[Federal Register Volume 88, Number 69 (Tuesday, April 11, 2023)]
[Rules and Regulations]
[Pages 21816-21842]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2023-06760]



[[Page 21815]]

Vol. 88

Tuesday,

No. 69

April 11, 2023

Part III





Department of Energy





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10 CFR Parts 429 and 431





Energy Conservation Program: Test Procedure for Computer Room Air 
Conditioners; Final Rule

  Federal Register / Vol. 88, No. 69 / Tuesday, April 11, 2023 / Rules 
and Regulations  

[[Page 21816]]


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DEPARTMENT OF ENERGY

10 CFR Parts 429 and 431

[EERE-2021-BT-TP-0017]
RIN 1904-AE45


Energy Conservation Program: Test Procedure for Computer Room Air 
Conditioners

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'') is publishing a final 
rule to amend its test procedure for computer room air conditioners 
(``CRACs''). DOE is incorporating by reference the latest version of 
the relevant industry consensus test standard, AHRI 1360-2022. DOE is 
also adopting the net sensible coefficient of performance (``NSenCOP'') 
metric in its test procedures for CRACs. Additionally, DOE is amending 
certain provisions for representations and enforcement.

DATES: The effective date of this rule is May 11, 2023. The final rule 
changes will be mandatory for CRAC equipment testing starting April 5, 
2024. The incorporation by reference of certain materials listed in 
this rule is approved by the Director of the Federal Register on May 
11, 2023.

ADDRESSES: The docket, which includes Federal Register notices, public 
meeting attendee lists and transcripts, comments, and other supporting 
documents/materials, is available for review at www.regulations.gov 
under docket number EERE-2021-BT-TP-0017. 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-2021-BT-TP-0017. 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-5B, 
1000 Independence Avenue SW, Washington, DC 20585-0121. Telephone: 
(202) 586-7335. Email: [email protected].
    Mr. Eric Stas, U.S. Department of Energy, Office of the General 
Counsel, GC-33, 1000 Independence Avenue SW, Washington, DC 20585-0121. 
Telephone: (202) 586-5827. Email: [email protected].

SUPPLEMENTARY INFORMATION: DOE incorporates by reference the following 
industry standards:
    AHRI Standard 1360-2022 (I-P), ``2022 Standard for Performance 
Rating of Computer and Data Processing Room Air Conditioners'', 
copyright 2022 (``AHRI 1360-2022'') into parts 429 and 431.
    ANSI/ASHRAE Standard 37-2009, ``Methods of Testing for Rating 
Electrically Driven Unitary Air-Conditioning and Heat Pump Equipment,'' 
approved June 24, 2009 (``ANSI/ASHRAE 37-2009'') into part 431.
    ASHRAE Standard 127-2007, ``Method of Testing for Rating Computer 
and Data Processing Room Unitary Air Conditioners'', approved June 28, 
2007 (``ANSI/ASHRAE 127-2007'') into part 431.
    ANSI/ASHRAE 127-2020, ``Method of Testing for Rating Air-
Conditioning Units Serving Data Center (DC) and Other Information 
Technology Equipment (ITE) Spaces'', ANSI-approved November 30, 2020 
(``ANSI/ASHRAE 127-2020'') into part 431.
    Copies of AHRI 1360-2022 can be obtained from the Air-Conditioning, 
Heating, and Refrigeration Institute (``AHRI''), 2311 Wilson Blvd., 
Suite 400, Arlington, VA 22201, (703) 524-8800, or online at: 
www.ahrinet.org.
    Copies of ANSI/ASHRAE 37-2009, ANSI/ASHRAE 127-2007, and ANSI/
ASHRAE 127-2020, can be obtained from the American National Standards 
Institute (``ANSI''), 25 W 43rd Street, 4th Floor, New York, NY 10036, 
(212) 642-4900, or online at: webstore.ansi.org/.
    For a further discussion of these standards, see section IV.N of 
this document.

Table of Contents

I. Authority and Background
    A. Authority
    B. Background
II. Synopsis of the Final Rule
III. Discussion
    A. Scope of Applicability
    B. Revised Organization of the CRAC Test Procedure
    C. Updates to Industry Test Standards
    D. Definitions
    1. CRAC Definition
    2. CRAC Configuration Definitions
    E. Metric
    1. NSenCOP
    2. Integrated Efficiency Metric
    3. Part-Load Operation and Air Circulation Mode
    4. Controls Verification Procedure
    F. Configuration of Unit Under Test
    1. Background and Summary
    2. Approach for Exclusion of Certain Components
    3. Non-Standard Indoor Fan Motors
    G. Represented Values
    1. Multiple Refrigerants
    2. Net Sensible Cooling Capacity
    3. Validation Class for Glycol-Cooled CRACs
    H. Effective and Compliance Dates
    I. 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
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'') is authorized to 
establish and amend energy conservation standards and test procedures. 
(42 U.S.C. 6311(1)(B)-(D)) Commercial package air conditioning and 
heating equipment includes computer room air conditioners (``CRACs'') 
as an equipment category. DOE's test procedures for CRACs are currently 
prescribed at title 10 of the Code of Federal Regulations (``CFR''), 
Table 1 to Sec.  431.96. The following sections discuss DOE's authority 
to establish and amend test procedures for CRACs and relevant 
background information regarding DOE's consideration of amendments to 
the test procedures for this equipment.

[[Page 21817]]

A. Authority

    The Energy Policy and Conservation Act, as amended (``EPCA''),\1\ 
among other things, authorizes DOE to regulate the energy efficiency of 
a number of consumer products and certain industrial equipment. (42 
U.S.C. 6291-6317) Title III, Part C \2\ of EPCA, Public Law 94-163 (42 
U.S.C. 6311-6317, as codified), 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 covered equipment includes small, 
large, and very large commercial package air conditioning and heating 
equipment. (42 U.S.C. 6311(1)(B)-(D)) Commercial package air 
conditioning and heating equipment includes CRACs, which are the 
subject of this final rule.
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    \1\ 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.
    \2\ 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) Federal energy conservation 
standards, and (4) certification and enforcement procedures. Relevant 
provisions of EPCA include definitions (42 U.S.C. 6311), energy 
conservation standards (42 U.S.C. 6313), test procedures (42 U.S.C. 
6314), labeling provisions (42 U.S.C. 6315), and the authority to 
require information and reports from manufacturers (42 U.S.C. 6316).
    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) and (b); 42 U.S.C. 6297) DOE may, however, grant waivers 
of Federal preemption in limited circumstances 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 also sets forth the criteria and 
procedures DOE must follow when prescribing or amending test procedures 
for covered equipment. Specifically, 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 (or class thereof) during a representative average 
use cycle and requires that test procedures not be unduly burdensome to 
conduct. (42 U.S.C. 6314(a)(2))
    EPCA requires that the test procedures for commercial package air 
conditioning and heating equipment (of which CRACs are a category) 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 such an industry test procedure is 
amended, DOE must update 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 seven years, DOE 
evaluate test procedures for each type of covered equipment, including 
CRACs, 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)-(3))
    In addition, if DOE determines that a test procedure amendment is 
warranted, the Department must publish proposed test procedures 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 arguments on the proposed test procedures. (42 U.S.C. 6314(b)) If 
DOE determines that test procedure revisions are not appropriate, DOE 
must publish in the Federal Register its determination not to amend the 
test procedures. (42 U.S.C. 6314(a)(1)(A)(ii))
    DOE is publishing this final rule amending the test procedure for 
CRACs in satisfaction of its aforementioned obligations under EPCA.

B. Background

    On May 16, 2012, DOE published a final rule in the Federal 
Register, which, in relevant part, adopted test procedures for CRACs 
that incorporate by reference American National Standards Institute 
(``ANSI'')/ASHRAE Standard 127-2007, ``Method of Testing for Rating 
Computer and Data Processing Room Unitary Air Conditioners'' (``ANSI/
ASHRAE 127-2007''), which was the industry test procedure referenced in 
ASHRAE Standard 90.1-2010 for CRACs, as the basis for the Federal test 
procedure for such equipment. 77 FR 28928, 28989.
    On October 26, 2016, ASHRAE published ASHRAE Standard 90.1-2016, 
which included updates to the test procedure (``TP'') references for 
CRACs as compared to ASHRAE Standard 90.1-2010 and ASHRAE Standard 
90.1-2013.\3\ This action by ASHRAE triggered DOE's obligations under 
42 U.S.C. 6314(a)(4)(B), as outlined previously. Accordingly, DOE 
published a request for information (``RFI'') in the Federal Register 
on July 25, 2017 (``July 2017 ASHRAE TP RFI'') to collect information 
and data in consideration of amendments to DOE's test procedures for 
commercial package air conditioning and heating equipment, given the 
test procedure updates included in ASHRAE Standard 90.1-2016. 82 FR 
34427. Following the July 2017 ASHRAE TP RFI, AHRI published additional 
updates to its test procedure standard for CRACs on December 21, 2017 
(i.e., AHRI Standard 1360-2017, ``2017 Standard for Performance Rating 
of Computer and Data Processing Room Air Conditioners'' (``AHRI 1360-
2017'')). ASHRAE published ASHRAE Standard 90.1-2019 on October 24, 
2019, which updated the test procedure referenced for CRACs from AHRI 
1360-2016 to AHRI 1360-2017 and added equipment classes for ceiling-
mounted CRACs. Following the publication of ASHRAE Standard 90.1-2019, 
AHRI initiated work on an update to AHRI Standard 1360 (i.e., AHRI 
Standard 1360-202X Draft, ``Performance Rating of Computer and Data 
Processing Room

[[Page 21818]]

Air Conditioners (``Draft Standard'')'' (``AHRI 1360-202X Draft'').
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    \3\ More specifically, ASHRAE Standard 90.1-2016 references AHRI 
1360-2016, ``Standard for Performance Rating of Computer and Data 
Processing Room Air Conditioners'' for CRACs.
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    On February 7, 2022, DOE published in the Federal Register a notice 
of proposed rulemaking (``NOPR'') (``February 2022 NOPR'') proposing, 
in relevant part, to update the Federal test procedure for CRACs 
consistent with AHRI 1360-202X Draft. 87 FR 6948. A copy of the draft 
was added to the docket for this rulemaking for review by interested 
parties.\4\ As stated in the February 2022 NOPR, if AHRI were to 
publish a final version of AHRI 1360-202X Draft prior to DOE publishing 
a final rule, DOE's intention would be to reference the latest version 
of AHRI 1360 in the final rule. 87 FR 6948, 6951 (Feb. 7. 2022). DOE 
held a public meeting webinar on March 15, 2022, to discuss the 
proposed amendments to the CRACs test procedure presented in the 
February 2022 NOPR.
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    \4\ The AHRI 1360-202X Draft test procedure is available in the 
docket for this rulemaking at: www.regulations.gov/document/EERE-2021-BT-TP-0017-0001.
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    DOE received several comments in response to the February 2022 
NOPR. Table I.1 lists the commenters, along with each commenter's 
abbreviated name used throughout the final rule. Discussion of these 
comments, along with DOE's responses, are provided in the appropriate 
sections of this document.
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    \5\ AHRI's comment was received 23 days after the comment 
submission deadline.

          Table I.1--List of Commenters With Written Submissions in Response to the February 2022 NOPR
----------------------------------------------------------------------------------------------------------------
                                           Abbreviation used in this  Comment No. in
              Commenter(s)                        final rule            the docket          Commenter type
----------------------------------------------------------------------------------------------------------------
Air-Conditioning, Heating and             AHRI \5\..................               9  Industry Trade
 Refrigeration Institute.                                                              Organization.
Appliance Standards Awareness Project,    Joint Advocates...........               7  Efficiency Advocacy
 American Council for an Energy-                                                       Organizations.
 Efficient Economy, Natural Resources
 Defense Council and New York State
 Energy Research and Development
 Authority.
Northwest Energy Efficiency Alliance....  NEEA......................               5  Efficiency Advocacy
                                                                                       Organization.
Pacific Gas and Electric Company          CA IOUs...................               6  Utilities.
 (``PG&E''), San Diego Gas and Electric,
 and Southern California Edison;
 collectively, the California Investor-
 Owned Utilities.
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    A parenthetical reference at the end of a comment quotation or 
paraphrase provides the location of the item in the public record.\6\ 
To the extent that interested parties have provided written comments 
that are substantively similar to any oral comments provided during the 
March 15, 2022 NOPR public meeting, DOE cites the written comments 
throughout this final rule. Any oral comments provided during the 
webinar that are substantively distinct from a submitter's written 
comments are summarized and cited separately throughout this final 
rule.\7\
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    \6\ The parenthetical reference provides a reference for 
information located in the docket of DOE's rulemaking to develop 
test procedures for CRACs. (Docket No. EERE-2021-BT-TP-0017, which 
is maintained at www.regulations.gov.) The references are arranged 
as follows: (commenter name, comment docket ID number, page of that 
document).
    \7\ The March 15, 2022 TP NOPR Public Meeting Transcript can be 
found in the docket for this rulemaking at: www.regulations.gov 
under entry number EERE-2021-BT-TP-0017-0008. Comments arising from 
the public meeting are cited as follows: (commenter name, Public 
Meeting Transcript, No. 8 at p. X).
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    On March 7, 2022, DOE published in the Federal Register a NOPR 
proposing revised energy conservation standards (``March 2022 ECS 
NOPR'') for CRACs in terms of net sensible coefficient of performance 
(``NSenCOP''). 87 FR 12802. DOE conducted a crosswalk analysis to 
translate the current Federal standards in terms of sensible 
coefficient of performance (``SCOP'') to equivalent levels in terms of 
NSenCOP to evaluate potential amendments to the energy conservation 
standards, as appropriate. Id. at 87 FR 12817-12826. Any comments 
received in response to the February 2022 NOPR that pertain to energy 
conservation standards will be addressed in the energy conservation 
standards rulemaking and are not addressed in this document.
    In November, 2022, AHRI finalized AHRI 1360-202X Draft without 
substantial change and published AHRI Standard 1360-2022, ``Performance 
Rating of Computer and Data Processing Room Air Conditioners (``AHRI 
1360-2022'').
    In January 2023, ASHRAE published the 2022 edition of ASHRAE 
Standard 90.1, ``Energy Standard for Buildings Except Low-Rise 
Residential Buildings'' (``ASHRAE Standard 90.1-2022''). ASHRAE 
Standard 90.1-2022 maintains AHRI 1360-2017 as the referenced test 
procedure reference for CRACs.

II. Synopsis of the Final Rule

    In this final rule, DOE is updating its regulations for CRACs by: 
(1) incorporating by reference the updated version of AHRI Standard 
1360 (i.e., AHRI 1360-2022), as well as the relevant industry test 
standards referenced in AHRI 1360-2022; (2) establishing provisions for 
determining NSenCOP for CRACs; (3) clarifying the definition of a 
``computer room air conditioner'' to include consideration of how the 
equipment is marketed; and (4) amending certain provisions for 
representations and enforcement in 10 CFR part 429, consistent with the 
changes adopted in the test procedure. In terms of implementation, DOE 
is adding new appendices E and E1 to subpart F of 10 CFR part 431, 
``Uniform test method for measuring the energy consumption of computer 
room air conditioners,'' (``appendix E'' and ``appendix E1,'' 
respectively). The current DOE test procedure for CRACs is being 
relocated to appendix E without change, and the new test procedure 
incorporating by reference AHRI 1360-2022 is being established in 
appendix E1 for determining NSenCOP. Testing in accordance with 
appendix E1 is not required until such time as compliance is required 
with amended energy conservation standards for CRACs that rely on 
NSenCOP, should DOE adopt such standards. After such time, appendix E 
will no longer be used as part of the Federal test procedure.
    The adopted amendments are summarized in Table II.1 and compared to 
the relevant test procedure provisions in place prior to the amendment, 
as well as the reason for the adopted change.

[[Page 21819]]



   Table II.1--Summary of Changes in the Amended CRACs Test Procedure
                   Relative to Current Test Procedure
------------------------------------------------------------------------
 DOE test procedure prior to      Amended test
          amendment                 procedure            Attribution
------------------------------------------------------------------------
Located in 10 CFR 431.96....  Current test          Improve readability.
                               procedure unchanged
                               but relocated to
                               appendix E.
Incorporates by reference     Incorporates by       Updates to the
 ANSI/ASHRAE 127-2007.         reference in a new    applicable industry
                               appendix E1--AHRI     test procedures.
                               1360-2022, ANSI/
                               ASHRAE 127-2020,
                               and ANSI/ASHRAE 37-
                               2009.
Includes provisions for       Includes provisions   Updates to the
 determining SCOP.             for determining       applicable industry
                               NSenCOP in appendix   test procedures.
                               E1.
CRAC definition criteria      CRAC definition       To more clearly
 include: (1) used in          criteria include:     define CRACs and
 computer rooms (or similar    (1) marketed for      distinguish from
 applications); (2) whether    use in computer       other equipment
 rated for SCOP and tested     rooms (or similar     categories.
 in accordance with 10 CFR     applications); and
 431.96; and (3) not a         (2) not a consumer
 consumer product.             product.
Does not specify provisions   Defines roof, wall,   Updates to the
 specific to testing roof,     and ceiling-mounted   applicable industry
 wall, and ceiling-mounted     CRAC configurations   test procedures.
 CRAC units.                   and provides test
                               provisions specific
                               to such units.
Does not include CRAC-        Includes provisions   Establish CRAC-
 specific provisions for       in 10 CFR 429.43      specific provisions
 determination of              specific to CRACs     for determination
 represented values in 10      to determine          of represented
 CFR 429.43.                   represented values    values.
                               for models with
                               specific components
                               and prevent cooling
                               capacity over-
                               rating.
Does not include CRAC-        Adopts product-       Establish provisions
 specific enforcement          specific              for DOE enforcement
 provisions in 10 CFR          enforcement           testing of CRACs.
 429.134.                      provisions for
                               CRACs regarding
                               verification of
                               cooling capacity
                               and testing of
                               units with specific
                               components.
------------------------------------------------------------------------

    DOE has determined that the amendments described in section III of 
this final rule regarding the establishment of appendix E do not alter 
the measured efficiency of CRACs or require retesting solely as a 
result of DOE's adoption of the amendments to the test procedure. DOE 
has determined, however, that the test procedure amendments in appendix 
E1 do alter the measured efficiency of CRACs and that such amendments 
are consistent with the updated industry test procedure. Further, use 
of appendix E1 and the amendments to the representation requirements in 
10 CFR 429.43 are not required until the compliance date of any amended 
standards denominated in terms of NSenCOP, if adopted. However, 
manufacturers may use appendix E1 to certify compliance with any 
amended standards prior to the applicable compliance date for those 
standards. Additionally, DOE has determined that the finalized 
amendments will not increase the cost of testing. 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. Detailed 
discussion of DOE's actions is included in section III of this final 
rule.

III. Discussion

A. Scope of Applicability

    DOE currently defines ``computer room air conditioner'' as a basic 
model of commercial package air-conditioning and heating equipment 
(packaged or split) that is: used in computer rooms, data processing 
rooms, or other information technology cooling applications; rated for 
SCOP and tested in accordance with 10 CFR 431.96; and is not a covered 
consumer product under 42 U.S.C. 6291(1)-(2) and 42 U.S.C. 6292. A CRAC 
may be provided with, or have as available options, an integrated 
humidifier, temperature and/or humidity control of the supplied air, 
and reheating function. 10 CFR 431.92. DOE did not receive any comments 
from stakeholders regarding any revision of scope for this rulemaking.
    As discussed in section III.D.1 of this document, DOE is amending 
the definition of CRAC in this final rule. Specifically, DOE is 
revising the definition of ``computer room air conditioner'' to mean 
commercial package air conditioning and heating equipment (packaged or 
split) that is: marketed for use in computer rooms, data processing 
rooms, or other information technology cooling applications and not a 
covered consumer product under 42 U.S.C. 6291(1)-(2) and 6292. A 
computer room air conditioner may be provided with, or have as 
available options, an integrated humidifier, temperature and/or 
humidity control of the supplied air, and reheating function. Computer 
room air conditioners include, but are not limited to, the following 
configurations as defined in 10 CFR 431.92: down-flow, horizontal-flow, 
up-flow ducted, up-flow non-ducted, ceiling-mounted ducted, ceiling 
mounted non-ducted, roof-mounted, and wall-mounted. The scope of the 
CRAC test procedure, as amended by this final rule, is based on this 
revised definition.

B. Revised Organization of the CRAC Test Procedure

    In the February 2022 NOPR, DOE proposed to relocate and centralize 
the current test procedure for CRACs to a new appendix E to subpart F 
of 10 CFR part 431, without change. 87 FR 6948, 6952 (Feb. 7, 2022). As 
proposed, appendix E would continue to reference ANSI/ASHRAE 127-2007 
and provide instructions for determining SCOP. Id. As proposed, CRACs 
would be required to be tested according to appendix E until such time 
as compliance is required with amended energy conservation standards 
that rely on the NSenCOP metric, should DOE adopt such standards. Id.
    Accordingly, in parallel, DOE proposed to establish an amended test 
procedure for CRACs that adopted the substance of AHRI 1360-202X Draft 
in a new appendix E1 to subpart F of 10 CFR part 431. Id. DOE noted 
that it intended to incorporate by reference the final published 
version of AHRI 1360-202X Draft in the final rule, unless there were 
substantive changes between the draft and published versions, in which 
case DOE may adopt the substance of AHRI 1360-202X Draft or provide 
additional opportunity for comment on changes presented in the final 
version of the industry consensus test standard. Id. DOE noted that 
CRACs would not be

[[Page 21820]]

required to be tested according to the test procedure in appendix E1 
until such time as compliance is required with amended energy 
conservation standards that rely on the NSenCOP metric, should DOE 
adopt such standards. Id.
    DOE did not receive any comments in response to the February 2022 
NOPR's proposed reorganization of the test procedure. As discussed in 
the following sections of this final rule, DOE is adopting the 
finalized version of AHRI 1360 (i.e., AHRI 1360-2022), including the 
NSenCOP metric. AHRI 1360-2022 does not include any significant 
revisions as compared to AHRI 1360-202X Draft Accordingly, for the 
reasons discussed in the February 2022 NOPR and as discussed in the 
preceding paragraphs, DOE is finalizing the proposed reorganization of 
the test procedure by establishing appendices E and E1 for testing 
CRACs.

C. Updates to Industry Test Standards

    As noted previously, DOE's current test procedure for CRACs is 
codified at 10 CFR 431.96 and incorporates by reference ANSI/ASHRAE 
Standard 127-2007,\8\ which is the test procedure recognized by ASHRAE 
Standard 90.1-2010 for CRACs. However, the 2019 and 2022 versions of 
ASHRAE Standard 90.1 recognize AHRI 1360-2017 as the test procedure for 
CRACs.
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    \8\ While ANSI/ASHRAE Standard 127-2007 is incorporated by 
reference in its entirety, Table 1 to 10 CFR 431.96 (which defines 
the applicable test methods for each category of equipment) excludes 
section 5.11 of ANSI/ASHRAE Standard 127-2007 for testing CRACs. The 
test procedure also includes additional provisions related to break-
in period and test set-up. See 10 CFR 431.96(c) and (e).
---------------------------------------------------------------------------

    After publication of AHRI 1360-2017, DOE and other stakeholders 
supported the AHRI 1360 committee in its process to further update AHRI 
Standard 1360, which culminated in the publication of AHRI 1360-2022. 
AHRI 1360-2022 references ANSI/ASHRAE 127-2020, ``Method of Testing for 
Rating Computer and Data Processing Room Unitary Air Conditioners'' 
(``ANSI/ASHRAE 127-2020''),\9\ and ANSI/ASHRAE 37-2009, ``Methods of 
Testing for Rating Electrically Driven Unitary Air-Conditioning and 
Heat Pump Equipment'' (``ANSI/ASHRAE 37-2009''). Both AHRI 1360-2017 
and AHRI 1360-2022 include significant changes from ANSI/ASHRAE 127-
2007, including the use of NSenCOP instead of SCOP as the test metric. 
Both efficiency metrics (NSenCOP and SCOP) are ratios of net sensible 
cooling capacity delivered to the power consumed, but there are several 
differences in the conditions at which tests are performed. Section 
III.E.1 of this final rule includes further discussion of the 
differences between these test metrics.
---------------------------------------------------------------------------

    \9\ ASHRAE published ANSI/ASHRAE Standard 127-2020 on November 
30, 2020.
---------------------------------------------------------------------------

    In the February 2022 NOPR, DOE proposed to adopt AHRI 1360-202X 
Draft and provided a copy of that industry test standard in the 
regulatory docket.\10\ 87 FR 6948, 6952 (Feb. 7, 2022).
---------------------------------------------------------------------------

    \10\ See Document No. EERE-2021-BT-TP-0017-0001 at 
www.regulations.gov.
---------------------------------------------------------------------------

    In response to the February 2022 NOPR, AHRI commented that the AHRI 
1360-202X draft standard was not yet complete (at the time), and 
manufacturers, particularly those of newly included equipment, had not 
yet had an opportunity to evaluate the impact of this change, nor had 
the ASHRAE 90.1 committee. (AHRI, No. 9 at p. 2) AHRI further commented 
that DOE does not have the authority to adopt a test procedure edition 
not yet cited in ASHRAE Standard 90.1 as the national test procedure. 
Id. Consequently, AHRI recommended that DOE should adopt AHRI 1360-
2017, continue to work with AHRI and other relevant stakeholders to 
finalize the new edition of the test procedure, support the 
introduction of a proposed amendment to ASHRAE Standard 90.1, and then 
adopt the new procedure as the national test procedure during the next 
rulemaking for these products. (AHRI, No. 9 at p. 3)
    After the publication of the February 2022 NOPR, AHRI 1360-202X 
Draft was finalized and issued as AHRI 1360-2022 in November, 2022. 
AHRI 1360-2022 does not include any significant deviations from AHRI 
1360-202X Draft. As such, the adoption of AHRI 1360-2022 in this final 
rule is consistent with the proposal to reference AHRI 1360-202X Draft 
in the February 2022 NOPR.
    AHRI's concern regarding the draft status of AHRI 1360-202X Draft 
no longer applies, given the subsequent finalization of the draft and 
publication of AHRI 1360-2022. DOE notes that the Department was 
heavily involved with the AHRI 1360 committee, along with relevant 
industry stakeholders, to aid in the development of AHRI 1360-2022. DOE 
further notes that AHRI 1360-2022 represents an industry consensus 
update to AHRI 1360-2017. DOE disagrees with AHRI's argument that it 
lacks statutory authority for the adoption of AHRI 1360-2022, rather 
than AHRI 1360-2017, for the reasons that follow.
    With respect to small, large, and very large commercial package air 
conditioning and heating equipment (of which CRACs are a category), 
EPCA directs that when the generally accepted industry testing 
procedures or rating procedures developed or recognized by AHRI or by 
ASHRAE, as referenced in ASHRAE Standard 90.1, is amended, the 
Secretary shall amend the DOE test procedure consistent with the 
amended industry test procedure or rating procedure unless the 
Secretary determines, by clear and convincing evidence, that to do so 
would not meet the requirements for test procedures to produce results 
representative of an average use cycle and is not unduly burdensome to 
conduct. (42 U.S.C. 6314(a)(4)(B))
    As noted, DOE has a duty under the statute to adopt a test 
procedure that produces results representative of the covered 
equipment's average use cycle. Here, DOE has concluded, supported by 
clear and convincing evidence, that AHRI 1360-2022 would better meet 
that criterion of EPCA than AHRI 1360-2017. First, AHRI 1360-2022 
includes test provisions for measuring performance of roof-mounted and 
wall-mounted CRACs, configurations which are not considered in AHRI 
1360-2017. Were DOE to adopt AHRI 1360-2017 instead of AHRI 1360-2022, 
the DOE test procedure would not address representations for these 
configurations in terms of NSenCOP. Second, AHRI 1360-2022 provides 
clarifications and additional test requirements on several test 
procedure elements, including test tolerances, enclosure for CRACs with 
compressors in indoor units, secondary verification of capacity, ducted 
condensers, and refrigerant charging instructions. These elements were 
discussed in detail in the February 2022 NOPR. See 87 FR 6948, 6960-
6963 (Feb. 7, 2022). These additional test requirements improve the 
representativeness of the CRACs test procedure. For these reasons, DOE 
considers AHRI 1360-2022 to be more representative of CRAC operation 
than AHRI 1360-2017. With this finding made, DOE does not read EPCA as 
requiring the Department to dissect the industry standard and 
surgically transplant individual provisions of the new industry 
standard into the prior industry standard. DOE views the industry test 
standard as a functioning whole, so the approach AHRI suggests could 
insert errors and inconsistencies into the industry standard, as would 
prevent its proper functioning in practice as part of the DOE test 
procedure. Further, even if AHRI's approach were possible, it would be 
largely unnecessary; adoption of all the major provisions of the latest 
industry

[[Page 21821]]

test standard would arguably result in the remaining provisions being 
uncontroversial. Again, DOE would point out that the test procedure in 
question is the most current version of the industry's own approved 
test procedure, even if ASHRAE Standard 90.1 has not yet caught up with 
such change. DOE considered AHRI 1360-2017, as EPCA requires, but it 
ultimately determined that AHRI 1360-2022 would produce results that 
better reflect an average use cycle than would AHRI 1360-2017. DOE has 
concluded that EPCA does not allow the Department to turn a blind eye 
to such real world developments.
    Furthermore, DOE believes that Congress foresaw the practical 
benefits of a statutory reading consistent with DOE's interpretation. 
Although DOE recognizes that adopting AHRI 1360-2022 as the Federal 
test procedure for CRACs may create some disharmony between the Federal 
test procedure and the test procedure currently specified in ASHRAE 
Standard 90.1 for a period of time, such situation is arguably 
preferable to the alternative in which DOE and stakeholders would need 
to waste significant resources to reinitiate another rulemaking in 
short order after this proceeding to once again amend the Federal test 
procedure for CRACs to update the reference therein from AHRI 1360-2017 
to AHRI 1360-2022--the very same testing standard available for 
consideration at the present time.
    Finally, DOE notes that manufacturers are not required to use the 
test procedure to certify compliance with any energy conservation 
standards for CRACs until the compliance date established for such 
standards denominated in terms of the NSenCOP metric, if DOE proceeds 
to adopt such standards. The difference in ratings between measuring 
SCOP per the current Federal test procedure and measuring NSenCOP per 
the test procedure adopted in this final rule (which incorporates by 
reference AHRI 1360-2022) is addressed in the ongoing energy 
conservation standards rulemaking (see 87 FR 12802 (March 7, 2022)).
    Therefore, in light of these updates to the relevant industry 
consensus standards and for the reasons explained, DOE is amending its 
test procedure for CRACs by incorporating by reference AHRI 1360-2022 
for use in the new appendix E1. Specifically, in the new test procedure 
for CRACs at appendix E1, DOE is adopting sections 3.1, 3.2.2, 3.2.7, 
3.2.22, 3.2.25, 3.2.27, 3.2.28, 3.2.37, 3.2.38, 5, 6.1-6.3, 6.6, and 
6.8 and Appendices C, E, and F of AHRI 1360-2022 for the Federal test 
procedure for CRACs.\11\
---------------------------------------------------------------------------

    \11\ DOE notes that the substance of these provisions remains 
the same as those proposed in the February 2022 TP NOPR, but AHRI 
did some reorganization in moving from AHRI 1360-202X Draft to AHRI 
1360-2022. Consequently, the adopted section numbers cited here 
differ from those presented in DOE's proposed rule. See 87 FR 6948, 
6952 (Feb. 7, 2022).
---------------------------------------------------------------------------

    In the February 2022 NOPR, DOE proposed to incorporate by reference 
several industry standards that are internally referenced by AHRI 1360-
202X Draft. First, DOE proposed to incorporate by reference ANSI/ASHRAE 
127-2020. Specifically, in the proposed test procedure for CRACs at 10 
CFR part 431, subpart F, appendix E1, DOE proposed to reference Figure 
A-1, Test duct for measuring air flow and static pressure on downflow 
units, of Appendix A of ANSI/ASHRAE 127-2020, because Figure A-1 of 
Appendix A is referenced in section 5.8 of AHRI 1360-202X Draft. 
Second, DOE proposed to incorporate by reference ANSI/ASHRAE 37-2009 
because section 5, Appendix D, and Appendix E of AHRI 1360-202X Draft 
reference methods of test in ANSI/ASHRAE 37-2009. More specifically, 
DOE proposed to adopt all sections of ANSI/ASHRAE 37-2009, except 
sections 1, 2, and 4. 87 FR 6948, 6952 (Feb. 7, 2022).
    DOE did not receive any comments in response to its proposal to 
reference ANSI/ASHRAE 127-2020 and ANSI/ASHRAE 37-2009 in the test 
method for CRACs. These standards are also referenced in the finalized 
standard, AHRI 1360-2022, which DOE is incorporating by reference in 
this final rule. Therefore, for the reasons discussed in the preceding 
paragraphs and in the February 2022 NOPR, DOE incorporates by reference 
ANSI/ASHRAE 127-2020 and ANSI/ASHRAE 37-2009, and adopts the relevant 
sections for testing CRACs, as proposed in the February 2022 NOPR.

D. Definitions

1. CRAC Definition
    As discussed, DOE currently defines a CRAC as a basic model of 
commercial package air-conditioning and heating equipment (packaged or 
split) that is: used in computer rooms, data processing rooms, or other 
information technology cooling applications; rated for SCOP and tested 
in accordance with 10 CFR 431.96; and is not a covered consumer product 
under 42 U.S.C. 6291(1)-(2) and 42 U.S.C. 6292. 10 CFR 431.92. A 
computer room air conditioner may be provided with, or have as 
available options, an integrated humidifier, temperature and/or 
humidity control of the supplied air, and reheating function. Id. In 
defining a CRAC, DOE was unable to identify physical characteristics 
that consistently distinguish CRACs from other categories of commercial 
package air conditioning and heating equipment that provide comfort-
cooling. See 77 FR 16769, 16772-16774 (March 22, 2012); 77 FR 28928, 
28947-28948 (May 16, 2012).
    In the February 2022 NOPR, DOE proposed to amend the CRAC 
definition to include how the manufacturer markets a model for use, 
consistent with the definition in the draft industry standard, AHRI 
1360-202X Draft, which also defines CRACs based on marketing.\12\ 87 FR 
6948, 6952-6954 (Feb. 7, 2022). DOE also proposed to remove the current 
wording ``. . . rated for sensible coefficient of performance (SCOP) 
and tested in accordance with 10 CFR 431.96'' to ensure that a unit 
that otherwise meets the definition of a CRAC would be covered as a 
CRAC regardless of how the manufacturer has tested and rated the model. 
Id. DOE also proposed to remove the unnecessary current wording ``. . . 
a basic model of'' to avoid confusion as to whether the equipment 
constitutes a basic model--DOE specifies different basic model 
definitions for each equipment category at 10 CFR 431.92--before the 
determination is made whether the equipment meets the CRAC definition. 
Id. Specifically, DOE proposed to define ``computer room air 
conditioner'' as commercial package air conditioning and heating 
equipment (packaged or split) that is: marketed for use in computer 
rooms, data processing rooms, or other information technology cooling 
applications; and not a covered consumer product under 42 U.S.C. 
6291(1)-(2) and 6292. Id. The definition stated that a computer room 
air conditioner may be provided with, or have as available options, an 
integrated humidifier, temperature and/or humidity control of the 
supplied air, and reheating function. Id. Additionally, DOE proposed to 
specify in the definition that computer room air conditioners include, 
but are not limited to, the following configurations as defined in 10 
CFR 431.92: down-flow, horizontal-flow, up-flow ducted, up-flow non-
ducted, ceiling-mounted

[[Page 21822]]

ducted, ceiling mounted non-ducted, roof-mounted, and wall-mounted. Id.
---------------------------------------------------------------------------

    \12\ Section 3.5 of AHRI 1360-202X Draft defines ``computer room 
air conditioner'' as a subset of ``computer and data processing room 
air conditioner.'' Section 3.4 of AHRI 1360-202X Draft defines 
``computer and data processing room air conditioner,'' as an air 
conditioning unit specifically marketed for cooling data centers and 
information technology equipment.
---------------------------------------------------------------------------

    In the February 2022 NOPR, DOE requested comment on the proposed 
definition for ``computer room air conditioner'' that distinguishes 
between CRACs and other categories of air conditioning equipment, based 
on the marketing of the equipment. 87 FR 6948, 6954 (Feb. 7, 2022).
    AHRI recommended that DOE remove roof-mounted and wall-mounted 
units from the CRAC definition, as they are currently not included in 
the scope of AHRI 1360-2017 and of ASHRAE Standard 90.1-2019. (AHRI, 
No. 9 at pp. 4-5) Instead, AHRI expressed support for a definition 
consistent with DOE's proposal, but with roof-mounted and wall-mounted 
CRACs redacted from the definition. Id.
    The CA IOUs recommended adding the term ``exclusively'' to the 
proposed revised CRAC definition and to exclude comfort cooling 
products that are sometimes marketed for use in computer rooms (or 
similar applications) from the requirement to be tested to the CRAC 
test procedure. (CA IOUs, No. 6 at p. 1) The CA IOUs provided estimated 
performance data at CRAC rating conditions for commercial unitary air 
conditioners (``CUACs'') and 3-phase central air conditioners that they 
asserted as indicating that these equipment categories will always meet 
the CRAC efficiency standards in ASHRAE Standard 90.1-2019. (CA IOUs, 
No. 6 at pp. 1-5) The CA IOUs did not analyze the performance of 
single-packaged vertical air conditioners (``SPVU'') equipment under 
the CRAC test conditions but noted that DOE's energy efficiency metric 
for SPVUs is also energy efficiency ratio (``EER''), that SPVUs are 
tested at the same conditions as CUACs, and that the energy 
conservation standards for SPVUs are similar to the CUAC EER 
requirements in ASHRAE Standard 90.1-2019. Therefore, the CA IOUs 
recommended that DOE should also exclude SPVUs from the requirement of 
testing to the CRAC test procedure for equipment marketed for use in 
computer rooms (or similar applications). Id. Alternatively, the CA 
IOUs recommended that DOE allow NSenCOP to be calculated with an 
alternate efficiency determination method (``AEDM''). (CA IOUs, No. 6 
at p. 6)
    In response to AHRI, the addition of roof-mounted and wall-mounted 
CRACs to the scope of AHRI 1360-202X Draft, and as finalized in AHRI 
1360-2022, occurred after considerable deliberation in the AHRI 1360 
committee, in which DOE actively participated. As such, DOE considers 
this inclusion in a published AHRI standard to now represent industry 
consensus that models meeting the definition of roof-mounted and wall-
mounted CRACs should be tested to AHRI 1360-2022. Further, DOE has 
concluded that because such models meet the definition of CRAC and 
exist on the market, the Federal test procedure should include test 
provisions for such models. Therefore, DOE has determined the addition 
of these configurations to be appropriate for the CRAC Federal test 
procedure.
    In response to CA IOUs, DOE is not adopting the suggested 
exclusionary language (i.e., limiting coverage of CRAC regulations to 
models marketed exclusively for computer room cooling applications) 
because this would cause any CRAC equipment marketed for both data 
centers and comfort cooling to not meet the definition of a CRAC as set 
out in AHRI 1360-2022. To the extent that a basic model is covered 
under more than one equipment category (e.g., CRAC and CUAC), it would 
be subject to the regulations applicable to each equipment class that 
covers that basic model. Regarding AEDMs, DOE notes that current DOE 
regulations already allow manufacturers to use AEDMs to develop CRAC 
efficiency ratings, provided they perform physical testing on two test 
models per validation class. 10 CFR 429.70(c)(2).
    In summary, for the reasons discussed, DOE is updating the 
``computer room air conditioner'' definition in 10 CFR 431.92 as 
proposed in the February 2022 NOPR. Further, regarding the ``marketed 
for'' criterion in the revised CRAC definition, DOE will consider any 
publicly-available document published by the manufacturer (e.g., 
product literature, catalogs, and packaging labels) to determine the 
application for which the equipment is marketed.
2. CRAC Configuration Definitions
    CRACs can be installed in a variety of different configurations 
that vary by installation location, direction of airflow over the 
evaporator coil (e.g., up, down, or horizontal), and by return and 
discharge air connections (e.g., raised floor plenum, ducted, free 
air). To provide additional instruction as to which configuration (and, 
thus, which testing requirements and standards, as applicable) should 
be used for testing, the February 2022 NOPR proposed to add definitions 
for the following terms, consistent with the definitions in AHRI 1360-
202X Draft: floor-mounted, ceiling-mounted, wall-mounted, roof-mounted, 
up-flow, down-flow, horizontal-flow, up-flow ducted, up-flow non-
ducted, ceiling-mounted ducted, ceiling-mounted non-ducted, and fluid 
economizer. 87 FR 6948, 6954 (Feb. 7, 2022). DOE requested comment on 
the proposed definitions. Id.
    AHRI suggested that DOE should adopt definitions consistent with 
AHRI 1360-2017, stating that the current draft procedure was not yet 
ready for adoption. Instead, AHRI recommended that DOE should wait to 
adopt the definitions in AHRI 1360-202X Draft until they are adopted 
through the ASHRAE Standard 90.1 process. (AHRI, No. 9 at p. 5)
    DOE notes that AHRI's concern about the draft status of AHRI 1360-
202X Draft no longer applies, given the finalization and publication of 
AHRI 1360-2022. Furthermore, for the reasons discussed in section III.C 
of this document, the Department has concluded that EPCA does not 
preclude the agency from considering this updated industry test 
standard until it has been formally adopted through the ASHRAE Standard 
90.1 process. Accordingly, DOE has concluded that the inclusion of 
revised definitions for CRAC configurations in the published AHRI 
standard represent industry consensus that these revised definitions in 
AHRI 1360-2022 appropriately classify different configurations of 
CRACs. DOE notes that the definitions finalized in AHRI 1360-2022 are 
substantively the same as those included in DOE's proposal. DOE further 
notes that AHRI did not raise substantive issues with the specific 
proposed definitions for CRAC configurations. Therefore, DOE has 
concluded that the definitions proposed in the February 2022 NOPR, 
which are consistent with the updated industry consensus test procedure 
AHRI 1360-2022, appropriately classify different configurations of 
CRACs to clarify which test conditions apply to each configuration.
    As such, DOE is finalizing the definitions as proposed in the 
February 2022 NOPR. Specifically, DOE is defining ``floor-mounted,'' 
``ceiling-mounted,'' ``wall-mounted,'' ``roof-mounted,'' ``up-flow,'' 
``down-flow,'' ``horizontal-flow,'' ``up-flow ducted,'' ``up-flow non-
ducted,'' ``ceiling-mounted ducted,'' ``ceiling-mounted non-ducted,'' 
and ``fluid economizer'' as set out in 10 CFR 431.92 \13\ at the end of 
this document.
---------------------------------------------------------------------------

    \13\ As explained in the February 2022 NOPR, DOE is italicizing 
the defined terms within these definitions at 10 CFR 431.92 in order 
to signal to the reader which terms are separately defined. 87 FR 
6948, 6954 (Feb. 7, 2022).

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

[[Page 21823]]

E. Metric

1. NSenCOP
    DOE's current efficiency metric for CRACs is SCOP, which is a ratio 
of sensible cooling capacity delivered to the power consumed. For most 
categories of air conditioners and heat pumps other than CRACs, 
efficiency metrics are calculated based on total cooling capacity 
(which includes both sensible cooling and latent cooling). However, 
unlike the conditioned spaces in most commercial buildings, computer 
rooms and data centers typically have limited human occupancy and 
minimal dehumidification requirements, and, thus, primarily require 
only sensible cooling. Therefore, SCOP is calculated based on sensible 
cooling capacity rather than total cooling capacity.
    As discussed, ASHRAE Standard 90.1-2016 amended the efficiency 
metric for CRACs from SCOP (measured per ANSI/ASHRAE 127-2007) to 
NSenCOP (measured per AHRI 1360-2016). ASHRAE Standard 90.1-2019 
subsequently retained NSenCOP as the test metric, but it updated the 
test reference to AHRI 1360-2017 (which specifies NSenCOP as the test 
metric and has the same test conditions as AHRI 1360-2016). AHRI 1360-
202X Draft also specifies NSenCOP as the test metric and maintains the 
rating conditions found in AHRI 1360-2017, while also adding rating 
conditions for roof-mounted and wall-mounted units.
    Like SCOP, NSenCOP is a ratio of sensible cooling capacity to the 
power consumed. However, as discussed in the February 2022 NOPR, the 
test procedure to determine NSenCOP differs from that to determine SCOP 
in four key aspects: (1) For several CRAC configurations (e.g., down-
flow, up-flow ducted), different indoor entering air temperatures are 
specified; (2) for water-cooled CRACs, different entering water 
temperatures are specified; (3) for up-flow ducted configurations, 
different indoor air external static pressure (``ESP'') requirements 
are specified; and (4) for water-cooled and glycol-cooled CRACs, 
NSenCOP accounts for energy consumed by fans and pumps that would be 
installed in the outdoor heat rejection loop, which is not accounted 
for in SCOP. 87 FR 6948, 6956-6957 (Feb. 7, 2022).
    In response to the changes to the efficiency metric and referenced 
industry test standard for CRACs in ASHRAE Standard 90.1-2019 and AHRI 
1360-202X Draft, DOE proposed to update its efficiency metric for CRACs 
to NSenCOP and requested comment on its proposal. 87 FR 6948, 6957 
(Feb. 7, 2022). DOE also sought feedback on whether the rating 
conditions in AHRI 1360-202X Draft are appropriately representative of 
field applications. Id.
    On this topic, AHRI commented at the NOPR public meeting that it 
supported the adoption of NSenCOP as calculated in AHRI 1360-2017, as 
opposed to AHRI 1360-202X Draft. (AHRI, Public Meeting Transcript, No. 
8 at pp. 11-12) AHRI stated that a minor clarification would be 
required to be made in AHRI 1360-2017, which would align the capacity 
bins in AHRI 1360-2017 with those in ASHRAE 90.1-2019. Id. AHRI 
asserted that the revised approach for up-flow CRACs in a limited-
height set-up would have a measurable impact on the efficiency of those 
units, and that the stringency of the standard level established in 
ASHRAE Standard 90.1-2019 for this equipment would not correlate to the 
efficiency of the equipment as tested with the draft test procedure. 
Id. AHRI further asserted that the SCOP to NSenCOP crosswalk would, 
therefore, not be a direct crosswalk, at least for the up-flow units 
and for any other products for which ESP test requirements have 
changed. Id.
    In response, DOE notes the fact that the clarification mentioned by 
AHRI regarding the capacity demarcations is appropriately addressed in 
AHRI 1360-2022.
    Regarding the issue of testing up-flow units in a limited-height 
set-up, DOE surmises that the inclusion of a limited-height approach in 
the finalized AHRI 1360-2022 that aligns with the approach in AHRI 
1360-202X Draft indicates that this limited-height approach represents 
industry consensus on an appropriate test method. Further, DOE notes 
that the current Federal test procedure, which references ANSI/ASHRAE 
127-2007, does not have any provisions that allow for testing up-flow 
CRAC units in a limited-height set-up. As such, the crosswalk analysis 
conducted to translate standards from SCOP to NSenCOP (as presented in 
the March 2022 ECS NOPR; see 87 FR 12802, 12817-12822 (March 7, 2022)) 
compared SCOP as measured per ANSI/ASHRAE 127-2007 to NSenCOP as 
measured per AHRI 1360-202X Draft (which is the test procedure DOE 
proposed to adopt in the February 2022 NOPR). Therefore, the test 
approaches in any intermediate CRAC industry test procedures released 
between ANSI/ASHRAE 127-2007 and AHRI 1360-202X Draft (e.g., AHRI 1360-
2017 as mentioned by AHRI) are not relevant for DOE's crosswalk 
analysis, as such intermediate industry test procedures were never 
proposed or adopted as part of the Federal test procedure.
    The CA IOUs provided several recommendations to modify the proposed 
test procedure. (CA IOUs, No. 6 at p. 6) First, the CA IOUs recommended 
that DOE adopt the same entering air dry-bulb temperature for all CRAC 
configurations, asserting that containment, server rack orientation, 
and room temperature setpoints have much more significant impacts on 
return air temperature than CRAC configuration; therefore, basing test 
temperature on CRAC configuration may create arbitrary differences in 
efficiency representations among CRAC configurations, which would 
result in a market distortion in favor of some configurations over 
others. Id. Second, the CA IOUs recommended DOE use 86 [deg]F as the 
full-load condenser entering water temperature, as opposed to 83 [deg]F 
as prescribed in AHRI 1360-202X Draft, asserting that typically water-
cooled CRACs and other water-cooled heating, ventilation, and air 
conditioning (HVAC) equipment receive condenser water via a water-to-
water heat exchanger, and that the 86 [deg]F point takes into account 
the approach temperature of such a heat exchanger. Id. The CA IOUs 
added that test procedures for three other equipment categories have 
used 86 [deg]F as the full-load condenser entering water temperature: 
direct expansion-dedicated outdoor air system units (i.e., AHRI 
Standard 920-2020), variable refrigerant flow (``VRF'') water-source 
heat pumps (i.e., AHRI Standard 1230-2021), and water-source heat pumps 
less than 135,000 Btu/h (i.e., ISO 13256-1:1998) Third, the CA IOUs 
supported the inclusion of cooling tower/dry cooler fan and heat 
rejection pump energy in the CRAC efficiency rating, but suggested that 
DOE examine if the power demand adders of 5 percent and 7.5 percent for 
water-cooled and glycol-cooled CRACs, respectively, are representative. 
Id.
    The Joint Advocates supported the inclusion of a power adder for 
heat rejection components to improve the representativeness of the test 
for water-cooled and glycol-cooled CRACs. (Joint Advocates, No. 7 at p. 
1) The Joint Advocates encouraged DOE to investigate the 
representativeness of the proposed entering air dry-bulb 
temperatures,\14\ asserting that it did not appear that DOE has 
performed a thorough analysis of the representativeness of the proposed 
temperature values, but was rather simply proposing to adopt the values 
in AHRI 1360-202X Draft. (Joint Advocates, No. 7 at p. 1) The Joint

[[Page 21824]]

Advocates referenced the March 2022 ECS NOPR, noting that the impact of 
increasing the entering air dry-bulb temperature from 75 [deg]F to 95 
[deg]F for up-flow ducted and down-flow CRACs, led to an increase of 
net sensible cooling capacity and SCOP by approximately 22 percent and 
19 percent, respectively. (Joint Advocates, No. 7 at pp. 1-2) The Joint 
Advocates commented that given the large potential magnitude of change 
to the metrics, DOE should scrutinize the appropriateness of updating 
the entering air dry-bulb temperature values and, if a revision is 
found to be justified, the representativeness of the proposed entering 
air dry-bulb temperature values. Id.
---------------------------------------------------------------------------

    \14\ In their comment, the Joint Advocates refer to this as 
``return air temperature.''
---------------------------------------------------------------------------

    NEEA recommended that DOE ensure that the required ESP test 
conditions are representative of actual ESP conditions that units 
experience in the field. (NEEA, No. 5 at p. 4)
    As noted earlier, EPCA requires that the test procedures for 
commercial package air conditioning and heating equipment be those 
generally accepted industry testing procedures or rating procedures 
developed or recognized by 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 update 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)) As 
discussed in section III.C, DOE has concluded, supported by clear and 
convincing evidence, that AHRI 1360-2022 would better meet the 
criterion of EPCA than AHRI 1360-2017. DOE is not aware of any data or 
information indicating that the entering air dry-bulb temperature or 
ESP conditions in AHRI 1360-2022 are not representative of an average 
CRAC use cycle, and commenters did not provide any data or information 
to contradict this understanding. Therefore, DOE concludes that the 
rating conditions finalized in AHRI 1360-2022 are appropriate. The 
following paragraphs include DOE's responses to some of the comments 
received regarding specific rating conditions in AHRI 1360-202X Draft 
(and the subsequently finalized AHRI 1360-2022).
    Regarding entering air dry-bulb temperature, it is DOE's 
understanding that CRAC configurations in which the return air inlet is 
located close to the heat source (e.g., horizontal flow units, which 
are typically located adjacent to server racks) have higher entering 
air dry-bulb temperatures than configurations with return air inlets 
located further from the heat source. Numerous other versions of CRAC 
industry test procedures (i.e., ANSI/ASHRAE 127-2020, AHRI 1360-2017, 
and AHRI 1360-2016) also include different entering air dry-bulb 
temperatures for each configuration that are consistent with AHRI 1360-
202X Draft (and the subsequently finalized AHRI 1360-2022). Regarding 
the comment from Joint Advocates, while DOE agrees that differing 
entering air dry-bulb temperature values lead to a measurable change in 
the evaluated metrics for each configuration, DOE also notes that the 
standards proposed in the March 2022 ECS NOPR are separate for each 
configuration and reflect the different rating conditions. See 87 FR 
12802, 12809-12816 (March 7, 2022). Additionally, industry consensus as 
reflected in AHRI 1360-2022 suggests that using the same entering air 
dry-bulb temperature for all CRAC configurations would be less 
representative of an average use cycle for each unique CRAC 
configuration. Therefore, DOE has concluded that different entering air 
dry-bulb temperatures for each separate configuration are appropriate 
for inclusion in the revised test procedure.
    Similarly, ESP conditions may differ for CRAC configurations 
depending on how and where they may be installed. As noted earlier, DOE 
is not aware of any data or information indicating that the ESP 
conditions in AHRI 1360-2022 are not representative of an average CRAC 
use cycle, and NEEA did not provide any data or information to 
contradict this understanding.
    Regarding condenser entering water temperature, ANSI/ASHRAE 127-
2007 prescribes a test condition of 86 [deg]F (as suggested by the CA 
IOUs) for SCOP, but the lower 83 [deg]F condition was adopted in 
subsequent CRAC industry test procedures--ASHRAE 127-2020, AHRI 1360-
2016, and AHRI 1360-2017--in addition to AHRI 1360-202X Draft (and the 
subsequently finalized AHRI 1360-2022). DOE considers that this 
decrease in the condenser entering water temperature test condition 
from 86 [deg]F to 83 [deg]F was made after industry deliberation and 
represents industry consensus. DOE also notes that not all industry 
test procedures for other categories of commercial air conditioning and 
heating equipment are consistent in entering water temperature test 
conditions, as AHRI Standard 340/360-2022, ``Performance Rating of 
Commercial and Industrial Unitary Air-conditioning and Heat Pump 
Equipment,'' specifies an entering water temperature of 85 [deg]F for 
water-cooled CUACs. Therefore, DOE has concluded that the proposed 83 
[deg]F condition as the condenser entering water temperature for water-
cooled CRACs is appropriate and would produce the most representative 
results.
    Regarding the power consumption adders for heat rejection 
components for water-cooled and glycol-cooled CRACs, ANSI/ASHRAE 127-
2020, AHRI 1360-2016, and AHRI 1360-2017 also specify the same adders 
of 5 percent and 7.5 percent for water-cooled and glycol-cooled CRACs 
as proposed in the February 2022 NOPR. After a careful review, DOE was 
not able to find any information indicating that these values are not 
representative for CRAC installations. Therefore, DOE considers these 
demand adders to be appropriate for CRACs.
    In summary, DOE is updating its efficiency metric for CRACs to 
NSenCOP as measured per AHRI 1360-2022, at appendix E1. Appendix E 
continues to reference ANSI/ASHRAE 127-2007 and to provide instructions 
for determining SCOP. As noted earlier, CRACs are not required to be 
tested according to the test procedure in appendix E1 until such time 
as compliance is required with an amended energy conservation standard 
that relies on the NSenCOP metric, should DOE adopt such a standard.
2. Integrated Efficiency Metric
    In contrast to an efficiency metric that measures performance at 
only one test point, an annualized, or ``integrated'' efficiency metric 
measures performance at multiple test points (i.e., tests with 
different outdoor test conditions) that are intended to reflect 
seasonal variation in outdoor ambient temperatures that would be 
experienced by the equipment installed in the field.
    AHRI 1360-2016, AHRI-1360-2017, and AHRI 1360-202X Draft include an 
integrated efficiency metric--integrated net sensible coefficient of 
performance (``iNSenCOP''). The iNSenCOP metric comprises a weighted 
average of NSenCOP values for four test points at different outdoor 
conditions.\15\
---------------------------------------------------------------------------

    \15\ The rating conditions A, B, C, and D for iNSenCOP for air-
cooled units correspond to outdoor entering air temperatures of 95.0 
[deg]F, 80.0 [deg]F, 65.0 [deg]F, and 40.0 [deg]F, respectively.
---------------------------------------------------------------------------

    In the February 2022 NOPR, DOE noted that section D1 of AHRI 1360-
2017 (and section G1 of the subsequently updated AHRI 1360-202X Draft) 
states that ``a long-term goal is for iNSenCOP to replace NSenCOP after 
a more readily testable means has been

[[Page 21825]]

standardized.'' 87 FR 6948, 6957 (Feb. 7. 2022). DOE indicated that it 
was not aware of any test data that verify the validity of the iNSenCOP 
metric and that minimum efficiency levels in terms of iNSenCOP have not 
been adopted in ASHRAE Standard 90.1. Id. DOE acknowledged the 
potential benefit regarding representativeness that would be provided 
with an annualized metric for CRACs but concluded that given the 
apparent need for further validation and the lack of test data, DOE was 
unable to propose to use the iNSenCOP metric at this time. Id.
    The Joint Advocates and NEEA encouraged DOE to continue to 
investigate an annualized metric for CRACs. (Joint Advocates, No. 7 at 
p. 2; NEEA, No. 5 at pp. 1-2) The Joint Advocates commented that CRACs 
are designed to provide year-round cooling at a stable indoor cooling 
load and that an annualized metric that reflects an integrated measure 
of CRAC performance at different outdoor temperatures would be more 
representative of the efficiency of this equipment. (Joint Advocates, 
No. 7 at p. 2) NEEA commented that it supports DOE's proposal to use 
NSenCOP instead of SCOP, but encouraged DOE to conduct the research 
required to transition to the iNSenCOP metric, which NEEA asserted 
better accounts for the energy efficiency of CRACs given that it 
provides a standardized evaluation of the annualized cooling energy 
consumption of a unit operated across the specified range of outdoor 
ambient temperatures. (NEEA, No. 5 at pp. 1-2) NEEA commented that it 
believed integrating a part-load operation assessment was also feasible 
when this efficiency metric is adopted for CRACs in the future. Id.
    As noted in the February 2022 NOPR, DOE acknowledges the potential 
benefit regarding representativeness that would be provided with an 
annualized, integrated metric for CRACs. However, given the need for 
further validation and the lack of test data, DOE is not adopting the 
iNSenCOP metric at this time.
3. Part-Load Operation and Air Circulation Mode
    In the July 2017 ASHRAE TP RFI, DOE noted that CRACs typically 
operate at part-load (i.e., less than designed full cooling capacity) 
in the field. 82 FR 34427, 34432 (July 25, 2017). DOE discussed that 
the reasons for this may include, but are not limited to, redundancy in 
installed units to prevent server shutdown if a CRAC unit stops 
working, and server room designers building in extra cooling capacity 
to accommodate additional server racks in the future. Id. DOE also 
noted that while the current DOE test procedure measures performance at 
full-load, DOE has estimated that CRACs operate on average at a 
sensible load of 65 percent of the full-load sensible capacity.\16\ Id.
---------------------------------------------------------------------------

    \16\ See the analysis for a final rule for standards and test 
procedures for certain commercial heating, air conditioning, and 
water heating equipment (including CRACs) published in the Federal 
Register on May 16, 2012 (77 FR 28928). (Technical Support Document, 
EERE-2011-BT-STD-0029-0021, pp. 4-15, 4-16)
---------------------------------------------------------------------------

    Comments received in response to the July 2017 ASHRAE TP RFI and 
discussed in the February 2022 NOPR also suggested that CRACs are 
commonly oversized when installed in the field, and that this 
oversizing can significantly influence performance. 87 FR 6948, 6958 
(Feb. 7, 2022). Additionally, in the February 2022 NOPR, DOE noted it 
understands that many CRACs operate in air circulation mode and that 
incorporating air circulation mode in testing might incentivize use of 
more-efficient fan technologies for CRACs that typically operate at 
lower fan speeds in air circulation mode. Id. However, DOE did not have 
information or data on part-load or air circulation mode operation of 
CRACs to support a proposal to amend the efficiency metric to account 
for performance in these operating modes. Id.
    In response to the February 2022 NOPR, NEEA encouraged DOE to 
gather more data on the conditions and the percentage of time when 
CRACs typically operate in air circulation mode, noting that this 
information will help ensure that DOE's metric for CRACs is 
representative of average annual operation, which includes accounting 
for energy consumption in these modes. (NEEA, No. 5 at p. 2) Similarly, 
NEEA commented that it believes that incorporating part-load 
performance in the efficiency metric for CRACs would encourage the 
adoption of technologies that improve performance, such as variable-
speed fans and compressors. (NEEA, No. 5 at pp. 2-3) NEAA asserted that 
incorporating part-load and air-circulation modes into efficiency 
ratings would give consumers better information about the performance 
of different CRAC units. (NEEA, No. 5 at p. 3) NEEA agreed with DOE's 
statement that there is a lack of information and data on part-load or 
air-circulation-mode operation of CRACs, but the commenter recommended 
that DOE conduct more research to collect the necessary data to amend 
the proposed efficiency metric. Id.
    The Joint Advocates encouraged DOE to capture the part-load 
operation and air-circulation-mode operation of CRACs. (Joint 
Advocates, No. 7 at p. 2) The Joint Advocates asserted that the CRAC 
test procedure for determining NSenCOP is not representative of an 
average use cycle because many CRACs operate in part-load and air-
circulation mode, and fan energy is not accounted for in the NSenCOP 
metric. Id.
    The CA IOUs commented that CRACs operate at part load at nearly all 
times, so efficient part-load performance is more important than full-
load performance for optimal energy use. (CA IOUs, No. 6 at p. 7) The 
CA IOUs referenced studies conducted by PG&E, which they commented 
indicate that data centers are typically operated at part load to 
ensure maximum temperature and humidity control stability, reliability, 
and margin for future load increases. Id. The CA IOUs suggested that 
instead of adopting a part-load performance rating requirement at this 
time, DOE should consider requiring manufacturers to state the 
temperature at which capacity control becomes unstable and when the 
CRAC cannot operate within acceptable test capacity tolerance, and that 
this information would allow designers to evaluate the suitability of 
the part-load performance of different equipment options for specific 
applications. Id.
    These comments suggest that many CRACs operate in part load and in 
air-circulation mode and that incorporating these modes in testing 
could lead to a more representative test procedure. However, CRAC 
operation in these operating modes has not been addressed in any CRAC 
industry consensus test procedures. At this time, DOE does not have 
enough information or data on part-load or air-circulation mode 
operation of CRACs to support amending the efficiency metric to account 
for performance in these operating modes. Regarding CA IOUs' suggestion 
to require manufacturers to state the temperature at which capacity 
control becomes unstable, DOE has concluded that such provisions do not 
apply for testing to a full-load metric, which does not involve 
modulation of capacity below full-load. Because the Department is not 
adopting a part-load metric in this final rule, DOE is correspondingly 
not adopting the CA IOU's suggestion.
4. Controls Verification Procedure
    Neither the current Federal test procedure nor AHRI 1360-2022 
incorporates a controls verification procedure (``CVP'') for CRACs. The 
purpose of a CVP is to validate that the

[[Page 21826]]

observed positions of critical parameters for modulating components 
during the CVP are within tolerance of the certified critical parameter 
values in the supplementary test instructions (``STI'') that are set by 
the manufacturer in steady-state tests. This ensures that the measured 
results of the test procedure are based on critical parameter settings 
that are representative of critical parameter behavior that would be 
experienced in the field.
    In response to the February 2022 NOPR, NEEA commented that CRACs 
could benefit from a CVP and that a CVP would help ensure that 
manufacturer claims of energy savings from controls are accurate and 
can help verify that units are achieving the variable-speed benefits 
that are claimed. (NEEA, No. 5 at p. 3) NEEA noted that there is 
precedence for including a CVP in commercial HVAC products, such as VRF 
multi-split air conditioners and heat pumps. Id. NEEA further commented 
that a CVP may also check and test the energy savings from economizers, 
given that they are not a component of the proposed test procedure for 
basic CRAC models, and that incorporating a CVP is one potential way to 
capture those energy saving benefits for CRAC units that have an 
economizer. Id.
    As noted, AHRI 1360-2022, the industry standard that DOE is 
adopting in this final rule, does not include a CVP for CRACs. Further, 
DOE is not aware of any industry test procedures that include a CVP 
that would apply for CRACs. While DOE understands that there may be 
potential benefits of implementing a CVP for CRACs and acknowledges the 
precedent of a CVP for other commercial equipment such as VRF multi-
split systems, DOE understands that the market penetration of variable-
speed CRAC equipment is much smaller than for VRF multi-split systems. 
Given that DOE is not aware of an established CVP for CRAC nor any test 
data that could support adopting such a CVP, DOE is not adopting a CVP 
for CRACs in this final rule.

F. Configuration of Unit Under Test

1. Background and Summary
    CRACs are sold with a wide variety of components, including many 
that can optionally be installed on or within the unit both in the 
factory and in the field. In all cases, these components are 
distributed in commerce with the CRAC, but can be packaged or shipped 
in different ways from the point of manufacture for ease of 
transportation. Some optional components may affect a model's measured 
efficiency when tested to the DOE test procedure adopted in this final 
rule, and others may not. DOE is handling CRAC components in two 
distinct ways in this final rule to help manufacturers better 
understand their options for developing representations for their 
differing product offerings.
    First, the treatment of some components is specified by the test 
procedure to limit their impact on measured efficiency. For example, a 
fire/smoke/isolation damper must be set in the closed position and 
sealed during testing, resulting in a measured efficiency that would be 
similar or identical to the measured efficiency for a unit without a 
fire/smoke/isolation damper.
    Second, for certain components not directly addressed in the DOE 
test procedure, this final rule provides more specific instructions on 
how each component should be handled for the purposes of making 
representations in 10 CFR part 429. Specifically, these instructions 
provide clarity to manufacturers on how components should be treated 
and how to group individual models with and without optional components 
for the purposes of representations, in order to reduce burden. DOE is 
adopting these provisions in 10 CFR part 429 to allow for testing of 
certain individual models that can be used as a proxy to represent the 
performance of equipment with multiple combinations of components. DOE 
is adopting provisions expressly allowing certain models to be grouped 
together for the purposes of making representations and allowing the 
performance of a model without certain optional components to be used 
as a proxy for models with any combinations of the specified 
components, even if such components would impact the measured 
efficiency of a model. Steam/hydronic heat coils are an example of such 
a component. The efficiency representation for a model with a steam/
hydronic heat coil is based on the measured performance of the CRAC as 
tested without the component installed because the steam/hydronic heat 
coil is not easily removed from the CRAC for testing.\17\
---------------------------------------------------------------------------

    \17\ Note that in certain cases, as explained further in section 
III.F.2.c of this document, the representation may have to be based 
on an individual model with a steam/hydronic coil.
---------------------------------------------------------------------------

2. Approach for Exclusion of Certain Components
a. Proposals
    Appendix D of AHRI 1360-2022 (and Appendix D of AHRI 1360-202X 
Draft) provides discussion of components which would not be considered 
in representations, and provides instructions either to neutralize 
their impact during testing or for determining representations for 
individual models with such components based on other individual models 
that do not include them.
    Instead of referencing Appendix D of AHRI 1360-202X Draft, DOE 
tentatively determined in the February 2022 NOPR that it would be 
necessary to include related provisions in the proposed appendix E1 
test procedure and in the proposed representation requirements at 10 
CFR 429.43. 87 FR 6948, 6964 (Feb. 7. 2022). DOE noted that this 
revised approach would provide more detailed direction and clarity 
between test procedure provisions (i.e., how to test a specific unit) 
and certification and enforcement provisions (e.g., which model(s) to 
test). Id. Specifically, DOE proposed to include provisions for certain 
specific components to limit their impact on measured efficiency during 
testing. 87 FR 6948, 6981 (Feb. 7, 2022). Additionally, DOE proposed 
representation requirements in 10 CFR 429.43(a)(4) that explicitly 
allowed representations for individual models with certain components 
to be based on testing for individual models without those components. 
The proposal included a table listing the components for which these 
provisions would apply: air economizers, process heat recovery/reclaim 
coils/thermal storage, evaporative pre-cooling of air-cooled condenser 
intake air, steam/hydronic heat coils, refrigerant reheat coils, 
powered exhaust/powered return air fans, compressor variable frequency 
drive (``VFD''), fire/smoke/isolation dampers, non-standard indoor fan 
motors, humidifiers, flooded condenser head pressure controls, chilled 
water dual cooling coils, and condensate pump. 87 FR 6948, 6974-6975 
(Feb. 7. 2022). Finally, DOE proposed specific product enforcement 
provisions in 10 CFR 429.134 indicating that DOE would conduct 
enforcement testing on individual models that do not include the 
components listed in the aforementioned table, except in certain 
enumerated circumstances. 87 FR 6948, 6977 (Feb. 7. 2022).
b. General Comments
    AHRI generally supported DOE's proposals and agreed with the 
approach to include the optional features provisions in the test 
procedure directly and remove them from DOE's

[[Page 21827]]

Commercial HVAC Enforcement Policy.\18\ (AHRI, No. 9 at p. 6)
---------------------------------------------------------------------------

    \18\ On January 30, 2015, DOE issued a Commercial HVAC 
Enforcement Policy addressing the treatment of specific features 
during DOE testing of commercial HVAC equipment. (See 
www.energy.gov/gc/downloads/commercial-equipment-testing-enforcement-policies.)
---------------------------------------------------------------------------

    In this final rule, DOE is adopting its proposals in the February 
2022 NOPR regarding the exclusion of certain components, with some 
additional simplifications to further improve clarity. The different 
aspects of the provisions are described in the following sections.
c. Test Provisions Within Appendix E1
    DOE is adopting test provisions in section 4 of appendix E1 to 
prescribe how certain components must be configured for testing, as 
proposed in the February 2022 NOPR. Specifically, DOE is requiring in 
appendix E1 that steps be taken during unit set-up and testing to limit 
the impacts on the measurement of these components:

 Air economizers
 Process heat recovery/reclaim coils/thermal storage
 Evaporative pre-cooling of condenser intake air
 Steam/hydronic heat coils
 Refrigerant reheat coils
 Fire/smoke/isolation dampers
 Harmonic distortion mitigation devices
 Humidifiers
 Electric reheat elements
 Non-standard power transformer
 Chilled water dual cooling coils
 High-effectiveness indoor air filtration

    The components are listed and described along with their 
corresponding test provisions in Table 4.1 in section 4 of the new 
appendix E1.
    In response to the February 2022 NOPR, AHRI suggested the inclusion 
of provisions for four specific components (i.e., harmonic distortion 
mitigation devices, humidifiers, non-standard power transformers, and 
chilled water coils) to limit their impact on measured efficiency 
during testing. (AHRI, No. 9 at pp. 6-7) For harmonic distortion 
mitigation devices and non-standard power transformers, AHRI commented 
that these components cannot be removed for testing and that AHRI will 
consider including relevant provisions in the finalized version of AHRI 
1360-202X Draft. For humidifiers and chilled water coils, AHRI 
commented that these should be de-energized and removed from testing, 
respectively. Id.
    For humidifiers and chilled water coils, appendix E1 (as proposed 
in the February 2022 NOPR) includes provisions consistent with AHRI's 
suggestions. For harmonic distortion mitigation devices and non-
standard power transformers, AHRI 1360-2022 does not provide any 
further guidance on these components as AHRI's comment indicated. In 
the absence of any suggested alternative provisions, DOE has concluded 
that the provisions that were proposed for testing with these 
components in appendix E1 in the February 2022 NOPR are appropriate for 
the CRAC test procedure. Therefore, DOE is adopting the appendix E1 
provisions for these components as proposed.
d. Representation Provisions Within 10 CFR 429.43
    As discussed, in the February 2022 NOPR, DOE proposed 
representation requirements in 10 CFR 429.43(a)(4) that explicitly 
allowed representations for individual models with certain components 
to be based on testing for individual models without those components. 
The proposal included a table \19\ listing the components for which 
these provisions would apply (i.e., air economizers, process heat 
recovery/reclaim coils/thermal storage, evaporative pre-cooling of air-
cooled condenser intake air, steam/hydronic heat coils, refrigerant 
reheat coils, powered exhaust/powered return air fans, compressor VFD, 
fire/smoke/isolation dampers, non-standard indoor fan motors, 
humidifiers, flooded condenser head pressure controls, chilled water 
dual cooling coils, and condensate pump). 87 FR 6948, 6974-6975 (Feb. 
7, 2022).
---------------------------------------------------------------------------

    \19\ In the February 2022 NOPR, this table was referred to as 
``Table 1''; however, due to the publication of other test procedure 
actions subsequent to the February 2022 NOPR, this final rule refers 
to this table as ``Table 5 to paragraph (a)(3)(iv)(A)--Specific 
Components for Computer Room Air Conditioners'' of 10 CFR 429.43.
---------------------------------------------------------------------------

    In this final rule, DOE is making two clarifications to the 
representation requirements as proposed in the February 2022 NOPR.
    First, DOE is specifying that the basic model representation must 
be based on the least-efficient individual model that is a part of the 
basic model, and clarifying how this long-standing basic model 
provision interacts with the component treatment in 10 CFR 429.43 that 
this final rule adopts. Adoption of this clarification in the 
regulatory text is consistent with the February 2022 NOPR, in which DOE 
noted that in some cases, individual models may include more than one 
of the specified components or there may be individual models within a 
basic model that include various versions of the specified components 
that result in more or less energy use. 87 FR 6948, 6965 (Feb. 7, 
2022). In such cases, DOE stated that the represented values of 
performance must be representative of the individual model with the 
lowest efficiency found within the basic model. Id.
    DOE has determined that regulated entities may benefit from clarity 
in the regulatory text as to how the least-efficient individual model 
within a basic model provision is applied with the additional 
component-specific instructions for CRACs. The amendments in this final 
rule explicitly state that the exclusion of the specified components 
from consideration in determining basic model efficiency in certain 
scenarios is an exception to basing representations on the least-
efficient individual model within a basic model. In other words, the 
components listed in 10 CFR 429.43 are not being considered as part of 
the representation under DOE's regulatory framework if certain 
conditions are met as discussed in the following paragraphs, and, thus, 
their impact on efficiency is not reflected in the representation. In 
this case, the basic model's representation is generally determined by 
applying the testing and sampling provisions to the least-efficient 
individual model in the basic model that does not have a component 
listed in 10 CFR 429.43.
    Second, DOE is also clarifying instructions for determining the 
unit used for basic model representation to resolve instances where 
individual models within a basic model may have more than one of the 
specified components and there may be no individual model without any 
of the specified components. DOE is adopting the concept of an 
``otherwise comparable model group'' (``OCMG'') instead of using the 
``otherwise identical'' provisions proposed in the February 2022 NOPR. 
87 FR 6948, 6964-6965 (Feb. 7, 2022). DOE is using the term 
``comparable'' as opposed to ``identical'' to indicate that components 
that impact energy consumption as measured by the applicable test 
procedure are the relevant components to consider for the purpose of 
representations. Differences that do not impact energy consumption, 
such as unit color and presence of utility outlets, would, therefore, 
not warrant separate OCMGs. DOE developed and placed in the docket a 
document of examples to illustrate the approach in this final rule for 
determining represented values for CRACs with specific components, and 
in particular the OCMG concept. See EERE-2021-BT-TP-0017-0010.

[[Page 21828]]

    An OCMG is a group of individual models within the basic model that 
do not differ in components that affect energy consumption as measured 
according to the applicable test procedure other than the specific 
components listed in Table 5 of 10 CFR 429.43(a)(3)(iv)(A) (``Table 5 
of Sec.  429.43''). An OCMG may include individual models with any 
combination of such specified components, including no specified 
components, and an OCMG can be comprised of one individual model. 
Because every model within each OCMG is within the definition of the 
basic model, a basic model can be composed of multiple OCMGs. Each OCMG 
represents a unique combination of components that affect energy 
consumption, as measured according to the applicable test procedure, 
other than the specified components listed in Table 5 of Sec.  429.43; 
this means that a new combination of such components represents a new 
OCMG. For example, a manufacturer might include two tiers of control 
system within the same basic model, in which one of the control systems 
has sophisticated diagnostics capabilities that require a more powerful 
control board with a higher wattage input. CRAC individual models with 
the ``standard'' control system would be part of OCMG A, while 
individual models with the ``premium'' control system would be part of 
a different OCMG B, since the control system is a component that 
affects energy consumption and is not one of the specified exempt 
components listed in Table 5 of Sec.  429.43. However, OCMG A and OCMG 
B both may include individual models with different combinations of 
steam/hydronic coils, harmonic distortion mitigation devices, and 
humidifiers, for example. Both OCMGs may also include any combination 
of characteristics that do not affect the efficiency measurement, such 
as paint color.
    The OCMG is used to identify which individual models are used to 
determine a represented value for the basic model. Specifically, only 
the individual model(s) with the least number (which could be zero) of 
the specific components listed in Table 5 of Sec.  429.43 is considered 
when identifying the individual model. This clarifies which individual 
models are exempted from consideration for determination of represented 
values in the case of an OCMG with multiple specified components and no 
individual models with zero specific components listed in Table 5 of 
Sec.  429.43. Models with a number of specific components listed in 
Table 5 greater than the model(s) with the least number in the OCMG are 
exempted from consideration. In the case that the OCMG includes an 
individual model with no specific components listed in Table 5 of Sec.  
429.43, then all individual models in the OCMG with any specified 
components would be excluded from consideration. Among the remaining 
non-excluded models, the least efficient individual model across the 
OCMGs would be used to determine the representation of the basic model. 
In the case where there are multiple individual models within a single 
OCMG with the same non-zero least number of specified components, the 
least efficient of these would be considered.
    The use of the OCMG concept results in representations being based 
on the same individual models as the approach proposed in the February 
2022 NOPR, i.e., the represented values of performance are 
representative of the individual model(s) with the lowest efficiency 
found within the basic model, excluding certain individual models with 
the specific components listed in Table 5 of Sec.  429.43. However, the 
approach as adopted in this final rule is structured to more explicitly 
address individual models with more than one of the specific components 
listed in Table 5 of Sec.  429.43, as well as instances in which there 
is no comparable model without any of the specified components.
    Finally, DOE notes that use of the OCMG concept for CRACs is 
consistent with the approach finalized by DOE in test procedure final 
rules for direct expansion-dedicated outdoor air systems (see 87 FR 
45164 (July 27, 2022)) \20\ and single package vertical units (see 87 
FR 75144 (Dec. 7, 2022),\21\ and proposed in a test procedure NOPR for 
water-source heat pumps (see 87 FR 53302 (August 30, 2022)).\22\
---------------------------------------------------------------------------

    \20\ See also ``Direct Expansion Dedicated Outdoor Air Systems 
(DX-DOAS) Illustration of Specified Components Requirements 
Presentation'' (available at: www.regulations.gov/document/EERE-2017-BT-TP-0018-0038).
    \21\ See also ``Single Package Vertical Units (SPVU) 
Illustration of Specified Components Requirements, November 2022'' 
(available at: www.regulations.gov/document/EERE-2017-BT-TP-0020-0025).
    \22\ See also ``Water Source Heat Pumps (WSHP) Illustration of 
Specified Components Requirements, Test Procedure NOPR--August 
2022'' (available at: www.regulations.gov/document/EERE-2017-BT-TP-0029-0013).
---------------------------------------------------------------------------

    In response to the February 2022 NOPR, AHRI suggested that DOE 
should include in appendix E six additional components (coated coils, 
sound traps/sound attenuators, indoor or outdoor fans with VFD, 
compressor VFD, evaporative pre-cooling of condenser intake air, and 
hot gas bypass) at 10 CFR 429.134; AHRI commented that these components 
were included in the Commercial HVAC Enforcement Policy. (AHRI, No. 9 
at pp. 6-7)
    In response, DOE notes that none of these six components are 
specified for CRACs in the Commercial HVAC Enforcement Policy. However, 
AHRI 1360-202X Draft (and the subsequently finalized AHRI 1360-2022) 
includes three of the components--compressor VFD, evaporative pre-
cooling of condenser intake air, and coated coils--as optional features 
for CRACS. In the February 2022 NOPR, DOE tentatively concluded that it 
was appropriate to consider inclusion of compressor VFD and evaporative 
pre-cooling of condenser intake air as optional features, and the 
Department proposed provisions for these features at 10 CFR 429.43. 87 
FR 6948, 6975 (Feb. 7, 2022). Correspondingly, in this final rule DOE 
is including these two components as specific components listed in 
Table 5 of Sec.  429.43.
    Regarding sound traps/sound attenuator, indoor or outdoor fans with 
VFD, and hot gas bypass, DOE notes that these components are not 
included in AHRI 1360-202X Draft (and the subsequently finalized 
industry consensus test procedure AHRI 1360-2022). Further, DOE notes 
that AHRI did not provide any rationale as to the need for including 
these components as specific components in Table 5 of Sec.  429.43. 
Additionally, these components are not included for CRACs in the 
Commercial HVAC Enforcement Policy. Therefore, DOE has concluded that 
it has no basis to include these components as specific components 
listed in Table 5 of Sec.  429.43.
    Regarding coated coils, in the February 2022 NOPR, DOE proposed to 
exclude coated coils from the specific components list specified in 10 
CFR 429.43 because DOE tentatively concluded that the presence of 
coated coils does not result in a significant impact to performance of 
CRACs, and, therefore, that models with coated coils should be rated 
based on performance of models with coated coils. 87 FR 6948, 6965 
(Feb. 7, 2022). As discussed, DOE received comments from AHRI in 
response to the February 2022 NOPR that DOE should consider including 
coated coils in the list of specific components for CRACs at 10 CFR 
429.134. DOE also received similar comments pertaining to coated coils 
in response to other commercial HVAC equipment test procedure NOPRs, 
specifically the test procedure supplemental notice of proposed

[[Page 21829]]

rulemaking (``SNOPR'') published for direct expansion-dedicated outdoor 
air systems (``DX-DOASes'').\23\ (Docket No. EERE-2017-BT-TP-0018, 
AHRI, No. 34 at p. 4) In response to the DX-DOAS SNOPR, AHRI and 
Madison Indoor Air Quality (``MIAQ'') asserted that some coated coils 
impact performance, but that each coating is different. (Docket No. 
EERE-2017-BT-TP-0018, AHRI, No. 34 at p. 4; MIAQ, No. 29 at p. 4)
---------------------------------------------------------------------------

    \23\ See 86 FR 72874 (Dec. 23, 2021).
---------------------------------------------------------------------------

    AHRI's and MIAQ's assertions that some coated coils do impact 
energy use suggest that there are other implementations of coated coils 
that do not impact energy consumption as measured by the adopted test 
procedure (i.e., the implementation of coated coils does not 
necessarily or inherently impact energy use). DOE has no data 
indicating the range of impacts for those coatings that do affect 
energy use, or how other characteristics of the coatings, such as 
durability and cost, correlate with energy use impacts. Absent such 
data, DOE is unable to determine the specific range of impacts on 
energy use made by coated coils. Nevertheless, given that comments on 
the DX-DOAS SNOPR suggest that certain implementations of coated coils 
do not impact energy use, DOE has determined that for those units for 
which coated coils do impact energy use, representations should include 
those impacts, thereby providing full disclosure for commercial 
customers. Consequently, DOE is not incorporating coated coils into 
DOE's provisions specified in 10 CFR 429.43(a)(3) that allow for the 
exclusion of specified components when determining represented values 
for CRACs. This approach is consistent with the one DOE has established 
in a final rule for the DX-DOAS test procedure. 87 FR 45164, 45186 
(July 27, 2022).
e. Enforcement Provisions Within 10 CFR 429.134
    In the February 2022 NOPR, DOE sought to address CRACs that include 
components specified in 10 CFR 429.43(a)(4)(i) both in the requirements 
for representations (i.e., 10 CFR 429.43) and in the equipment-specific 
enforcement provisions for assessing compliance (i.e., 10 CFR 429.134). 
87 FR 6948, 6975-6977 (Feb. 7, 2022). DOE received no comments on this 
topic.
    Instructions on which units to test for the purpose of 
representations are addressed in 10 CFR 429.43. Consequently, DOE has 
determined that including parallel enforcement provisions in 10 CFR 
429.134 would be redundant and potentially cause confusion because DOE 
would select for enforcement only those individual models that are the 
basis for making basic model representations as specified in 10 CFR 
429.43. Therefore, in this final rule, DOE is providing the 
requirements for making representations of CRACs that include the 
specified components in 10 CFR 429.43 and is not including parallel 
direction in the enforcement provisions of 10 CFR 429.134 established 
in this final rule. However, DOE is finalizing the provision that 
allows enforcement testing of alternative individual models with 
specific components, if DOE cannot obtain for test the individual 
models without the components that are the basis of representation.
3. Non-Standard Indoor Fan Motors
    The Commercial HVAC Enforcement Policy includes high-static indoor 
blowers/oversized motors as an optional feature for CRACs, among other 
equipment. The Commercial HVAC Enforcement Policy states that when 
selecting a unit of a basic model for DOE[hyphen]initiated testing, if 
the basic model includes a variety of high-static indoor blowers or 
oversized motor options,\24\ DOE will test a unit that has a standard 
indoor fan assembly (as described in the STI that is part of the 
manufacturer's certification, including information about the standard 
motor and associated drive that was used in determining the certified 
rating). This policy only applies where: (a) the manufacturer 
distributes in commerce a model within the basic model with the 
standard indoor fan assembly (i.e., standard motor and drive), and (b) 
all models in the basic model have a motor with the same or better 
relative efficiency performance as the standard motor included in the 
test unit, as described in a separate guidance document discussed 
subsequently. If the manufacturer does not offer models with the 
standard motor identified in the STI or offers models with high-static 
motors that do not comply with the comparable efficiency guidance, DOE 
will test any indoor fan assembly offered for sale by the manufacturer.
---------------------------------------------------------------------------

    \24\ The Commercial HVAC Enforcement Policy defines ``high-
static indoor blower or oversized motor'' as an assembly that drives 
the fan and can deliver higher external static pressure than the 
standard indoor fan assembly sold with the equipment.
---------------------------------------------------------------------------

    DOE subsequently issued a draft guidance document (``Draft 
Commercial HVAC Guidance Document'') on June 29, 2015 to request 
comment on a method for comparing the efficiencies of a standard motor 
and a high-static indoor blower/oversized motor.\25\ As presented in 
the Draft Commercial HVAC Guidance Document, the relative efficiency of 
an indoor fan motor would be determined by comparing the percentage 
losses of the standard indoor fan motor to the percentage losses of the 
non-standard (oversized) indoor fan motor. The percentage losses would 
be determined by comparing each motor's wattage losses to the wattage 
losses of a corresponding reference motor. Additionally, the draft 
method contains a table that includes a number of situations with 
different combinations of characteristics of the standard motor and 
oversized motor (e.g., whether each motor is subject to Federal 
standards for motors, whether each motor can be tested to the Federal 
test procedure for motors, whether each motor horsepower is less than 
one) and specifies for each combination whether the non-standard fan 
enforcement policy would apply (i.e., whether DOE would not test a 
model with an oversized motor, as long as the relative efficiency of 
the oversized motor is at least as good as performance of the standard 
motor). DOE has not issued a final guidance document and is instead 
addressing the issue for CRACs in this test procedure rulemaking.
---------------------------------------------------------------------------

    \25\ Available at www1.eere.energy.gov/buildings/appliance_standards/pdfs/draft-commercial-hvac-motor-faq-2015-06-29.pdf.
---------------------------------------------------------------------------

    In the February 2022 NOPR, DOE noted that the approaches in section 
D3 of AHRI 1360-202X Draft for non-standard indoor fan motors and 
integrated fan and motor combinations (``IFMs'') generally align with 
the approaches of the Commercial HVAC Enforcement Policy and the Draft 
Commercial HVAC Guidance Document, while providing greater detail and 
accommodating a wider range of fan motor options. 87 FR 6948, 6966 
(Feb. 7, 2022). DOE also tentatively determined that section D3 of 
Appendix D of AHRI 1360-202X Draft would more fully provide the 
guidance intended by the Commercial HVAC Enforcement Policy with regard 
to non-standard indoor fan motors. Id. DOE proposed to adopt the 
provisions in section D3 of AHRI 1360-202X Draft for comparing the 
performance of standard and non-standard indoor fan motors and IFMs in 
the proposed appendix E1.\26\ Id.

[[Page 21830]]

Additionally, DOE proposed to adopt the provisions in section D3 of 
Appendix D of AHRI 1360-202X Draft for the determination of the 
represented efficiency value of CRACs at 10 CFR 429.43(a)(3)(v)(C) and 
for DOE assessment and enforcement testing of CRACs at 10 CFR 
429.134(s)(1). Id.
---------------------------------------------------------------------------

    \26\ Per DOE's existing certification regulations, if a 
manufacturer were to use the proposed approach to certify a basic 
model, the manufacturer would be required to maintain documentation 
of how the relative efficiencies of the standard and non-standard 
fan motors or the input power of the standard and non-standard IFMs 
were determined, as well as the supporting calculations. See 10 CFR 
429.71.
---------------------------------------------------------------------------

    In commenting on this issue, AHRI stated support for maintaining 
enforcement policy guidance even if such guidance moves to the test 
procedure provisions, and that for future adoption, AHRI would support 
provisions included in section D3 of Appendix D of 1360-202X Draft. 
(AHRI, No. 9 at p. 7)
    In the February 2022 NOPR, the Department proposed provisions 
(referencing section D3 of AHRI 1360-202X Draft) regarding non-standard 
indoor fan motors in the proposed 10 CFR 429.43(a)(3), which addresses 
representation requirements for CRACs, rather than in the DOE test 
procedure (i.e., appendix E1). Section D2 of AHRI 1360-2022 includes 
the same provisions as those present in AHRI 1360-202X Draft. DOE has 
concluded that maintaining provisions in both enforcement guidance and 
DOE regulations would be redundant, and that including provisions in 
DOE regulations provides better clarity to stakeholders. For the 
reasons discussed in the preceding paragraphs and the February 2022 
NOPR, DOE is finalizing its proposals regarding non-standard indoor fan 
motors as proposed in the February 2022 NOPR.

G. Represented Values

1. Multiple Refrigerants
    In the February 2022 NOPR, DOE noted that some commercial package 
air conditioning and heating equipment may be sold with more than one 
refrigerant option, and that DOE has identified at least one CRAC 
manufacturer that provides two refrigerant options under the same model 
number. 87 FR 6948, 6967 (Feb. 7, 2022). DOE stated that the use of a 
refrigerant (such as R-407C as compared to R-410A) that requires 
different hardware (i.e., compressors, heat exchangers, or air moving 
systems that are not the same or comparably performing) would represent 
a different basic model, and according to current DOE regulations, 
separate representations of energy efficiency are required for each 
basic model under 10 CFR 429.43(a). Id. DOE also noted that some 
refrigerants (such as R-422D and R-427A) would not require different 
hardware, and a manufacturer may consider them to be the same basic 
model. Id. In the February 2022 NOPR, DOE proposed and requested 
comment specifying that a manufacturer must determine the represented 
values for that basic model based on the refrigerant(s)--among all 
refrigerants listed on the unit's nameplate--that result in the lowest 
cooling efficiency. Id.
    AHRI supported the concept of DOE's proposal regarding 
representations for CRAC models approved for use with multiple 
refrigerants. (AHRI, No. 9 at p. 7) The CA IOUs also supported DOE's 
proposal to require only ratings for the worst-performance refrigerant 
for a given basic model and noted that this approach is consistent with 
DOE's policy for other HVAC equipment. (CA IOUs, No. 6 at p. 7) 
However, the CA IOUs recommended that DOE allow manufacturers to report 
test results of the same basic model with multiple refrigerants, 
stating that this would highlight equipment with the same hardware that 
can be operated with better-performing refrigerants. Id. The CA IOUs 
commented that commercial refrigeration equipment uses more than one 
refrigerant for rating, and that DOE allows representations using 
multiple refrigerants for consumer central air conditioners and heat 
pumps. Id.
    As discussed in section III.F.2 of this final rule, DOE is 
generally clarifying in 10 CFR 429.43(a)(3)(iv)(A) that representations 
for a CRAC basic model must be based on the least-efficient individual 
model(s) distributed in commerce within the basic model (with the 
exception specified in 10 CFR 429.43(a)(3)(iv)(A) for certain 
individual models with the components listed in Table 5 to 10 CFR 
429.43(a)(3); this list does not include different refrigerants). 
Therefore, upon further consideration, DOE has determined that the 
content of the proposal in the February 2022 NOPR regarding multiple 
refrigerants (which would have required representations based on the 
least-efficient refrigerant) is already included and clarified in the 
provision adopted at 10 CFR 429.43(a)(3)(iv)(A) (which require 
representations based on the least-efficient individual model (and thus 
also the least-efficient refrigerant), with the exception mentioned 
earlier in this paragraph), and that the refrigerant-specific 
provisions proposed in the February 2022 NOPR at 10 CFR 429.43(a)(3) 
would be redundant. As such, in this final rule, DOE is not adopting 
the refrigerant-specific language proposed in the February 2022 NOPR.
    Regarding the CA IOU's comment requesting provision allowing 
additional representations within a basic model for different 
refrigerants, DOE has concluded that because the efficiency of the CRAC 
could be impacted by different refrigerant choices, the least-efficient 
individual model requirement necessitates consideration of the least-
efficient refrigerant when determining represented values for that 
basic model. Therefore, DOE is not adopting the CA IOUs' suggestion to 
allow representations for multiple refrigerants within a single basic 
model, because it would be inconsistent with the Department's adopted 
requirement that the represented values for a basic model be based on 
the least-efficient individual model.
2. Net Sensible Cooling Capacity
    For CRACs, net sensible cooling capacity (``NSCC'') determines 
equipment class, which in turn determines the applicable energy 
conservation standard. 10 CFR 431.97. In the February 2022 NOPR, DOE 
noted that while NSCC is a required represented value for CRACs, DOE 
does not currently specify provisions for CRACs regarding how close the 
represented value of NSCC must be to the tested or alternative energy-
efficiency determination method (``AEDM'') simulated NSCC, or whether 
DOE will use measured or certified NSCC to determine equipment class 
for enforcement testing. 87 FR 6948, 6967 (Feb. 7, 2022). DOE proposed 
to add to its regulations the following provisions regarding NSCC for 
CRACs: (1) a requirement that the represented NSCC be between 95 
percent and 100 percent of the tested or AEDM-simulated cooling 
capacity; and (2) an enforcement provision stating that DOE would use 
the mean of measured NSCC values from testing, rather than the 
certified cooling capacity, to determine the applicable standards. Id.
    AHRI expressed support for DOE's proposal that the represented NSCC 
be between 95 percent and 100 percent of the tested or AEDM-simulated 
cooling capacity. (AHRI, No. 9 at p. 8) However, AHRI opposed DOE's 
proposed enforcement provision of using the mean of measured NSCC 
values from testing to determine the applicable standards, rather than 
the certified NSCC, stating that this is a deviation from the current 
requirement that DOE conduct statistical averaging of three units to 
confirm published capacity, and that this proposal was presented 
without supporting evidence necessary to make the change. Id. AHRI 
recommended that DOE apply enforcement provisions similar to those for 
packaged terminal air conditioners

[[Page 21831]]

(``PTACs''), which specify in paragraph (e) of 10 CFR 429.134 that if 
the certified cooling capacity is found to be ``valid'' based on the 5-
percent allowance to the tested mean, the reported certified value of 
cooling capacity is used in the next steps of decision making rather 
than just the mean itself. Id. AHRI noted that this 5-percent allowance 
is also currently provided for portable air conditioners, water 
heaters, and dehumidifiers. AHRI stated that using just the mean of the 
measurement(s) to determine the applicable standard with which the 
model must comply is too restrictive and does not follow precedence set 
by similar products. Id.
    In response, DOE acknowledges that the enforcement provisions for 
PTACs specified at 10 CFR 429.134(e) are different than those specified 
for CUACs at 10 CFR 429.134(g) (which are consistent with the 
provisions proposed for CRACs). However, the efficiency standards for 
PTACs are linearly variable with capacity (i.e., a change in PTAC 
capacity changes the minimum efficiency required). This relationship 
between capacity and the applicable standard justifies DOE's approach 
for PTACs to use the reported certified value of cooling capacity if 
the certified cooling capacity is found to be within tolerance. In 
contrast, the energy conservation standards for CRACs are based on 
equipment classes that are differentiated based on fixed-capacity 
thresholds (i.e., no linear relationship between capacity and the 
applicable standard). As noted, the proposed provisions for CRACs are 
consistent with the current enforcement provisions for CUACs at 10 CFR 
429.134(g), which have similar capacity thresholds for equipment 
classes and also have fixed efficiency standards within each class. To 
maintain consistency with the approach used for other similarly 
situated commercial air conditioning and heating equipment with 
equipment classes based on fixed-capacity thresholds, DOE is adopting 
the enforcement provisions specifying that DOE would use the mean of 
measured cooling capacity values from testing to determine the 
applicable standards.
3. Validation Class for Glycol-Cooled CRACs
    DOE's existing testing regulations allow the use of an AEDM, in 
lieu of actual testing, to simulate the efficiency of CRACs. 10 CFR 
429.43(a). In the AEDM requirements for CRACs in 10 CFR 429.70, the 
table itemizing validation classes for commercial HVAC equipment 
inadvertently omits glycol-cooled CRACs, which DOE understands to be 
similar in design to water-cooled CRACs. To address this, in the 
February 2022 NOPR, DOE proposed to include glycol-cooled CRACs in the 
existing validation class for water-cooled CRACs at 10 CFR 
429.70(c)(2)(iv). 87 FR 6948, 6968 (Feb. 7, 2022). Specifically, DOE 
proposed at 10 CFR 429.70(c)(2)(iv) that the minimum number of distinct 
water-cooled and/or glycol-cooled models that must be tested per AEDM 
would be two basic models, which aligns with the ``two basic model'' 
requirement that currently applies to the water-cooled CRACs validation 
class. Id.
    DOE did not receive any comments regarding this proposal, and for 
the reasons discussed in the preceding paragraph and the February 2022 
NOPR, DOE is adopting this change as proposed.

H. Effective and Compliance Dates

    As noted in the DATES section of this document, the effective date 
for the adopted test procedure amendments for CRACs is 30 days after 
publication of this final rule in the Federal Register. Regarding the 
compliance date, EPCA prescribes that, if DOE amends a test procedure, 
all representations of energy efficiency and energy use, including 
those made in the context of certification and 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)) However, CRACs are not 
required to be tested according to the test procedure in appendix E1 
(that relies on the NSenCOP metric) until the compliance date of 
amended energy conservation standards denominated in terms of the 
NSenCOP metric, should DOE adopt such standards.

I. Test Procedure Costs

    EPCA requires that the test procedures for commercial package air 
conditioning and heating equipment 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 procedure for CRACs, by adopting the 
industry test standard AHRI 1360-2022, including the energy efficiency 
metric, NSenCOP. DOE is also amending its representation and 
enforcement provisions for CRACs.
    In the February 2022 NOPR, DOE walked through the anticipated 
compliance costs associated with the proposed test procedure and 
tentatively determined that the test procedure proposals presented in 
the NOPR would not increase testing burden for most CRAC manufacturers 
(i.e., CRAC manufacturers who are AHRI members), compared to current 
industry practice as indicated by AHRI 1360-202X Draft, and that those 
proposed amendments would not have a significant impact on the 
remaining CRAC manufacturers (i.e., CRAC manufacturers who are not AHRI 
members). 87 FR 6948, 6968-6970 (Feb. 7, 2022).
    AHRI commented that manufacturers, particularly of up-flow CRACs, 
will experience significant impact if DOE adopts AHRI 1360-202X Draft, 
rather than AHRI 1360-2017, noting that AHRI 1360-202X Draft includes a 
revised right-angle static pressure deduction based on a study 
conducted on forward curve fans, which changes the static pressure 
deduction from a fixed 0.3 inches water gauge to one based on velocity. 
(AHRI, No. 9 at pp. 8-9)
    In response, DOE first notes that as previously mentioned, AHRI 
1360-202X Draft has been finalized as AHRI 1360-2022. The amended test 
procedure adopted in this final rule does not impose any additional 
test ducting provisions beyond those included in the amended industry 
consensus test procedure, AHRI 1360-2022. Additionally, DOE notes that 
the test provision for up-flow CRACs highlighted by AHRI is an 
alternate ducting methodology to be used when there is limited chamber 
height to meet the ducting requirements of ANSI/ASHRAE Standard 37, 
which are referenced in both ANSI/ASHRAE 127-2007 and AHRI 1360-2022. 
For most up-flow CRAC units (i.e., all CRACs except for tall units with 
large discharge duct dimensions), manufacturers can still choose to 
test their units in taller test chambers using the ducting requirements 
of ANSI/ASHRAE Standard 37, which comply with both the current CRAC 
test procedure and the amended test procedure adopted in this final 
rule. Further, DOE notes that the AEDM provision in 10 CFR 429.70 allow 
the use of AEDMs to develop ratings for CRACs, and, thus, manufacturers 
would not be required to test their very tall up-flow CRACs.

[[Page 21832]]

    DOE has determined that the amendments in this final rule will 
improve the representativeness, accuracy, and reproducibility of the 
test results and will not be unduly burdensome for manufacturers to 
conduct or result in increased testing cost as compared to the current 
test procedure. Because the current DOE test procedure for CRACs is 
being relocated to appendix E without change, the test procedure in 
appendix E for measuring SCOP will result in no change in testing 
practices. Should DOE adopt the proposed standards in the ongoing 
energy conservation standards rulemaking (see 87 FR 12802 (March 7, 
2022)) denominated in terms of the new metric (i.e., NSenCOP), the 
amended test procedure in appendix E1 for measuring NSenCOP (as per 
AHRI 1360-2022) would be required for use upon the compliance date of 
such standards.
    DOE has concluded that the test procedure at appendix E will not 
increase third-party lab testing costs per unit relative to the current 
DOE test procedure, which DOE estimates to be $10,200 (for CRACs that 
are physically tested \27\). However, DOE has concluded that the 
potential adoption of standards denominated in terms of NSenCOP (and 
the corresponding requirement to use the amended test procedure in 
appendix E1) would alter the measured energy efficiency for CRACs. 
Consequently, manufacturers would likely not be able to rely on data 
generated under the current test procedure and would, therefore, be 
required to re-rate CRAC models. In accordance with 10 CFR 429.70, CRAC 
manufacturers may elect to use AEDMs to rate models, which 
significantly reduces costs to industry. DOE estimates the per-
manufacturer cost to develop and validate an AEDM for CRACs to be 
$46,000. DOE estimates a cost of approximately $50 per basic model \28\ 
for determining energy efficiency using the validated AEDM.
---------------------------------------------------------------------------

    \27\ Manufacturers are not required to perform laboratory 
testing on all basic models. In accordance with 10 CFR 429.70, CRAC 
manufacturers may elect to use AEDMs. An AEDM is a computer modeling 
or mathematical tool that predicts the performance of non-tested 
basic models. These computer modeling and mathematical 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.
    \28\ DOE estimated initial costs to validate an AEDM assuming 80 
hours of general time to develop an AEDM based on existing 
simulation tools and 16 hours to validate two basic models within 
that AEDM at the cost of an engineering technician wage of $50 per 
hour plus the cost of third-party physical testing of two units per 
validation class (as required in 10 CFR 429.70(c)(2)(iv)). DOE 
estimated the additional per basic model cost to determine 
efficiency using an AEDM, assuming 1 hour per basic model at the 
cost of an engineering technician wage of $50 per hour.
---------------------------------------------------------------------------

    Given that most CRAC manufacturers are AHRI members, and that DOE 
is adopting the procedure in the prevailing industry test procedure 
that was established for use in AHRI's certification program, which has 
already been updated to include NSenCOP, DOE expects that most 
manufacturers will already be testing using the published version of 
the AHRI 1360-2022 in the timeframe of any potential future energy 
conservation standard. Based on this, DOE has determined that the test 
procedure amendments are not expected to increase the testing burden on 
CRAC manufacturers that are AHRI members. For the minority of CRAC 
manufacturers that are not members of AHRI, the test procedure 
amendments may have costs associated with model re-rating, to the 
extent that the manufacturers would not already be testing to the 
updated industry test procedure.

IV. Procedural Issues and Regulatory Review

A. Review Under Executive Orders 12866 and 13563

    Executive Order (``E.O.'') 12866, ``Regulatory Planning and 
Review,'' 58 FR 51735 (Oct. 4, 1993), 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 procedures and 
policies published on February 19, 2003.
    On February 7, 2022, DOE published in the Federal Register a notice 
of proposed rulemaking (``February 2022 NOPR'') proposing to update the 
references in the Federal test procedures to the most recent version of 
the relevant industry test procedures as they relate to computer room 
air conditioners (``CRACs'').
    As part of the February 2022 NOPR, DOE conducted its initial 
regulatory flexibility analysis (``IRFA''). 87 FR 6948, 6969-6970 (Feb. 
7, 2022). DOE

[[Page 21833]]

used the Small Business Administration (``SBA'') small business size 
standards to determine whether manufacturers qualify as small 
businesses, which are listed by the North American Industry 
Classification System (NAICS).\29\ The SBA considers a business entity 
to be a small business, if, together with its affiliates, it employs 
less than a threshold number of workers specified in 13 CFR part 121.
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    \29\ 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 on August 30, 2021).
---------------------------------------------------------------------------

    CRAC manufacturers are classified under NAICS code 333415, ``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. DOE utilized the 
California Energy Commission's Modernized Appliance Efficiency Database 
System (``MAEDbS'') \30\ and DOE's Compliance Certification Database 
(``CCD'') \31\ in identifying potential small businesses that 
manufacture CRACs covered by this rulemaking. DOE used subscription-
based business information tools (e.g., reports from Dun & Bradstreet 
\32\) to determine headcount and revenue of those small businesses. DOE 
identified nine companies that are original equipment manufacturers 
(``OEMs'') of CRACs covered by this rulemaking. DOE screened out 
companies that do not meet the definition of a ``small business'' or 
are foreign-owned and operated. DOE identified three small, domestic 
OEMs for consideration and noted that one small, domestic OEM was not 
an AHRI member, while the other two small, domestic OEMs were AHRI 
members. 87 FR 6948, 6969 (Feb. 7, 2022). DOE noted that small 
businesses would be expected to have different potential regulatory 
costs depending on whether they are a member of AHRI or not. Id. at 87 
FR 6970. DOE requested comment on the number of small businesses DOE 
identified and on the potential costs for the small business that is 
not an AHRI member and manufactures CRACs. Id.
---------------------------------------------------------------------------

    \30\ MAEDbS can be accessed at 
www.cacertappliances.energy.ca.gov/Pages/Search/AdvancedSearch.aspx 
(last accessed August 30, 2021).
    \31\ Certified equipment in the CCD are listed by product class 
and can be accessed at www.regulations.doe.gov/certification-data/#q=Product_Group_s%3A* (last accessed August 30, 2021).
    \32\ Market research available at: app.dnbhoovers.com (last 
accessed August 30, 2021).
---------------------------------------------------------------------------

    On that topic, AHRI commented that it represented the following 
single package vertical units (``SPVU'') companies that likely met the 
criteria of small businesses that could be disproportionally impacted 
by amended energy conservation standards: Bard Manufacturing Company, 
Marvair, Systemair, Temspec, and United CoolAir. (AHRI, No. 9 at p. 9)
    In response to AHRI's comment, DOE evaluated the four manufacturers 
mentioned by AHRI and their product offerings. While these 
manufacturers primarily manufacture SPVUs, which are not the subject of 
this rulemaking, DOE's review found that two of these manufacturers 
also offer products that meet the definition of wall-mounted CRAC 
adopted in this final rule. One of the two manufacturers qualifies as a 
small business under the applicable NAICS code (NAICS code 333415). 
However, DOE notes that there are currently no energy conservation 
standards for wall-mounted CRACs, and this is a test procedure 
rulemaking with no proposed amendments to energy conservation 
standards. Furthermore, DOE notes that no standards were proposed for 
wall-mounted CRACs in the March 2022 ECS NOPR. Consequently, these two 
manufacturers would not incur costs as a result of this final rule 
unless they choose to make voluntary representations regarding the 
NSenCOP of the subject equipment. Further, DOE is not adopting any test 
requirements for wall-mounted CRACs that are not included in the 
industry consensus test procedure AHRI 1360-2022. Additionally, AHRI's 
comment suggests that these manufacturers are AHRI members. Therefore, 
as discussed later in this section, it is DOE's conclusion that the 
test procedure amendments would not add any additional testing burden 
(beyond the updated industry consensus test procedure) to manufacturers 
that are members of AHRI.
    In this final rule, DOE is relocating the current DOE test 
procedure to a new appendix E of subpart F of part 431 (``appendix E'') 
without change. DOE is also establishing an amended test procedure at 
appendix E1 to subpart F of part 431 (``appendix E1''), which 
incorporates by reference the updated industry test standard AHRI 1360-
2022 for CRACs. Additionally, this final rule amends certain 
representation and enforcement provisions for CRACs in 10 CFR part 429.
    Appendix E does not contain any changes from the current Federal 
test procedure, and, therefore, will not impose no cost on industry and 
will not require retesting solely as a result of DOE's adoption of this 
amendment to the test procedure.
    The amended test procedure in appendix E1 includes amendments for 
measuring CRAC energy efficiency using the NSenCOP metric so as to be 
consistent with the updated industry test procedure. Should DOE adopt 
amended energy conservation standards in the future that are 
denominated in terms of NSenCOP (as proposed in the March 2022 ECS 
NOPR), DOE expects there would not be an increase in third-party lab 
testing costs per unit relative to the current Federal test procedure. 
DOE estimates such testing costs to be $10,200 per unit for physical 
testing. DOE has concluded that the amended test procedure may require 
re-rating of CRAC models; however, this would not be mandatory until 
such time as DOE amends the energy conservation standards for CRACs 
based on NSenCOP, should DOE adopt such amendments.
    If CRAC manufacturers conduct physical testing to certify a basic 
model, two units are required to be tested per basic model. However, 
manufacturers are not required to perform laboratory testing on all 
basic models, as CRAC manufacturers may elect to use AEDMs.\33\ An AEDM 
is a computer modeling or mathematical tool that predicts the 
performance of non-tested basic models. These computer modeling and 
mathematical 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.
---------------------------------------------------------------------------

    \33\ In accordance with 10 CFR 429.70.
---------------------------------------------------------------------------

    Small businesses would be expected to have different potential 
regulatory costs depending on whether they are a member of AHRI. DOE 
understands that all AHRI members and all manufacturers currently 
certifying to the AHRI Directory will be testing their CRAC models in 
accordance with AHRI 1360-2022, the industry test procedure DOE is 
incorporating by reference, and using AHRI's certification program, 
which has already been updated to include the NSenCOP metric.
    The test procedure amendments would not add any additional testing 
burden to manufacturers that are members of AHRI, as those members 
currently are or soon will be using the AHRI 1360-2022 test procedure. 
If DOE were to adopt energy conservation standards denominated in terms 
of the NSenCOP metric, the amended test procedure may, however, result 
in re-rating costs for manufacturers which are

[[Page 21834]]

not AHRI members (currently one identified OEM).
    DOE estimated the range of additional potential testing costs for 
the single small CRAC manufacturer that is not an AHRI member. This 
small business would only incur additional testing costs if they would 
not already be using AHRI 1360-2022 to test their CRAC models. DOE 
estimates that this small business manufactures 113 basic models.
    When developing cost estimates for this single, non-AHRI-member 
small business, DOE considered the cost to develop an AEDM, the costs 
to validate the AEDM through physical testing, and the cost per model 
to determine ratings using the AEDM. DOE anticipates that this small 
OEM would avail itself of the cost-saving option which the AEDM 
provides. DOE estimated the cost to develop and validate an AEDM for 
CRACs to be approximately $46,000, which includes physical testing of 
two models per validation class. Additionally, DOE estimated a cost of 
approximately $50 per basic model for determining energy efficiency 
using the validated AEDM. The estimated cost to rate the 113 basic 
models with the AEDM would be $5,650. Therefore, should DOE adopt 
amended energy conservation standards denominated in terms of NSenCOP 
as the efficiency metric (as proposed in the March 2022 ECS NOPR), this 
small business could incur total testing and rating costs of $51,650. 
DOE understands the annual revenue of this small business to be 
approximately $17 million. Therefore, testing and AEDM costs could 
cause this small business manufacturer to incur costs of up to 0.30 
percent of its annual revenue.
    Therefore, for the reasons stated in the preceding paragraphs, DOE 
concludes and certifies that the cost effects accruing from this test 
procedure final rule would not have a ``significant economic impact on 
a substantial number of small entities,'' and that the preparation of a 
FRFA is not warranted. DOE has submitted 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 CRACs 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 CRACs. (See 
generally 10 CFR part 429.) The 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 
CRACs in this final rule. Instead, DOE may consider proposals to amend 
the certification requirements and reporting for CRACs 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

    DOE has analyzed this regulation in accordance with the National 
Environmental Policy Act of 1969 (42 U.S.C. 4321 et seq.; ``NEPA'') and 
DOE's NEPA implementing regulations (10 CFR part 1021). In this final 
rule, DOE establishes test procedure amendments that it expects will be 
used to develop and implement future energy conservation standards for 
CRACs. DOE has determined that this rule falls into a class of actions 
that are categorically excluded from review under NEPA and DOE's 
implementing regulations, because it is a rulemaking that interprets or 
amends an existing rule or regulation that does not change the 
environmental effect of the rule or regulation being amended. 
Specifically, DOE has determined that adopting test procedures for 
measuring energy efficiency of consumer products and industrial 
equipment is consistent with activities identified in 10 CFR part 1021, 
subpart D, appendix A, sections 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 10, 
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 has 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

[[Page 21835]]

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. Public Law 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 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 to amend the test procedure for measuring 
the energy efficiency of CRACs 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 amendments to the Federal test procedure for CRACs contained in 
this final rule adopt testing methods contained in certain sections of 
the following commercial standards: AHRI 1360-2022, ANSI/ASHRAE 37-
2009, and ANSI/ASHRAE 127-2020. 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 rule before its effective date. The report will 
state that it has been determined that the final rule is not a

[[Page 21836]]

``major rule'' as defined by 5 U.S.C. 804(2).

N. Description of Materials Incorporated by Reference

    In this final rule, DOE incorporates by reference the following 
test standards:
    AHRI 1360-2022 is an industry-accepted test standard for measuring 
the performance of CRACs. AHRI 1360-2022 is available from AHRI 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 from ASHRAE and on 
ANSI's website at webstore.ansi.org/RecordDetail.aspx?sku=ANSI%2FASHRAE+Standard+37-2009.
    ANSI/ASHRAE 127-2007 is an industry-accepted test procedure for 
measuring the performance of CRACs. ANSI/ASHRAE 127-2007 is available 
from ASHRAE and on ANSI's website at https://webstore.ansi.org/standards/ashrae/ansiashrae1272007.
    ANSI/ASHRAE 127-2020 is an industry-accepted test procedure for 
measuring the performance of CRACs, which updates ANSI/ASHRAE 127-2007 
to include new CRAC cooling configurations. ANSI/ASHRAE 127-2020 is 
available from ASHRAE and on ANSI's website at webstore.ansi.org/standards/ashrae/ansiashrae1272020.
    The following standards were previously approved for incorporation 
by reference in the sections where they appear and no change is made: 
AHRI 210/240-2008, AHRI 340/360-2007, 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, Incorporation by reference, Reporting 
and recordkeeping requirements.

Signing Authority

    This document of the Department of Energy was signed on March 28, 
2023, 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 March 28, 2023.
Treena V. Garrett,
Federal Register Liaison Officer, U.S. Department of Energy.

    For the reasons stated in the preamble, DOE is amending 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. Removing the text ``http://'' wherever it appears;
0
b. Redesignating paragraph (c)(5) as paragraph (c)(6); and
0
c. Adding new paragraph (c)(5).
    The addition reads as follows:


Sec.  429.4  Materials incorporated by reference.

* * * * *
    (c) * * *
    (5) AHRI Standard 1360-2022 (I-P) (``AHRI 1360-2022''), 2022 
Standard for Performance Rating of Computer and Data Processing Room 
Air Conditioners, copyright 2022; IBR approved for Sec.  429.43.
* * * * *

0
3. Amend Sec.  429.43 by adding paragraph (a)(3)(iv) to read 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).

    (a) * * *
    (3) * * *
    (iv) Computer room air conditioners. When certifying to standards 
in terms of net sensible coefficient of performance (NSenCOP), the 
following provisions apply.
    (A) For individual model selection:
    (1) Representations for a basic model must be based on the least-
efficient individual model(s) distributed in commerce among all 
otherwise comparable model groups comprising the basic model, except as 
provided in paragraph (a)(3)(iv)(A)(2) of this section for individual 
models that include components listed in table 5 to paragraph 
(a)(3)(iv)(A) of this section. For the purpose of this paragraph 
(a)(3)(iv)(A)(1), otherwise comparable model group means a group of 
individual models distributed in commerce within the basic model that 
do not differ in components that affect energy consumption as measured 
according to the applicable test procedure specified at 10 CFR 431.96 
other than those listed in table 5 to paragraph (a)(3)(iv)(A) of this 
section. An otherwise comparable model group may include individual 
models distributed in commerce with any combination of the components 
listed in table 5 (or none of the components listed in table 5). An 
otherwise comparable model group may consist of only one individual 
model.
    (2) For a basic model that includes individual models distributed 
in commerce, with components listed in table 5 to paragraph 
(a)(3)(iv)(A) of this section, the requirements for determining 
representations apply only to the individual model(s) of a specific 
otherwise comparable model group distributed in commerce with the least 
number (which could be zero) of components listed in table 5 to 
paragraph (a)(3)(iv)(A) included in individual models of the group. 
Testing under this paragraph (a)(3)(iv)(A)(2) shall be consistent with 
any component-specific test provisions specified in section 4 of 
appendix E1 to subpart F of 10 CFR part 431.

[[Page 21837]]



  Table 5 to Paragraph (a)(3)(iv)(A)--Specific Components for Computer
                          Room Air Conditioners
------------------------------------------------------------------------
             Component                           Description
------------------------------------------------------------------------
Air Economizers...................  An automatic system that enables a
                                     cooling system to supply and use
                                     outdoor air to reduce or eliminate
                                     the need for mechanical cooling
                                     during mild or cold weather.
Process Heat Recovery/Reclaim       A heat exchanger located inside the
 Coils/Thermal Storage.              unit that conditions the
                                     equipment's supply air using energy
                                     transferred from an external source
                                     using a vapor, gas, or liquid.
Evaporative Pre-cooling of Air-     Water is evaporated into the air
 cooled Condenser Intake Air.        entering the air-cooled condenser
                                     to lower the dry-bulb temperature
                                     and thereby increase efficiency of
                                     the refrigeration cycle.
Steam/Hydronic Heat Coils.........  Coils used to provide supplemental
                                     heat.
Refrigerant Reheat Coils..........  A heat exchanger located downstream
                                     of the indoor coil that heats the
                                     supply air during cooling operation
                                     using high pressure refrigerant in
                                     order to increase the ratio of
                                     moisture removal to cooling
                                     capacity provided by the equipment.
Powered Exhaust/Powered Return Air  A powered exhaust fan is a fan that
 Fans.                               transfers directly to the outside a
                                     portion of the building air that is
                                     returning to the unit, rather than
                                     allowing it to recirculate to the
                                     indoor coil and back to the
                                     building. A powered return air fan
                                     is a fan that draws building air
                                     into the equipment.
Compressor Variable Frequency       A device connected electrically
 Drive (VFD).                        between the equipment's power
                                     supply connection and the
                                     compressor that can vary the
                                     frequency of power supplied to the
                                     compressor in order to allow
                                     variation of the compressor's
                                     rotational speed. If the
                                     manufacturer chooses to make
                                     representations for performance at
                                     part-load and/or low-ambient
                                     conditions, compressor VFDs must be
                                     treated consistently for all
                                     cooling capacity tests for the
                                     basic model (i.e., if the
                                     compressor VFD is installed and
                                     active for the part-load and/or low-
                                     ambient tests, it must also be
                                     installed and active for the
                                     NSenCOP test).
Fire/Smoke/Isolation Dampers......  A damper assembly including means to
                                     open and close the damper mounted
                                     at the supply or return duct
                                     opening of the equipment.
Non-Standard Indoor Fan Motors....  The standard indoor fan motor is the
                                     motor specified in the
                                     manufacturer's installation
                                     instructions for testing and shall
                                     be distributed in commerce as part
                                     of a particular model. A non-
                                     standard motor is an indoor fan
                                     motor that is not the standard
                                     indoor fan motor and that is
                                     distributed in commerce as part of
                                     an individual model within the same
                                     basic model.
                                    For a non-standard indoor fan
                                     motor(s) to be considered a
                                     specific component for a basic
                                     model (and thus subject to the
                                     provisions of paragraph
                                     (a)(3)(iv)(A) of this section), the
                                     following provisions must be met:
                                    1. Non-standard indoor fan motor(s)
                                     must meet the minimum allowable
                                     efficiency determined per section
                                     D.2.1 of AHRI 1360-2022
                                     (incorporated by reference, see
                                     Sec.   429.4) (i.e., for non-
                                     standard indoor fan motors) or per
                                     section D.2.2 of AHRI 1360-2022 for
                                     non-standard indoor integrated fan
                                     and motor combinations).
                                    If the standard indoor fan motor can
                                     vary fan speed through control
                                     system adjustment of motor speed,
                                     all non-standard indoor fan motors
                                     must also allow speed control
                                     (including with the use of VFD).
Humidifiers.......................  A device placed in the supply air
                                     stream for moisture evaporation and
                                     distribution. The device may
                                     require building steam or water,
                                     hot water, electricity, or gas to
                                     operate.
Flooded Condenser Head Pressure     An assembly, including a receiver
 Controls.                           and head pressure control valve,
                                     used to allow for unit operation at
                                     lower outdoor ambient temperatures
                                     than the standard operating control
                                     system.
Chilled Water Dual Cooling Coils..  A secondary chilled water coil added
                                     in the indoor air stream for use as
                                     the primary or secondary cooling
                                     circuit in conjunction with a
                                     separate chiller.
Condensate Pump...................  A device used to pump condensate and/
                                     or humidifier drain water from
                                     inside the unit to a customer drain
                                     outside the unit.
------------------------------------------------------------------------

    (B) The represented value of net sensible cooling capacity must be 
between 95 percent and 100 percent of the mean of the capacities 
measured for the units in the sample selected as described in paragraph 
(a)(1)(ii) of this section, or between 95 percent and 100 percent of 
the net sensible cooling capacity output simulated by the AEDM as 
described in paragraph (a)(2) of this section.
* * * * *

0
4. Amend Sec.  429.70 by revising the table in paragraph (c)(2)(iv) to 
read as follows:


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

* * * * *
    (c) * * *
    (2) * * *
    (iv) * * *

                     Table 1 to Paragraph (c)(2)(iv)
------------------------------------------------------------------------
                                              Minimum number of distinct
              Validation class                models that must be tested
                                                       per AEDM
------------------------------------------------------------------------
                 (A) Commercial HVAC Validation Classes
------------------------------------------------------------------------
Air-Cooled, Split and Packaged ACs and HPs   2 Basic Models.
 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 and     2 Basic Models.
 HPs, All Cooling Capacities.
Evaporatively-Cooled, Split and Packaged     2 Basic Models.
 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.

[[Page 21838]]

 
Air-Cooled, Variable Refrigerant Flow ACs    2 Basic Models.
 and HPs Greater than or Equal to 65,000
 Btu/h Cooling Capacity.
Water-Cooled, Variable Refrigerant Flow ACs  2 Basic Models.
 and HPs.
Computer Room Air Conditioners, Air Cooled.  2 Basic Models.
Computer Room Air Conditioners, Water-       2 Basic Models.
 Cooled and Glycol-Cooled.
Direct Expansion-Dedicated Outdoor Air       2 Basic Models.
 Systems, Air-cooled or Air-source Heat
 Pump, Without Ventilation Energy Recovery
 Systems.
Direct Expansion-Dedicated Outdoor Air       2 Basic Models.
 Systems, Air-cooled or Air-source Heat
 Pump, With Ventilation Energy Recovery
 Systems.
Direct Expansion-Dedicated Outdoor Air       2 Basic Models.
 Systems, Water-cooled, Water-source Heat
 Pump, or Ground Source Closed-loop Heat
 Pump, Without Ventilation Energy Recovery
 Systems.
Direct Expansion-Dedicated Outdoor Air       2 Basic Models.
 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 Water        2 Basic Models.
 Supply Boilers Less than 10 Gallons.
Gas-fired Water Heaters and Hot Water        2 Basic Models.
 Supply Boilers Greater than or Equal to 10
 Gallons.
Oil-fired Water Heaters and Hot Water        2 Basic Models.
 Supply Boilers Less than 10 Gallons.
Oil-fired Water Heaters and Hot Water        2 Basic Models.
 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 Packaged    2 Basic Models.
 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 Packaged    2 Basic Models.
 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 \1\
------------------------------------------------------------------------
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 Refrigerators.....  2 Basic Models.
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.

* * * * *

0
5. Amend Sec.  429.134 by adding paragraph (aa) to read as follows:


Sec.  429.134   Product-specific enforcement provisions.

* * * * *
    (aa) Computer room air conditioners. The following provisions apply 
for assessment and enforcement testing of models subject to energy 
conservation standards denominated in terms of NSenCOP.
    (1) Verification of net sensible cooling capacity. The net sensible 
cooling capacity of each tested unit of the basic model will be 
measured pursuant to the test requirements of 10 CFR part 431, subpart 
F, appendix E1. The mean of the net sensible cooling capacity 
measurement(s) will be used to determine the applicable energy 
conservation standards for purposes of compliance.
    (2) Specific components. If a basic model includes individual 
models with components listed at table 5 to Sec.  429.43(a)(3)(iv)(A) 
and DOE is not able to obtain an individual model with the least number 
(which could be zero) of those components within an otherwise 
comparable model group (as defined in Sec.  429.43(a)(3)(iv)(A)(1)), 
DOE may test any individual model within the otherwise comparable model 
group.

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

0
6. 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
7. Section 431.92 is amended by:
0
a. Revising the introductory text;

[[Page 21839]]

0
b. Adding, in alphabetical order, definitions for ``Ceiling-mounted,'' 
``Ceiling-mounted ducted,'' and ``Ceiling-mounted non-ducted'';
0
c. Removing the definition for ``Computer Room Air Conditioner'' and 
adding the definition ``Computer room air conditioner'' in its place; 
and
0
d. Adding, in alphabetical order, definitions for ``Down-flow,'' 
``Floor-mounted,'' ``Fluid economizer,'' ``Horizontal-flow,'' ``Net 
sensible coefficient of performance, or NSenCOP,'' ``Roof-mounted,'' 
``Up-flow,'' ``Up-flow ducted,'' ``Up-flow non-ducted,'' and ``Wall-
mounted.''
    The revisions and additions read as follows:


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

    The following definitions apply for purposes of this subpart, and 
of subparts J through M of this part. Any words or terms not defined in 
this section or elsewhere in this part shall be defined as provided in 
42 U.S.C. 6311. For definitions that reference the application for 
which the equipment is marketed, DOE will consider any publicly 
available document published by the manufacturer (e.g., product 
literature, catalogs, and packaging labels) to determine marketing 
intent. For definitions in this section that pertain to computer room 
air conditioners, italicized terms within a definition indicate terms 
that are separately defined in this section.
* * * * *
    Ceiling-mounted means a configuration of a computer room air 
conditioner for which the unit housing the evaporator coil is 
configured for indoor installation on or through a ceiling.
    Ceiling-mounted ducted means a configuration of a ceiling-mounted 
computer room air conditioner that is configured for use with discharge 
ducting (even if the unit is also configurable for use without 
discharge ducting).
    Ceiling-mounted non-ducted means a configuration of a ceiling-
mounted computer room air conditioner that is configured only for use 
without discharge ducting.
* * * * *
    Computer room air conditioner means commercial package air-
conditioning and heating equipment (packaged or split) that is marketed 
for use in computer rooms, data processing rooms, or other information 
technology cooling applications and not a covered consumer product 
under 42 U.S.C. 6291(1)-(2) and 42 U.S.C. 6292. A computer room air 
conditioner may be provided with, or have as available options, an 
integrated humidifier, temperature and/or humidity control of the 
supplied air, and reheating function. Computer room air conditioners 
include, but are not limited to, the following configurations as 
defined in this section: down-flow, horizontal-flow, up-flow ducted, 
up-flow non-ducted, ceiling-mounted ducted, ceiling mounted non-ducted, 
roof-mounted, and wall-mounted.
* * * * *
    Down-flow means a configuration of floor-mounted computer room air 
conditioner in which return air enters above the top of the evaporator 
coil and discharge air leaves below the bottom of the evaporator coil.
* * * * *
    Floor-mounted means a configuration of a computer room air 
conditioner for which the unit housing the evaporator coil is 
configured for indoor installation on a solid floor, raised floor, or 
floor-stand. Floor-mounted computer room air conditioners are one of 
the following three configurations: down-flow, horizontal-flow, and up-
flow.
    Fluid economizer means an option available with a computer room air 
conditioner in which a fluid (other than air), cooled externally from 
the unit, provides cooling of the indoor air to reduce or eliminate 
unit compressor operation when outdoor temperature is low. The fluid 
may include, but is not limited to, chilled water, water/glycol 
solution, or refrigerant. An external fluid cooler such as, but not 
limited to a dry cooler, cooling tower, or condenser is utilized for 
heat rejection. This component is sometimes referred to as a free 
cooling coil, econ-o-coil, or economizer.
* * * * *
    Horizontal-flow means a configuration of a floor-mounted computer 
room air conditioner that is neither a down-flow nor an up-flow unit.
* * * * *
    Net sensible coefficient of performance, or NSenCOP, means a ratio 
of the net sensible cooling capacity in kilowatts to the total power 
input in kilowatts for computer room air conditioners, as measured in 
appendix E1 of this subpart.
* * * * *
    Roof-mounted means a configuration of a computer room air 
conditioner that is not wall-mounted, and for which the unit housing 
the evaporator coil is configured for outdoor installation.
* * * * *
    Up-flow means a configuration of a floor-mounted computer room air 
conditioner in which return air enters below the bottom of the 
evaporator coil and discharge air leaves above the top of the 
evaporator coil.
    Up-flow ducted means a configuration of an up-flow computer room 
air conditioner that is configured for use with discharge ducting (even 
if the unit is also configurable for use without discharge ducting).
    Up-flow non-ducted means a configuration of an up-flow computer 
room air conditioner that is configured only for use without discharge 
ducting.
* * * * *
    Wall-mounted means a configuration of a computer room air 
conditioner for which the unit housing the evaporator coil is 
configured for installation on or through a wall.
* * * * *

0
8. Amend Sec.  431.95 by:
0
a. Adding paragraph (b)(10);
0
b. In paragraph (c)(2), removing the text ``D1, F1'' and adding, in its 
place, ``D1, E1, F1'';
0
c. In paragraph (c)(7), removing the text ``Sec.  431.96'' and adding, 
in its place, ``Sec.  431.96 and appendix E to this subpart'';
0
d. Redesignating paragraph (c)(8) as paragraph (c)(9); and
0
e. Adding new paragraph (c)(8).
    The additions and revisions read as follows:


Sec.  431.95   Materials incorporated by reference.

* * * * *
    (b) * * *
    (10) AHRI Standard 1360-2022 (I-P) (``AHRI 1360-2022''), 2022 
Standard for Performance Rating of Computer and Data Processing Room 
Air Conditioners, copyright 2022; IBR approved for appendix E1 to this 
subpart.
    (c) * * *
    (8) ANSI/ASHRAE Standard 127-2020 (``ANSI/ASHRAE 127-2020''), 
Method of Rating Air-Conditioning Units Serving Data Center (DC) and 
Other Information Technology Equipment (ITE) Spaces, ANSI-approved on 
November 30, 2020; IBR approved for appendix E1 to this subpart.
* * * * *

0
9. Amend Sec.  431.96 by revising table 1 to paragraph (b) to read as 
follows:


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

* * * * *
    (b) * * *

[[Page 21840]]



                                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....................  <760,000 Btu/h........  SCOP.................  Appendix E to this     None.
                                                                                                             subpart \3\.
                                                             <760,000 Btu/h........  NSenCOP..............  Appendix E1 to this    None.
                                                                                                             subpart \3\.
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.
                                                                                     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 this table, consult the notes at the beginning of those appendices to determine the applicable
  appendix to use for testing.

* * * * *

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

Appendix E to Subpart F of Part 431--Uniform Test Method for Measuring 
the Energy Consumption of Computer Room Air Conditioners

    Note: Manufacturers must use the results of testing under this 
appendix to determine compliance with the relevant energy 
conservation standards for computer room air conditioners from Sec.  
431.97 as that standard appeared in the January 1, 2022 edition of 
10 CFR parts 200 through 499. Specifically, representations, 
including compliance certifications, 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 through 499 edition revised as of 
January 1, 2022.
    For any amended standards for computer room air conditioners 
that rely on net sensible coefficient of performance (NSenCOP) 
published after January 1, 2022, manufacturers must use the results 
of testing under appendix E1 to this subpart to determine 
compliance. Manufacturers may use appendix E1 to certify compliance 
with any amended standards prior to the applicable compliance date 
for those standards.

[[Page 21841]]

    Specifically, representations, including compliance 
certifications, related to energy consumption must be based upon 
results generated under the appropriate appendix that applies (i.e., 
this appendix or appendix E1 to this subpart) when determining 
compliance with the relevant standard.

    1. Incorporation by Reference.
    DOE incorporated by reference in Sec.  431.95 the entire 
standard for ASHRAE 127-2007. However, certain enumerated provisions 
of ASHRAE 127-2007, as listed in section 1.1, are inapplicable. To 
the extent that there is a conflict between the terms or provisions 
of a referenced industry standard and the CFR, the CFR provisions 
control.
    1.1 ASHRAE 127-2007:
    (a) Section 5.11 is inapplicable as specified in section 2 of 
this appendix.
    (b) [Reserved]
    1.2 [Reserved]
    2. General. Determine the sensible coefficient of performance 
(SCOP) in accordance with ASHRAE 127-2007.
    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 4.1 and 4.2 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 must 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 must be used.

0
11. Add appendix E1 to subpart F of part 431 to read as follows:

Appendix E1 to Subpart F of Part 431--Uniform Test Method for Measuring 
the Energy Consumption of Computer Room Air Conditioners

    Note: Prior to the compliance date for any amended energy 
conservation standards based on NSenCOP for computer room air 
conditioners, representations with respect to energy use or 
efficiency of this equipment, including compliance certifications, 
must be based on testing pursuant to appendix E to this subpart. 
Subsequently, manufacturers must use the results of testing under 
this appendix to determine compliance with any amended energy 
conservation standards for computer room air conditioners provided 
in Sec.  431.97 that are published after January 1, 2022, and that 
rely on net sensible coefficient of performance (NSenCOP). 
Specifically, representations, including compliance certifications, 
related to energy consumption must be based upon results generated 
under the appropriate appendix that applies (i.e., appendix E to 
this subpart or this appendix) when determining compliance with the 
relevant standard. Manufacturers may use this appendix to certify 
compliance with any amended standards prior to the applicable 
compliance date for those standards.

    1. Incorporation by Reference
    DOE incorporated by reference in Sec.  431.95 the entire 
standards for AHRI 1360-2022, ANSI/ASHRAE 37-2009, and ANSI/ASHRAE 
127-2020. However, as listed in sections 1.1, 1.2, and 1.3 of this 
appendix, only certain enumerated provisions of AHRI 1360-2022 and 
ANSI/ASHRAE 127-2020 are applicable, and only certain enumerated 
provisions of ANSI/ASHRAE 37-2009 are not applicable. To the extent 
that there is a conflict between the terms or provisions of a 
referenced industry standard and the CFR, the CFR provisions 
control.
    1.1 AHRI 1360-2022:
    (a) The following sections of Section 3. Definitions--3.1 
(Expressions of Provision), 3.2.2 (Air Sampling Device(s)), 3.2.7 
(Computer and Data Processing Room Air Conditioner), 3.2.22 (Indoor 
Unit), 3.2.25 (Manufacturer's Installation Instruction), 3.2.27 (Net 
Sensible Cooling Capacity), 3.2.28 (Net Total Cooling Capacity), 
3.2.37 (Standard Air) and 3.2.38 (Standard Airflow) are applicable.
    (b) Section 5. Test Requirements, is applicable.
    (c) The following sections of Section 6. Rating Requirements--
6.1-6.3, 6.5 and 6.7 are applicable.
    (d) Appendix C. Standard Configurations--Normative, is 
applicable.
    (e) Section D2 of Appendix D. Non-Standard Indoor Fan Motors for 
CRAC units, is applicable.
    (f) Appendix E. Method of Testing Computer and Data Processing 
Room Air Conditioners--Normative, is applicable.
    (g) Appendix F. Indoor and Outdoor Air Condition Measurement--
Normative is applicable.
    1.2 ANSI/ASHRAE 127-2020:
    (a) Appendix A--Figure A-1, Test duct for measuring air flow and 
static pressure on downflow units, is applicable.
    (b) [Reserved].
    1.3 ASHRAE 37-2009:
    (a) Section 1 Purpose is inapplicable.
    (b) Section 2 Scope is inapplicable.
    (c) Section 4 Classification is inapplicable.
    2. General. Determine the net sensible coefficient of 
performance (NSenCOP), in accordance with AHRI 1360-2022, ANSI/
ASHRAE 127-2020, and ANSI/ASHRAE 37-2009. In cases where there is a 
conflict between these sources, the language of this appendix takes 
highest precedence, followed by AHRI 1360-2022, followed by ANSI/
ASHRAE 127-2020, followed by ANSI/ASHRAE 37-2009. Any subsequent 
amendment to a referenced document by a standard-setting 
organization will not affect the test procedure in this appendix, 
unless and until this test procedure is amended by DOE. Material is 
incorporated as it exists on the date of the approval, and 
notification of any change in the incorporation will be published in 
the Federal Register.
    3. Test Conditions
    3.1. Test Conditions for Certification. When testing to certify 
to the energy conservation standards in Sec.  431.97, test using the 
``Indoor Return Air Temperature Standard Rating Conditions'' and 
``Heat Rejection/Cooling Fluid Standard Rating Conditions'' 
conditions, as specified in Tables 3 and 4 of AHRI 1360-2022, 
respectively.
    4. Set-Up and Test Provisions for Specific Components. When 
testing a unit that includes any of the features listed in Table 4.1 
of this appendix, test in accordance with the set-up and test 
provisions specified in Table 4.1 of this appendix.

           Table 4.1--Test Provisions for Specific Components
------------------------------------------------------------------------
          Component                Description         Test provisions
------------------------------------------------------------------------
Air Economizers.............  An automatic system   For any air
                               that enables a        economizer that is
                               cooling system to     factory-installed,
                               supply outdoor air    place the
                               to reduce or          economizer in the
                               eliminate the need    100% return
                               for mechanical        position and close
                               cooling during mild   and seal the
                               or cold weather.      outside air dampers
                                                     for testing. For
                                                     any modular air
                                                     economizer shipped
                                                     with the unit but
                                                     not factory-
                                                     installed, do not
                                                     install the
                                                     economizer for
                                                     testing.
Process Heat Recovery/        A heat exchanger      Disconnect the heat
 Reclaim Coils/Thermal         located inside the    exchanger from its
 Storage.                      unit that             heat source for
                               conditions the        testing.
                               equipment's supply
                               air using energy
                               transferred from an
                               external source
                               using a vapor, gas,
                               or liquid.

[[Page 21842]]

 
Evaporative Pre-cooling of    Water is evaporated   Disconnect the unit
 Condenser Intake Air.         into the air          from the water
                               entering the air-     supply for testing
                               cooled condenser to   (i.e., operate
                               lower the dry-bulb    without active
                               temperature and       evaporative
                               thereby increase      cooling).
                               efficiency of the
                               refrigeration cycle.
Steam/Hydronic Heat Coils...  Coils used to         Test with steam/
                               provide               hydronic heat coils
                               supplemental heat.    in place but
                                                     providing no heat.
Refrigerant Reheat Coils....  A heat exchanger      De-activate
                               located downstream    refrigerant re-heat
                               of the indoor coil    coils so as to
                               that heats the        provide the minimum
                               supply air during     (none if possible)
                               cooling operation     reheat achievable
                               using high pressure   by the system
                               refrigerant in        controls.
                               order to increase
                               the ratio of
                               moisture removal to
                               cooling capacity
                               provided by the
                               equipment.
Fire/Smoke/Isolation Dampers  A damper assembly     For any fire/smoke/
                               including means to    isolation dampers
                               open and close the    that are factory-
                               damper mounted at     installed, close
                               the supply or         and seal the
                               return duct opening   dampers for
                               of the equipment.     testing. For any
                                                     modular fire/smoke/
                                                     isolation dampers
                                                     shipped with the
                                                     unit but not
                                                     factory-installed,
                                                     do not install the
                                                     dampers for
                                                     testing.
Harmonic Distortion           A high voltage        Remove harmonic
 Mitigation Devices.           device that reduces   distortion
                               harmonic distortion   mitigation devices
                               measured at the       for testing.
                               line connection of
                               the equipment that
                               is created by
                               electronic
                               equipment in the
                               unit.
Humidifiers.................  A device placed in    Test with
                               the supply air        humidifiers in
                               stream for moisture   place but providing
                               evaporation and       no humidification.
                               distribution. The
                               device may require
                               building steam or
                               water, hot water,
                               electricity, or gas
                               to operate.
Electric Reheat Elements....  Electric reheat       Test with electric
                               elements and          reheat elements in
                               controls that are     place but providing
                               located downstream    no heat.
                               of the cooling coil
                               that may heat the
                               air using
                               electrical power
                               during the
                               dehumidification
                               process.
Non-standard Power            A device applied to   Disable the non-
 Transformer.                  a high voltage load   standard power
                               that transforms       transformer during
                               input electrical      testing.
                               voltage to that
                               voltage necessary
                               to operate the load.
Chilled Water Dual Cooling    A secondary chilled   Test with chilled
 Coils.                        water coil added in   water dual cooling
                               the indoor air        coils in place but
                               stream for use as     providing no
                               the primary or        cooling.
                               secondary cooling
                               circuit in
                               conjunction with a
                               separate chiller.
High-Effectiveness Indoor     Indoor air filters    Test with the filter
 Air Filtration.               with greater air      offered by the
                               filtration            manufacturer with
                               effectiveness than    the least air
                               Minimum Efficiency    filtration
                               Reporting Value       effectiveness that
                               (MERV) 8 for ducted   meets or exceeds
                               units and MERV 1      MERV 8 for ducted
                               for non-ducted        units and MERV 1
                               units.                for non-ducted
                                                     units.
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[FR Doc. 2023-06760 Filed 4-10-23; 8:45 am]
BILLING CODE 6450-01-P