 8:45 am]
BILLING CODE 6450-01-P