[Federal Register Volume 86, Number 218 (Tuesday, November 16, 2021)]
[Notices]
[Pages 63357-63370]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-24903]


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DEPARTMENT OF ENERGY

[Case No. 2021-009; EERE-2021-BT-WAV-0025]


Energy Conservation Program: Notification of Petition for Waiver 
of Nortek Global HVAC, LLC From the Department of Energy Central Air 
Conditioners and Heat Pumps Test Procedure, Notification of Denial of 
Interim Waiver, and Request for Comment

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

ACTION: Notification of petition for waiver and denial of an interim 
waiver; request for comments.

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SUMMARY: This notification announces receipt of and publishes a 
petition for waiver and interim waiver from Nortek Global HVAC, LLC 
(``Nortek''), which seeks a waiver for specified central air 
conditioner and heat pump basic models from the U.S. Department of 
Energy (``DOE'') test procedure used for determining the energy 
efficiency of these products. This notification also announces that DOE 
is declining to grant the request for an interim waiver from the test 
procedure for the reasons described in this notification. DOE solicits 
comments, data, and information concerning the petition and its 
suggested alternate test procedure so as to inform DOE's final decision 
on the waiver request.

DATES: Written comments and information are requested and will be 
accepted on or before December 16, 2021.

ADDRESSES: Interested persons are encouraged to submit comments using 
the Federal eRulemaking Portal at www.regulations.gov. Alternatively, 
interested persons may submit comments, identified by case number 2021-
009 and Docket number EERE-2021-BT-WAV-0025, by any of the following 
methods:
    1. Federal eRulemaking Portal: www.regulations.gov. Follow the 
instructions for submitting comments.
    2. Email: [email protected]">A[email protected]. Include the docket number 
EERE-2021-BT-WAV-0025 in the subject line of the message.
    No telefacsimiles (``faxes'') will be accepted. For detailed 
instructions on submitting comments and additional information on this 
process, see the SUPPLEMENTARY INFORMATION section of this document.
    Although DOE has routinely accepted public comment submissions 
through a variety of mechanisms, including postal mail and hand 
delivery/courier, the Department has found it necessary to make 
temporary modifications to the comment submission process in light of 
the ongoing coronavirus (``COVID-19'') pandemic. DOE is currently 
suspending receipt of public comments via postal mail and hand 
delivery/courier. If a commenter finds that this change poses an undue 
hardship, please contact Appliance Standards Program staff at (202) 
586-1445 to discuss the need for alternative arrangements. Once the 
COVID-19 pandemic health emergency is resolved, DOE anticipates 
resuming all of its regular options for public comment submission, 
including postal mail and hand delivery/courier.
    Docket: The docket, which includes Federal Register notices, 
comments, and other supporting documents/materials, is available for 
review at www.regulations.gov. All documents in the docket are listed 
in the www.regulations.gov index. However, some documents listed in the 
index, such as those containing information that is exempt from public 
disclosure, may not be publicly available.
    The docket web page can be found at www.regulations.gov/docket?D=EERE-2021-BT-WAV-0025. The docket web page contains 
instruction on how to access all documents, including public comments, 
in the docket. See the SUPPLEMENTARY INFORMATION section for 
information how to submit comments through www.regulations.gov.

FOR FURTHER INFORMATION CONTACT: 
    Ms. Julia Hegarty, U.S. Department of Energy, Office of Energy 
Efficiency and Renewable Energy, Building Technologies Office, Mailstop 
EE-5B, 1000 Independence Avenue SW, Washington, DC 20585-0121. Email: 
[email protected].
    Mr. Peter Cochran, U.S. Department of Energy, Office of the General 
Counsel, Mail Stop GC-33, Forrestal Building, 1000 Independence Avenue 
SW, Washington, DC 20585-0103. Telephone: (202) 586-9496. Email: 
[email protected].

SUPPLEMENTARY INFORMATION: DOE is publishing Nortek's petition for 
waiver, pursuant to 10 CFR 430.27(b)(1)(iv), inclusive of all 
substantive portions thereof and absent any information for which 
petitioner requested treatment as confidential business information.\1\ 
DOE invites all interested parties to submit in writing by December 16, 
2021, comments and information on all aspects of the petition, 
including an alternate test procedure. Pursuant to 10 CFR 430.27(d), 
any person submitting written comments to DOE must also send a copy of 
such comments to the petitioner. The contact information for the 
petitioner is:
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    \1\ The petition as submitted included the entire text of 10 CFR 
part 430 subpart B appendix M1. The reprint of the petition at the 
end of this notification includes only the substantive provisions of 
that appendix. The petition for waiver and petition for interim 
waiver is available in its entirety at www.regulations.gov/docket?D=EERE-2021-BT-WAV-0025.
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    Matthew Lattanzi, Nortek Global HVAC, 8000 Phoenix Parkway, 
O'Fallon, MO 63368. Email: [email protected].
    Submitting comments via www.regulations.gov. The 
www.regulations.gov web page will require you to provide your name and 
contact information. Your contact information will be viewable to DOE 
Building Technologies staff only. Your contact information will not be 
publicly viewable except for your first and last names, organization 
name (if any), and submitter representative name (if any). If your 
comment is not processed properly because of technical difficulties, 
DOE will use this information to contact you. If DOE cannot read your 
comment due to technical difficulties and cannot contact you for 
clarification, DOE may not be able to consider your comment.
    However, your contact information will be publicly viewable if you 
include it in the comment or in any documents attached to your comment. 
Any information that you do not want to be publicly viewable should not 
be included in your comment, nor in any document attached to your 
comment. If this instruction is followed, persons viewing comments will 
see only first and last names, organization names, correspondence 
containing comments, and any documents submitted with the comments.
    Do not submit to www.regulations.gov information for which 
disclosure is restricted by statute, such as trade secrets and 
commercial or financial information (hereinafter referred to as 
Confidential Business Information (``CBI'')). Comments submitted 
through www.regulations.gov cannot be claimed as CBI. Comments received 
through the website will waive any CBI claims for the information 
submitted. For

[[Page 63358]]

information on submitting CBI, see the Confidential Business 
Information section.
    DOE processes submissions made through www.regulations.gov before 
posting. Normally, comments will be posted within a few days of being 
submitted. However, if large volumes of comments are being processed 
simultaneously, your comment may not be viewable for up to several 
weeks. Please keep the comment tracking number that www.regulations.gov 
provides after you have successfully uploaded your comment.
    Submitting comments via email. Comments and documents submitted via 
email also will be posted to www.regulations.gov. If you do not want 
your personal contact information to be publicly viewable, do not 
include it in your comment or any accompanying documents. Instead, 
provide your contact information on a cover letter. Include your first 
and last names, email address, telephone number, and optional mailing 
address. The cover letter will not be publicly viewable if it does not 
include any comments.
    Include contact information each time you submit comments, data, 
documents, and other information to DOE. Faxes will not be accepted.
    Comments, data, and other information submitted to DOE 
electronically should be provided in PDF (preferred), Microsoft Word or 
Excel, WordPerfect, or text (ASCII) file format. Provide documents that 
are not secured, written in English and free of any defects or viruses. 
Documents should not contain special characters or any form of 
encryption and, if possible, they should carry the electronic signature 
of the author.
    Campaign form letters. Please submit campaign form letters by the 
originating organization in batches of between 50 to 500 form letters 
per PDF or as one form letter with a list of supporters' names compiled 
into one or more PDFs. This reduces comment processing and posting 
time.
    Confidential Business Information. According to 10 CFR 1004.11, any 
person submitting information that he or she believes to be 
confidential and exempt by law from public disclosure should submit via 
email two well-marked copies: One copy of the document marked 
confidential including all the information believed to be confidential, 
and one copy of the document marked ``non-confidential'' with the 
information believed to be confidential deleted. DOE will make its own 
determination about the confidential status of the information and 
treat it according to its determination.
    It is DOE's policy that all comments may be included in the public 
docket, without change and as received, including any personal 
information provided in the comments (except information deemed to be 
exempt from public disclosure).

I. Background and Authority

    The Energy Policy and Conservation Act, as amended (``EPCA''),\2\ 
authorizes DOE to regulate the energy efficiency of a number of 
consumer products and industrial equipment. (42 U.S.C. 6291-6317) Title 
III, Part B \3\ of EPCA, Public Law 94-163 (42 U.S.C. 6291-6309, as 
codified), established the Energy Conservation Program for Consumer 
Products Other Than Automobiles, which sets forth a variety of 
provisions designed to improve energy efficiency for certain types of 
consumer products. These products include central air conditioners and 
heat pumps (``CAC/HPs''), the subject of this notification. (42 U.S.C. 
6292(a)(3))
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    \2\ 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, 2021).
    \3\ For editorial reasons, upon codification in the U.S. Code, 
Part B was redesignated as Part A.
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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. 6291), test 
procedures (42 U.S.C. 6293), labeling provisions (42 U.S.C. 6294), 
energy conservation standards (42 U.S.C. 6295), and the authority to 
require information and reports from manufacturers (42 U.S.C. 6296).
    The Federal testing requirements consist of test procedures that 
manufacturers of covered products must use as the basis for: (1) 
Certifying to DOE that their products comply with the applicable energy 
conservation standards adopted pursuant to EPCA (42 U.S.C. 6295(s)), 
and (2) making representations about the efficiency of that product (42 
U.S.C. 6293(c)). Similarly, DOE must use these test procedures to 
determine whether the product complies with relevant standards 
promulgated under EPCA. (42 U.S.C. 6295(s))
    Under 42 U.S.C. 6293, EPCA sets forth the criteria and procedures 
DOE is required to follow when prescribing or amending test procedures 
for covered products. 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 covered product during a representative 
average use cycle or period of use and requires that test procedures 
not be unduly burdensome to conduct. (42 U.S.C. 6293(b)(3))
    Beginning January 1, 2023, any representations, including 
compliance certifications, made with respect to the energy use, power, 
or efficiency of CAC/HPs must be based on the results of testing 
according to the test procedure contained in the Code of Federal 
Regulations (``CFR'') at 10 CFR part 430, subpart B, appendix M1, 
Uniform Test Method for Measuring the Energy Consumption of Central Air 
Conditioners and Heat Pumps (``Appendix M1'').
    Under 10 CFR 430.27, any interested person may submit a petition 
for waiver from DOE's test procedure requirements. DOE will grant a 
waiver from the test procedure requirements if DOE determines either 
that the basic model for which the waiver was requested contains a 
design characteristic that prevents testing of the basic model 
according to the prescribed test procedures, or that the prescribed 
test procedures evaluate the basic model in a manner so 
unrepresentative of its true energy consumption characteristics as to 
provide materially inaccurate comparative data. 10 CFR 430.27(f)(2). A 
petitioner must include in its petition any alternate test procedures 
known to the petitioner to evaluate the performance of the product type 
in a manner representative of the energy consumption characteristics of 
the basic model. 10 CFR 430.27(b)(1)(iii). DOE may grant the waiver 
subject the conditions, including adherence to alternate test 
procedures. 10 CFR 430.27(f)(2).
    As soon as practicable after the granting of any waiver, DOE will 
publish in the Federal Register a notice of proposed rulemaking to 
amend its regulations so as to eliminate any need for the continuation 
of such waiver. 10 CFR 430.27(l). As soon thereafter as practicable, 
DOE will publish in the Federal Register a final rule to that effect. 
Id.
    The waiver process also provides that DOE may grant an interim 
waiver if it appears likely that the underlying petition for waiver 
will be granted and/or if DOE determines that it would be desirable for 
public policy reasons to grant immediate relief pending a determination 
on the underlying petition for waiver. 10 CFR 430.27(e)(2). Within one 
year of issuance of an interim waiver, DOE will either: (i) Publish in 
the Federal Register a

[[Page 63359]]

determination on the petition for waiver; or (ii) publish in the 
Federal Register a new or amended test procedure that addresses the 
issues presented in the waiver. 10 CFR 430.27(h)(2).
    If DOE ultimately denies the petition for waiver, or if the 
alternate test procedure specified in the interim waiver differs from 
the alternate test procedure specified by DOE in a subsequent Decision 
and Order, DOE will provide a period of 180 days before the 
manufacturer is required to use the DOE test procedure or the alternate 
test procedure specified in the Decision and Order to make 
representations of energy efficiency. 10 CFR 430.27(i). When DOE amends 
the test procedure to address the issues presented in a waiver, the 
waiver will automatically terminate on the date on which use of that 
test procedure is required to demonstrate compliance. 10 CFR 
430.27(h)(3).

II. Nortek's Petition for Waiver and Interim Waiver

    By letter dated September 7, 2021,\4\ Nortek filed a petition for 
waiver and interim waiver from the test procedure for CAC/HPs set forth 
in appendix M1, when effective.\5\ The petition specifies the basic 
models to be considered under the waiver request. (Nortek, No. 1 at pp. 
12-18). In its petition, Nortek asserted that appendix M1 contains 
errors in the calculations for capacity adjustment and power 
consumption for the indoor fan at part-load conditions, applicable to 
testing of two-stage coil-only CAC/HPs. (Nortek, No. 1 at p. 1). As 
such, Nortek claimed that the DOE test procedure evaluates its 
specified basic models in a manner unrepresentative of their true 
energy use; thereby providing materially inaccurate comparative data. 
Id.
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    \4\ A petition submitted under 10 CFR 430.27 is considered 
``received'' on the date it is received by DOE through DOE's 
established email box for receipt of waiver petitions or, if 
delivered by mail, on the date the waiver petition is stamped as 
received by the DOE. 10 CFR 430.27(e)(1)(iii).
    \5\ As noted, beginning January 1, 2023, any representations, 
including compliance certifications, made with respect to the energy 
use, power, or efficiency of CAC/HPs must be based on the results of 
testing according to the test procedure at appendix M1.
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    Coil-only systems are indoor units that are distributed in commerce 
without an indoor blower or separate designated air mover. Such systems 
installed in the field rely on a separately installed furnace or a 
modular blower for indoor air movement. Because coil-only CAC/HPs do 
not include their own indoor fan to circulate air, appendix M1 
prescribes equations that are used to calculate the assumed (i.e., 
``default'') power input and heat output of an average furnace fan with 
which the test procedure assumes the indoor coil is pared in a field 
installation. The resulting fan power input value is added to the 
electrical power consumption measured during testing. The resulting fan 
heat output value is subtracted from the measured cooling capacity of 
the CAC/HP for cooling mode tests and added to the measured heating 
capacity for heating mode tests. Separate fan power and fan heat 
equations are provided for different types of coil-only systems (i.e., 
mobile home or space-constrained vs. ``conventional'' non-mobile home 
and non-space-constrained). In each equation, the measured airflow rate 
(in cubic feet per minute of standard air (``scfm'')) is multiplied by 
a defined coefficient (expressed in Watts (``W'') per 1,000 scfm (``W/
1,000 scfm'') for fan power, and British Thermal Units (``Btu'') per 
hour (``Btu/h'') per 1,000 scfm (``Btu/h/1,000 scfm'') for fan heat), 
hereafter referred to as the ``default fan power coefficient'' and 
``default fan heat coefficient''.
    For coil-only units installed in mobile-home and space-constrained 
systems, appendix M1 defines a default fan power coefficient of 406 W/
1,000 scfm and a default fan heat coefficient of 1,385 Btu/h/1,000 
scfm. For coil-only units installed in conventional (i.e., non-mobile-
home and non-space-constrained) systems, appendix M1 defines a default 
fan power coefficient of 441 W/1,000 scfm and a default fan heat 
coefficient of 1,505 Btu/h/1,000 scfm.\6\ (10 CFR part 430, subpart B, 
appendix M1, section 3.3.d) For testing of two-stage coil-only systems, 
appendix M1 requires testing at two load conditions: (1) Full-load, 
operating at full compressor stage, and (2) low-load (also referred to 
as part-load), operating at the lower compressor stage. The test 
procedure defines the relative air volume rates to use for each test. 
The part-load test has a lower air volume rate than the full-load 
test.\7\ For both the default fan power coefficient and default fan 
heat coefficient, the same coefficient is used for both the full-load 
and part-load tests.
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    \6\ For example, for a CAC/HP test conducted at an airflow rate 
of 1,640 scfm, the default fan power for a ``conventional'' 
installation would be calculated as (441 W/1,000 scfm x 1,640 scfm = 
723 W); and the default fan heat would be calculated as (1,505 Btu/
h/1,000 scfm x 1,640 scfm = 2,466 Btu/h).
    \7\ Specifically, the indoor air volume rate to be used for 
testing at part-load (i.e., the ``cooling minimum air volume rate'') 
is the higher of (1) the rate specified by the installation 
instructions included with the unit by the manufacturer, or (2) 75 
percent of the cooling full-load air volume rate (see section 
3.1.4.2.c of appendix M1).
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    Nortek asserted that by applying the same default fan power 
coefficient and default fan heat coefficient to both the full-load and 
part-load tests, appendix M1 incorrectly establishes a linear 
relationship between indoor airflow and fan power (and fan heat); 
whereas, according to Nortek, a cubic relationship should be applied 
instead, citing the theoretical fan affinity laws that describe the 
relationship between fan power and airflow. (Nortek, No. 1 at p. 2) 
Nortek recommended an alternate test procedure that would define lower 
default fan power coefficients and default fan heat coefficients for 
the part-load tests, instead of applying the same coefficients to both 
the full-load and part-load tests, as is done in appendix M1. (Nortek, 
No. 1 at pp. 4-9) The lower coefficients recommended by Nortek are 
based on its analysis that incorporated theoretical fan power (based on 
fan affinity laws); estimates of fan motor efficiency (based on input 
from motor experts and Nortek's internal testing and experience); and 
estimates of the installed base of minimally efficient versus high-
efficiency motor technologies (based on estimates from the 2015 energy 
conservation standards rulemaking). Id.
    Nortek also requests an interim waiver from the existing DOE test 
procedure. DOE must review the petition for interim waiver within 45 
business days of receipt of the petition. 10 CFR 430.27(e)(1)(ii). If 
DOE does not notify the applicant of the disposition of the petition 
for interim waiver, in writing, within 45 business days of receipt of 
the petition, the interim waiver is granted utilizing the alternate 
test procedure requested in the petition. Id. DOE will grant an interim 
waiver if it appears likely that the petition for waiver will be 
granted, and/or if DOE determines that it would be desirable for public 
policy reasons to grant immediate relief pending a determination of the 
petition for waiver. 10 CFR 430.27(e)(2).

III. Requested Alternate Test Procedure

    EPCA requires that manufacturers use DOE test procedures when 
making representations about the energy consumption and energy 
consumption costs of covered products. (42 U.S.C. 6293(c)) Consistency 
is important when making representations about the energy efficiency of 
covered products, including when demonstrating compliance with 
applicable DOE energy conservation standards. Pursuant to 10 CFR 
430.27, and after consideration of public comments on the petition, DOE 
may establish in a subsequent Decision and Order an alternate test 
procedure

[[Page 63360]]

for the basic models addressed by an Interim Waiver Order.
    Nortek seeks to use an alternate test procedure to test and rate 
the specified ducted, coil-only, two-stage CAC and HP basic models. 
Nortek's alternate test procedure would require the basic models of 
CAC/HPs identified in the petition to be tested according to the test 
procedure at appendix M1, as applicable, except using alternate 
equations in sections 3.3.d, 3.5.1, 3.7.c, and 3.9.1 for part-load test 
conditions. As discussed, these sections of appendix M1 are used to 
calculate adjustments to cooling and heating capacity and adjustments 
to system power consumption to account for the assumed power input of 
the indoor fan for coil-only systems. The alternate test procedure 
requested by Nortek would define lower default fan power coefficients 
and default fan heat coefficients for the part-load tests, instead of 
applying the same coefficients to both the full-load and part-load 
tests, as is done in appendix M1. (Nortek, No. 1 at pp. 4-9)

IV. Denial of Interim Waiver and Request for Comments

    DOE has reviewed Nortek's petition for an interim waiver and the 
alternate test procedure requested by Nortek. In submitting a petition 
for waiver, a petitioner must demonstrate that the subject basic model 
contains one or more design characteristics which either prevent 
testing of the basic model according to the prescribed test procedures 
or cause the prescribed test procedures to evaluate the basic model in 
a manner so unrepresentative of its true energy and/or water 
consumption characteristics as to provide materially inaccurate 
comparative data. 10 CFR 430.27(a)(1). In determining whether to grant 
a request for an interim waiver, DOE considers whether: (1) It appears 
likely that the petition for waiver will be granted; and/or (2) it 
would be desirable for public policy reasons to grant immediate relief 
pending a determination on the petition for waiver. 10 CFR 
430.27(e)(2).
    Nortek does not claim in its petition for waiver that the subject 
basic models contain a design characteristic that prevents testing 
according to DOE test procedure. Instead, Nortek claims that the 
prescribed test procedures evaluate its coil-only, two-stage systems in 
a manner so unrepresentative of their true energy characteristics as to 
provide materially inaccurate comparative data.
    In response to this claim, DOE first notes that default fan power 
coefficients and default fan heat coefficients have been used for both 
full- and part-load operation for many years prior to DOE having 
considered the issue explicitly in a 2005 rulemaking. See 70 FR 59122, 
59128 (October 11, 2005) (``October 2005 Final Rule''). The question of 
whether a lower default fan power coefficient should be used for part-
load operation was considered in the October 2005 Final Rule. After 
consideration of the issue, including consideration of stakeholder 
comments, DOE implemented a single default coefficient value into the 
test procedure. Id. The use of a single default fan power coefficient 
for both full- and part-load capacity was not changed in the most 
recent test procedure final rule (although the value of the coefficient 
was updated, with different values specified for mobile home and space 
constrained versus non-mobile home and non-space-constrained systems). 
82 FR 1426, 1452 (January 5, 2017) (``January 2017 Final Rule). In the 
January 2017 Final Rule, DOE adopted the recommendations, including 
equations to represent the assumed power input of the fan, from a 
working group formed to negotiate a notice of proposed rulemaking for 
energy conservation standards for CAC/HPs. 82 FR 1426, 1452. In 
comments submitted during the course of that rulemaking, manufacturers, 
including Nortek, expressed support for the use of a single default fan 
power coefficient to represent both the full- and part-load test 
conditions for coil-only testing. 82 FR 1426, 1452.
    In its petition for waiver, Nortek claims that lower default fan 
power and fan heat coefficients should be applied to part-load tests. 
The lower coefficients recommended by Nortek are based on its analysis 
that incorporated theoretical fan power (based on fan affinity laws); 
estimates of fan motor efficiency (based on input from motor experts 
and Nortek's internal testing and experience); and estimates of the 
installed base of minimally efficient versus high-efficiency motor 
technologies (based on estimates from the 2015 energy conservation 
standards rulemaking).
    In reviewing Nortek's petition and its proposed alternate test 
procedure, DOE notes that Nortek's analysis is theoretical, based on 
the fan laws and estimates of motor efficiencies that Nortek described 
are based on input from motor experts and its internal testing and 
experience. Real-world fan motor efficiency can deviate, however, from 
theoretically predicted values due to a myriad of factors, which do not 
appear to be reflected in Nortek's analytically-derived estimates. 
Nortek did not submit any data demonstrating that its fan efficiency 
estimates are representative of field performance of furnace fans. As 
such, Nortek has not demonstrated that the fan efficiency values 
suggested in the petition would be more representative than the values 
specified in the current DOE test procedures. In contrast, the analysis 
conducted by DOE to develop the default indoor fan wattage for coil-
only systems for appendix M1 was based on test data and product 
datasheets indicative of the performance of furnace fans in actual 
installation. Id. at 1451-1452. This data set and analytical approach 
was the same used to develop fan wattage levels when operating at the 
reference system external static pressure values for the purposes of 
determining Fan Energy Rating for furnace fans. (79 FR 499, 506; 
January 3, 2014). DOE believes that any consideration of an alternative 
fan wattage factor for part-load operation for coil-only systems should 
be based on a similarly rigorous analysis that includes real-world test 
data. Absent such data, DOE is unable to conclude that Nortek's 
petition for waiver will likely be granted. Further, DOE does not find 
that public policy reasons weigh in favor of granting immediate relief 
pending a determination on the petition for waiver. As discussed 
previously, use of the same default fan power and fan heat coefficients 
for full-load and part-load tests has been the industry standard for 
many years and manufacturers expressed their support for this approach 
in the January 2017 Final Rule. For these reasons, DOE is denying the 
interim waiver and requesting comment.
    DOE makes decisions on waivers and interim waivers for only those 
basic models specifically set out in the petition, not future models 
that may be manufactured by the petitioner. Nortek may submit a new or 
amended petition for waiver and request for grant of interim waiver, as 
appropriate, for additional basic models of ducted, coil-only, two-
stage central air conditioner and heat pumps.
    While DOE declines to approve the use of Nortek's suggested 
alternate test procedure in an interim waiver at this time, DOE may 
consider including an alternate procedure in a subsequent Decision and 
Order. DOE solicits comments from interested parties on all aspects of 
the petition, including any alternate test procedure.

Signing Authority

    This document of the Department of Energy was signed on November 9, 
2021, by Kelly Speakes-Backman, Principal Deputy Assistant Secretary

[[Page 63361]]

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

    Signed in Washington, DC, on November 9, 2021.
Treena V. Garrett,
Federal Register Liaison Officer, U.S. Department of Energy.

Petition for Waiver and Interim Waiver

Date: September 7, 2021

U.S. Department of Energy
Building Technologies Program
1000 Independence Avenue SW, Mailstop EE-5B
Washington, DC 20585-0121

Via email to: [email protected]">A[email protected]

Re: Petitions for Waiver and Interim Waiver on M1 Test Procedure for 2-
Stage Central Air Conditioners and Air Source Heat Pumps

    Dear Sir/Ms.: Nortek Global HVAC, LLC (Nortek) respectfully submits 
petitions for waiver and interim waiver to the Department of Energy 
(DOE) from certain provisions in the federal test procedure for central 
air conditioners and heat pumps in Appendix M1 to Subpart B of 10 CFR 
part 430 (Appendix M1). Specifically, Nortek is requesting waivers for 
ducted, coil only, 2 stage, central air conditioners, and air source 
heat pumps.
    Nortek Global HVAC, LLC (Nortek) has been a world-class 
manufacturer of heating and cooling equipment for 100 years. We pride 
ourselves in upholding our mission of creating a better tomorrow, every 
day. As a company, we can achieve these standards through a unique 
combination of innovation, product performance, and responsive support. 
Nortek Global HVAC and its subsidiaries build and sell HVAC systems 
under the Maytag, Broan, Frigidaire, NuTone, and Reznor brands, among 
others.

I. Introduction

    The federal test procedure in Appendix M1 indicates tests for coil 
only, 2-stage, central air conditioners, and air source heat pumps. 
However, there are errors in the required calculations for capacity 
reduction and increasing power usage during low stage operation. These 
errors cause the prescribed test procedure to evaluate the basic model 
in a manner unrepresentative of its true energy use; thereby, providing 
materially inaccurate comparative data.\1\
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    \1\ See 10 CFR 430.27(a)(1).
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II. List of Basic Models

    Per 10 CFR 430.27(b)(i), Nortek is providing, in appendix I of this 
petition, a list of basic models for which Nortek is seeking a waiver 
and interim waiver from the Appendix M1 test procedure.

III. List of Manufacturers

    Per 10 CFR 430.27(b)(ii), Nortek is providing, in appendix II of 
this petition, a list of other manufacturers known to Nortek that 
distribute into commerce basic models similar in design characteristics 
to the basic models that are the subject of this petition.

IV. Grounds for Petition of Interim Waiver and Waiver

    Appendix M1 Sections 3.3.d, 3.5.1, 3.7.c, and 3.9.1 provide 
equations for decreasing system capacity and increasing power usage for 
mobile home, space constrained, non-mobile home, and non-space 
constrained, ducted, two-stage, coil only systems. However, these 
equations are in error for low-stage operation. M1 incorrectly 
establishes a linear relationship between high stage and low stage 
operation for decreasing Qc\k\(T) and increasing 
[Edot]c\k\(T) where a cubic relationship should be applied. 
Fan affinity laws are very clear and stipulate for a constant wheel 
diameter the relationship between power and air flow rate is:

P1/P2 = (q1/q2)\3\

where:

P1 = low stage power
P2 = high stage power
q1 = low stage air flow
q2 = high stage air flow

Source: https://www.engineeringtoolbox.com/fan-affinity-laws-d_196.html.
    These errors amount to a failure in applying basic engineering 
principles that are fundamental to the design of HVAC systems. 
Furthermore, under the prescribed test procedure, a penalty of as much 
as 1 SEER2 point is realized depending on the application. One SEER2 
point is substantial and renders the performance data incomparable to 
other systems (e.g., single stage, variable speed).
    Nortek understands that fan affinity laws apply only to the fan 
shaft power and do not account for the efficiency of the motor driving 
the fan. To account for motor efficiencies, Nortek has developed the 
below data based on input from motor experts and decades of internal 
testing and experience. This data was reviewed by a major motor 
supplier to the HVAC industry, and the efficiency estimates were 
confirmed to be reasonable but conservative relative to realized 
efficiency in the application.

------------------------------------------------------------------------
                                                     PSC Eff    ECM Eff
                    Air flow %                       estimate   estimate
                                                        %          %
------------------------------------------------------------------------
100...............................................       62.6       80.0
95................................................       59.8       79.0
90................................................       55.2       79.0
85................................................       53.1       79.0
80................................................       50.0       78.5
75................................................       46.9       78.0
------------------------------------------------------------------------

    The 2015 ASRAC negotiated rule for Energy Conservation Standards 
for Central Air Conditioners and Heat Pumps estimated the installed 
base for PSC and ECM motor to be 77% and 23% respectively.\2\ Nortek 
viewed these estimates as conservative in 2015. And, considering the 
Fan Efficiency Rating (FER) regulation was implemented in July 2019, 
it's obvious the installed base is now much more concentrated in ECM 
motors. However, in the interests of maintaining a conservative 
approach to this wavier and interim waiver request, Nortek is 
maintaining the 77%/23% estimates for the purposes of developing 
blended watts/scfm values for a range of airflows. See below table 
which represents our recommendations for non-mobile home, non-space 
constrained, ducted, coil-only, central air conditioning and air source 
heat pump tests.
---------------------------------------------------------------------------

    \2\ https://www.regulations.gov/document/EERE-2014-BT-STD-0048-0044CAC_DefaultFanPowerDRAFTAnalysisSummary_2015-09-16_public.

[[Page 63362]]



--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                    Fan only
                                                   watts/SCFM    PSC Eff      PSC+Fan                   ECM Eff      ECM+fan                   Blended
                   Air flow %                      (excludes    estimate %   watts/SCFM     % PSC      estimate %   watts/SCFM     % ECM     watts/SC FM
                                                     motor)
--------------------------------------------------------------------------------------------------------------------------------------------------------
100.............................................        0.290         62.6        0.464           77         80.0        0.363           23        0.441
95..............................................        0.266         59.8        0.445           77         79.0        0.337           23        0.420
90..............................................        0.226         55.2        0.410           77         79.0        0.287           23        0.382
85..............................................        0.191         53.1        0.359           77         79.0        0.241           23        0.332
80..............................................        0.159         50.0        0.318           77         78.5        0.203           23        0.291
75..............................................        0.131         46.9        0.279           77         78.0        0.168           23        0.254
--------------------------------------------------------------------------------------------------------------------------------------------------------

    See below table which represents our recommendations mobile home, 
space constrained, ducted, coil-only central air conditioning and air 
source heat pump tests.

--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                    Fan only
                                                  watts/OSCFM    PSC Eff      PSC+Fan                   ECM Eff      ECM+fan                   Blended
                   Air flow %                      (excludes    estimate %   watts/SCFM     % PSC      estimate %   watts/SCFM     % ECM     watts/SC FM
                                                     motor)
--------------------------------------------------------------------------------------------------------------------------------------------------------
100.............................................        0.267         62.6        0.427           77         80.0        0.334           23        0.406
95..............................................        0.229         59.8        0.383           77         79.0        0.290           23        0.362
90..............................................        0.195         55.2        0.353           77         79.0        0.247           23        0.329
85..............................................        0.164         53.1        0.309           77         79.0        0.208           23        0.286
80..............................................        0.137         50.0        0.274           77         78.5        0.174           23        0.251
75..............................................        0.113         46.9        0.240           77         78.0        0.145           23        0.218
--------------------------------------------------------------------------------------------------------------------------------------------------------

V. Proposed Alternative Test Procedure

    As required by 10 CFR 430.27(b)(iii), Nortek is providing the 
proposed revisions below to Appendix M1 as the alternative to evaluate 
the performance of the basic models listed in Appendix I of this 
petition. In addition, a redline markup with these revisions of 
Appendix M1 is included as Appendix III.
    Section 3.3.d for mobile home and space constrained ducted coil-
only systems
BILLING CODE 6450-01-P

[[Page 63363]]

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[[Page 63364]]


[GRAPHIC] [TIFF OMITTED] TN16NO21.215


[[Page 63365]]


[GRAPHIC] [TIFF OMITTED] TN16NO21.216


[[Page 63366]]


[GRAPHIC] [TIFF OMITTED] TN16NO21.217


[[Page 63367]]


[GRAPHIC] [TIFF OMITTED] TN16NO21.218

BILLING CODE 6450-01-C

    Where P is the power consumption rate corresponding to the minimum 
airflow rate per the table below. Calculate W/scfm utilizing linear 
interpolation for minimum airflow values in between the values 
indicated.

------------------------------------------------------------------------
                                                          Blended watts/
                       Air flow %                              SCFM
------------------------------------------------------------------------
100.....................................................           0.441
95......................................................           0.420
90......................................................           0.382
85......................................................           0.332
80......................................................           0.291
75......................................................           0.254
------------------------------------------------------------------------

VI. Petitions for Waiver and Interim Waiver

    Per 10 CFR part 430.27(b)(2), Nortek is applying for a waiver and 
interim waiver of the applicable test procedure requirements for the 
basic models listed in Appendix I.
    Given the fundamental engineering technical errors regarding the 
equations for capacity reduction and increasing power usage for low 
stage operation, Nortek contends the petition for waiver is likely to 
be granted. Without waiver relief, Nortek will be forced to make 
representations of efficiency (SEER2) that Nortek knows are understated 
by almost a full SEER2 point resulting in incomparable performance data 
versus other systems (e.g., single stage, variable speed). Nortek 
respectfully requests immediate relief (interim waiver) pending a 
determination of the petition for waiver.
    In addition, Nortek will suffer financial harm if DOE does not 
grant its waiver and interim waiver request. Without an interim waiver, 
Nortek will be forced into overdesigning its twostage central air 
conditioning systems and air source heat pumps by as much as a full 
SEER2 point depending on application. Furthermore, Nortek estimates 
this overdesign to add an incremental cost of approximately [Redacted] 
per unit. To the consumer, a [Redacted] incremental manufacturing cost 
adder amounts to approximately [Redacted] given the multiple steps in 
the distribution channel. Nortek urges DOE to consider the public 
relations difficulties of unnecessarily adding incremental cost and 
misrepresenting the efficiency of these air conditioners to the public.

VII. Closing

    Industry and AHRI are aware of the technical error described in 
this waiver request. And, AHRI has formed a working group to amend 2023 
AHRI Standard 210/240 (Performance Rating for Unitary Air-Conditioning 
and Air-Source Heat Pump Equipment). However, although the proposed 
amendments are fundamentally aligned with Nortek's waiver and interim 
waiver request, Nortek does not believe the 210/240 amendment process 
and likely subsequent DOE test procedure amendments can be completed in 
sufficient time to provide Nortek with opportunity to develop these 
systems in time to meet the January 1, 2023, implementation compliance 
date for central air conditioning and air source heat pump systems. 
Nortek is currently developing these systems and requires certainty 
regarding this waiver and interim waiver to ensure implementation in 
our product designs in time for the January 1, 2023, compliance date 
for central air-conditioning and air-source heat pumps.
    Nortek respectfully requests DOE grant its petitions for waiver and 
interim waiver of the M1 test procedure for the models listed in 
Appendix I. We further request an expedited determination of these 
waivers so that Nortek can promptly continue development of these 
systems to meet the January 1, 2023, SEER2 energy conservation standard 
implementation date. If further information is needed to assist DOE in 
its determination of these waivers, please contact Matt Lattanzi at 
[email protected] (314-604-3996).
    The unredacted version of this waiver and interim waiver request 
contains confidential commercial information within the meaning of 5 
U.S.C. 552(b)(4) and are protected from disclosure under 18 U.S.C. 
1905. Pursuant to 10 CFR 429.7, Nortek requests that this submission be 
treated as confidential and not disclosed pursuant to any FOIA request, 
and declares that: (1) Such information is customarily treated as 
confidential within the industry because its public release would cause 
competitive injury; (2) such information is not generally known by or 
available from other sources; (3) such information has not previously 
been made available to others without obligation concerning the 
information's confidentiality; (4) public disclosure of the information 
would result in competitive injury to Nortek by allowing competitors to 
learn information about Nortek's sales volume; (5) such information 
will not lose its confidential nature due to the passage of time; and 
(6) disclosure of such information would be contrary to the public 
interest because it would undermine free and open competition for the 
sales of covered products, which benefits consumers.

Sincerely,

/s/
Matthew H. Lattanzi,
Senior Director of Regulatory and Legislative Affairs, Nortek Global 
HVAC, LLC, [email protected].

cc:

Appendix I

    The interim waiver and waiver requests apply to the following 
basic models:

----------------------------------------------------------------------------------------------------------------
          Basic model No.                   Brand                    Outdoor unit                Indoor unit
----------------------------------------------------------------------------------------------------------------
SA3BE4M1SN60K.....................  MAYTAG...............  CSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             C+TXV
SA3BE4M1SN60K.....................  MAYTAG...............  CSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             D+TXV
SA3BE4M1SN60K.....................  MAYTAG...............  CSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-C
SA3BE4M1SN60K.....................  MAYTAG...............  CSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-D
SA3BE4M1SN60K.....................  AC PRO...............  FSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             C+TXV
SA3BE4M1SN60K.....................  AC PRO...............  FSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             D+TXV
SA3BE4M1SN60K.....................  AC PRO...............  FSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-C
SA3BE4M1SN60K.....................  AC PRO...............  FSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-D
SA3BE4M1SN60K.....................  BROAN................  FSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             C+TXV

[[Page 63368]]

 
SA3BE4M1SN60K.....................  BROAN................  FSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             D+TXV
SA3BE4M1SN60K.....................  BROAN................  FSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-C
SA3BE4M1SN60K.....................  BROAN................  FSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-D
SA3BE4M1SN60K.....................  FRIGIDAIRE...........  FSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             C+TXV
SA3BE4M1SN60K.....................  FRIGIDAIRE...........  FSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             D+TXV
SA3BE4M1SN60K.....................  FRIGIDAIRE...........  FSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-C
SA3BE4M1SN60K.....................  FRIGIDAIRE...........  FSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-D
SA3BE4M1SN60K.....................  NUTONE...............  FSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             C+TXV
SA3BE4M1SN60K.....................  NUTONE...............  FSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             D+TXV
SA3BE4M1SN60K.....................  NUTONE...............  FSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-C
SA3BE4M1SN60K.....................  NUTONE...............  FSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-D
SA3BE4M1SN60K.....................  ONYX.................  FSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             C+TXV
SA3BE4M1SN60K.....................  ONYX.................  FSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             D+TXV
SA3BE4M1SN60K.....................  ONYX.................  FSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-C
SA3BE4M1SN60K.....................  ONYX.................  FSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-D
SA3BE4M1SN60K.....................  MAYTAG...............  PSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             C+TXV
SA3BE4M1SN60K.....................  MAYTAG...............  PSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             D+TXV
SA3BE4M1SN60K.....................  MAYTAG...............  PSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-C
SA3BE4M1SN60K.....................  MAYTAG...............  PSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-D
SA3BE4M1SN60K.....................  NORTEK GLOBAL HVAC     SA3BE4M1SN60K                    C74B(A,H)M060(C,U)-
                                     LLC.                                                    C+TXV
SA3BE4M1SN60K.....................  NORTEK GLOBAL HVAC     SA3BE4M1SN60K                    C74B(A,H)M060(C,U)-
                                     LLC.                                                    D+TXV
SA3BE4M1SN60K.....................  NORTEK GLOBAL HVAC     SA3BE4M1SN60K                    C74B(A,H)MX60(C,U)-C
                                     LLC.
SA3BE4M1SN60K.....................  NORTEK GLOBAL HVAC     SA3BE4M1SN60K                    C74B(A,H)MX60(C,U)-D
                                     LLC.
SA3BE4M1SN60K.....................  AIRTEMP..............  VSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             C+TXV
SA3BE4M1SN60K.....................  AIRTEMP..............  VSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             D+TXV
SA3BE4M1SN60K.....................  AIRTEMP..............  VSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-C
SA3BE4M1SN60K.....................  AIRTEMP..............  VSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-D
SA3BE4M1SN60K.....................  ALL PRO..............  VSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             C+TXV
SA3BE4M1SN60K.....................  ALL PRO..............  VSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             D+TXV
SA3BE4M1SN60K.....................  ALL PRO..............  VSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-C
SA3BE4M1SN60K.....................  ALL PRO..............  VSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-D
SA3BE4M1SN60K.....................  AireForce............  WSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             C+TXV
SA3BE4M1SN60K.....................  AireForce............  WSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             D+TXV
SA3BE4M1SN60K.....................  AireForce............  WSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-C
SA3BE4M1SN60K.....................  AireForce............  WSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-D
SA3BE4M1SN60K.....................  FRIGIDAIRE...........  WSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             C+TXV
SA3BE4M1SN60K.....................  FRIGIDAIRE...........  WSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             D+TXV
SA3BE4M1SN60K.....................  FRIGIDAIRE...........  WSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-C
SA3BE4M1SN60K.....................  FRIGIDAIRE...........  WSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-D
SA3BE4M1SN60K.....................  GIBSON...............  WSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             C+TXV
SA3BE4M1SN60K.....................  GIBSON...............  WSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             D+TXV
SA3BE4M1SN60K.....................  GIBSON...............  WSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-C
SA3BE4M1SN60K.....................  GIBSON...............  WSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-D
SA3BE4M1SN60K.....................  MAMMOTH..............  WSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             C+TXV
SA3BE4M1SN60K.....................  MAMMOTH..............  WSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             D+TXV
SA3BE4M1SN60K.....................  MAMMOTH..............  WSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-C
SA3BE4M1SN60K.....................  MAMMOTH..............  WSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-D
SA3BE4M1SN60K.....................  NUTONE...............  WSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             C+TXV
SA3BE4M1SN60K.....................  NUTONE...............  WSA3BE4M1SN60K                   C74B(A,H)M060(C,U)-
                                                                                             D+TXV
SA3BE4M1SN60K.....................  NUTONE...............  WSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-C
SA3BE4M1SN60K.....................  NUTONE...............  WSA3BE4M1SN60K                   C74B(A,H)MX60(C,U)-D
SA3BF4M2SN24K.....................  MAYTAG...............  CSA3BF4M2SN24K                   C74B(A,H)MX24(C,U)-A
SA3BF4M2SN24K.....................  MAYTAG...............  CSA3BF4M2SN24K                   C74B(A,H)MX24(C,U)-B
SA3BF4M2SN24K.....................  AC PRO...............  FSA3BF4M2SN24K                   C74B(A,H)MX24(C,U)-A
SA3BF4M2SN24K.....................  AC PRO...............  FSA3BF4M2SN24K                   C74B(A,H)MX24(C,U)-B
SA3BF4M2SN24K.....................  AIREFORCE............  FSA3BF4M2SN24K                   C74B(A,H)MX24(C,U)-A
SA3BF4M2SN24K.....................  AIREFORCE............  FSA3BF4M2SN24K                   C74B(A,H)MX24(C,U)-B
SA3BF4M2SN24K.....................  BROAN................  FSA3BF4M2SN24K                   C74B(A,H)MX24(C,U)-A
SA3BF4M2SN24K.....................  BROAN................  FSA3BF4M2SN24K                   C74B(A,H)MX24(C,U)-B
SA3BF4M2SN24K.....................  FRIGIDAIRE...........  FSA3BF4M2SN24K                   C74B(A,H)MX24(C,U)-A
SA3BF4M2SN24K.....................  FRIGIDAIRE...........  FSA3BF4M2SN24K                   C74B(A,H)MX24(C,U)-B
SA3BF4M2SN24K.....................  NUTONE...............  FSA3BF4M2SN24K                   C74B(A,H)MX24(C,U)-A
SA3BF4M2SN24K.....................  NUTONE...............  FSA3BF4M2SN24K                   C74B(A,H)MX24(C,U)-B
SA3BF4M2SN24K.....................  ONYX.................  FSA3BF4M2SN24K                   C74B(A,H)MX24(C,U)-A
SA3BF4M2SN24K.....................  ONYX.................  FSA3BF4M2SN24K                   C74B(A,H)MX24(C,U)-B
SA3BF4M2SN24K.....................  MAYTAG...............  PSA3BF4M2SN24K                   C74B(A,H)MX24(C,U)-A
SA3BF4M2SN24K.....................  MAYTAG...............  PSA3BF4M2SN24K                   C74B(A,H)MX24(C,U)-B
SA3BF4M2SN24K.....................  NORTEK GLOBAL HVAC     SA3BF4M2SN24K                    C74B(A,H)MX24(C,U)-A
                                     LLC.
SA3BF4M2SN24K.....................  NORTEK GLOBAL HVAC     SA3BF4M2SN24K                    C74B(A,H)MX24(C,U)-B
                                     LLC.
SA3BF4M2SN36K.....................  MAYTAG...............  CSA3BF4M2SN36K                   C74B(A,H)MX36(C,U)-B
SA3BF4M2SN36K.....................  MAYTAG...............  CSA3BF4M2SN36K                   C74B(A,H)MX36(C,U)-C
SA3BF4M2SN36K.....................  AC PRO...............  FSA3BF4M2SN36K                   C74B(A,H)MX36(C,U)-B
SA3BF4M2SN36K.....................  AC PRO...............  FSA3BF4M2SN36K                   C74B(A,H)MX36(C,U)-C
SA3BF4M2SN36K.....................  AIREFORCE............  FSA3BF4M2SN36K                   C74B(A,H)MX36(C,U)-B

[[Page 63369]]

 
SA3BF4M2SN36K.....................  AIREFORCE............  FSA3BF4M2SN36K                   C74B(A,H)MX36(C,U)-C
SA3BF4M2SN36K.....................  BROAN................  FSA3BF4M2SN36K                   C74B(A,H)MX36(C,U)-B
SA3BF4M2SN36K.....................  BROAN................  FSA3BF4M2SN36K                   C74B(A,H)MX36(C,U)-C
SA3BF4M2SN36K.....................  FRIGIDAIRE...........  FSA3BF4M2SN36K                   C74B(A,H)MX36(C,U)-B
SA3BF4M2SN36K.....................  FRIGIDAIRE...........  FSA3BF4M2SN36K                   C74B(A,H)MX36(C,U)-C
SA3BF4M2SN36K.....................  NUTONE...............  FSA3BF4M2SN36K                   C74B(A,H)MX36(C,U)-B
SA3BF4M2SN36K.....................  NUTONE...............  FSA3BF4M2SN36K                   C74B(A,H)MX36(C,U)-C
SA3BF4M2SN36K.....................  ONYX.................  FSA3BF4M2SN36K                   C74B(A,H)MX36(C,U)-B
SA3BF4M2SN36K.....................  ONYX.................  FSA3BF4M2SN36K                   C74B(A,H)MX36(C,U)-C
SA3BF4M2SN36K.....................  MAYTAG...............  PSA3BF4M2SN36K                   C74B(A,H)MX36(C,U)-B
SA3BF4M2SN36K.....................  MAYTAG...............  PSA3BF4M2SN36K                   C74B(A,H)MX36(C,U)-C
SA3BF4M2SN36K.....................  NORTEK GLOBAL HVAC     SA3BF4M2SN36K                    C74B(A,H)MX36(C,U)-B
                                     LLC.
SA3BF4M2SN36K.....................  NORTEK GLOBAL HVAC     SA3BF4M2SN36K                    C74B(A,H)MX36(C,U)-C
                                     LLC.
SA3BF4M2SN48K.....................  MAYTAG...............  CSA3BF4M2SN48K                   C74B(A,H)MX48(C,U)-C
SA3BF4M2SN48K.....................  MAYTAG...............  CSA3BF4M2SN48K                   C74B(A,H)MX48(C,U)-D
SA3BF4M2SN48K.....................  AC PRO...............  FSA3BF4M2SN48K                   C74B(A,H)MX48(C,U)-C
SA3BF4M2SN48K.....................  AC PRO...............  FSA3BF4M2SN48K                   C74B(A,H)MX48(C,U)-D
SA3BF4M2SN48K.....................  AIREFORCE............  FSA3BF4M2SN48K                   C74B(A,H)MX48(C,U)-C
SA3BF4M2SN48K.....................  AIREFORCE............  FSA3BF4M2SN48K                   C74B(A,H)MX48(C,U)-D
SA3BF4M2SN48K.....................  BROAN................  FSA3BF4M2SN48K                   C74B(A,H)MX48(C,U)-C
SA3BF4M2SN48K.....................  BROAN................  FSA3BF4M2SN48K                   C74B(A,H)MX48(C,U)-D
SA3BF4M2SN48K.....................  FRIGIDAIRE...........  FSA3BF4M2SN48K                   C74B(A,H)MX48(C,U)-C
SA3BF4M2SN48K.....................  FRIGIDAIRE...........  FSA3BF4M2SN48K                   C74B(A,H)MX48(C,U)-D
SA3BF4M2SN48K.....................  NUTONE...............  FSA3BF4M2SN48K                   C74B(A,H)MX48(C,U)-C
SA3BF4M2SN48K.....................  NUTONE...............  FSA3BF4M2SN48K                   C74B(A,H)MX48(C,U)-D
SA3BF4M2SN48K.....................  ONYX.................  FSA3BF4M2SN48K                   C74B(A,H)MX48(C,U)-C
SA3BF4M2SN48K.....................  ONYX.................  FSA3BF4M2SN48K                   C74B(A,H)MX48(C,U)-D
SA3BF4M2SN48K.....................  MAYTAG...............  PSA3BF4M2SN48K                   C74B(A,H)MX48(C,U)-C
SA3BF4M2SN48K.....................  MAYTAG...............  PSA3BF4M2SN48K                   C74B(A,H)MX48(C,U)-D
SA3BF4M2SN48K.....................  NORTEK GLOBAL HVAC     SA3BF4M2SN48K                    C74B(A,H)MX48(C,U)-C
                                     LLC.
SA3BF4M2SN48K.....................  NORTEK GLOBAL HVAC     SA3BF4M2SN48K                    C74B(A,H)MX48(C,U)-D
                                     LLC.
SA3BF4M2SN60K.....................  MAYTAG...............  CSA3BF4M2SN60K                   C74B(A,H)MX60(C,U)-C
SA3BF4M2SN60K.....................  MAYTAG...............  CSA3BF4M2SN60K                   C74B(A,H)MX60(C,U)-D
SA3BF4M2SN60K.....................  AC PRO...............  FSA3BF4M2SN60K                   C74B(A,H)MX60(C,U)-C
SA3BF4M2SN60K.....................  AC PRO...............  FSA3BF4M2SN60K                   C74B(A,H)MX60(C,U)-D
SA3BF4M2SN60K.....................  AIREFORCE............  FSA3BF4M2SN60K                   C74B(A,H)MX60(C,U)-C
SA3BF4M2SN60K.....................  AIREFORCE............  FSA3BF4M2SN60K                   C74B(A,H)MX60(C,U)-D
SA3BF4M2SN60K.....................  BROAN................  FSA3BF4M2SN60K                   C74B(A,H)MX60(C,U)-C
SA3BF4M2SN60K.....................  BROAN................  FSA3BF4M2SN60K                   C74B(A,H)MX60(C,U)-D
SA3BF4M2SN60K.....................  FRIGIDAIRE...........  FSA3BF4M2SN60K                   C74B(A,H)MX60(C,U)-C
SA3BF4M2SN60K.....................  FRIGIDAIRE...........  FSA3BF4M2SN60K                   C74B(A,H)MX60(C,U)-D
SA3BF4M2SN60K.....................  NUTONE...............  FSA3BF4M2SN60K                   C74B(A,H)MX60(C,U)-C
SA3BF4M2SN60K.....................  NUTONE...............  FSA3BF4M2SN60K                   C74B(A,H)MX60(C,U)-D
SA3BF4M2SN60K.....................  ONYX.................  FSA3BF4M2SN60K                   C74B(A,H)MX60(C,U)-C
SA3BF4M2SN60K.....................  ONYX.................  FSA3BF4M2SN60K                   C74B(A,H)MX60(C,U)-D
SA3BF4M2SN60K.....................  MAYTAG...............  PSA3BF4M2SN60K                   C74B(A,H)MX60(C,U)-C
SA3BF4M2SN60K.....................  MAYTAG...............  PSA3BF4M2SN60K                   C74B(A,H)MX60(C,U)-D
SA3BF4M2SN60K.....................  NORTEK GLOBAL HVAC     SA3BF4M2SN60K                    C74B(A,H)MX60(C,U)-C
                                     LLC.
SA3BF4M2SN60K.....................  NORTEK GLOBAL HVAC     SA3BF4M2SN60K                    C74B(A,H)MX60(C,U)-D
                                     LLC.
SH3BF4M2SX24K.....................  AC PRO...............  FSH3BF4M2SX24K                   C74B(A,H)MX24(C,U)-A
SH3BF4M2SX24K.....................  AC PRO...............  FSH3BF4M2SX24K                   C74B(A,H)MX24(C,U)-B
SH3BF4M2SX24K.....................  AIREFORCE............  FSH3BF4M2SX24K                   C74B(A,H)MX24(C,U)-A
SH3BF4M2SX24K.....................  AIREFORCE............  FSH3BF4M2SX24K                   C74B(A,H)MX24(C,U)-B
SH3BF4M2SX24K.....................  BROAN................  FSH3BF4M2SX24K                   C74B(A,H)MX24(C,U)-A
SH3BF4M2SX24K.....................  BROAN................  FSH3BF4M2SX24K                   C74B(A,H)MX24(C,U)-B
SH3BF4M2SX24K.....................  FRIGIDAIRE...........  FSH3BF4M2SX24K                   C74B(A,H)MX24(C,U)-A
SH3BF4M2SX24K.....................  FRIGIDAIRE...........  FSH3BF4M2SX24K                   C74B(A,H)MX24(C,U)-B
SH3BF4M2SX24K.....................  NUTONE...............  FSH3BF4M2SX24K                   C74B(A,H)MX24(C,U)-A
SH3BF4M2SX24K.....................  NUTONE...............  FSH3BF4M2SX24K                   C74B(A,H)MX24(C,U)-B
SH3BF4M2SX24K.....................  ONYX.................  FSH3BF4M2SX24K                   C74B(A,H)MX24(C,U)-A
SH3BF4M2SX24K.....................  ONYX.................  FSH3BF4M2SX24K                   C74B(A,H)MX24(C,U)-B
SH3BF4M2SX24K.....................  MAYTAG...............  PSH3BF4M2SX24K                   C74B(A,H)MX24(C,U)-A
SH3BF4M2SX24K.....................  MAYTAG...............  PSH3BF4M2SX24K                   C74B(A,H)MX24(C,U)-B
SH3BF4M2SX24K.....................  NORTEK GLOBAL HVAC     SH3BF4M2SX24K                    C74B(A,H)MX24(C,U)-A
                                     LLC.
SH3BF4M2SX24K.....................  NORTEK GLOBAL HVAC     SH3BF4M2SX24K                    C74B(A,H)MX24(C,U)-B
                                     LLC.
SH3BF4M2SX36K.....................  AC PRO...............  FSH3BF4M2SX36K                   C74B(A,H)MX36(C,U)-B
SH3BF4M2SX36K.....................  AC PRO...............  FSH3BF4M2SX36K                   C74B(A,H)MX36(C,U)-C
SH3BF4M2SX36K.....................  AIREFORCE............  FSH3BF4M2SX36K                   C74B(A,H)MX36(C,U)-B
SH3BF4M2SX36K.....................  AIREFORCE............  FSH3BF4M2SX36K                   C74B(A,H)MX36(C,U)-C
SH3BF4M2SX36K.....................  BROAN................  FSH3BF4M2SX36K                   C74B(A,H)MX36(C,U)-B
SH3BF4M2SX36K.....................  BROAN................  FSH3BF4M2SX36K                   C74B(A,H)MX36(C,U)-C
SH3BF4M2SX36K.....................  FRIGIDAIRE...........  FSH3BF4M2SX36K                   C74B(A,H)MX36(C,U)-B
SH3BF4M2SX36K.....................  FRIGIDAIRE...........  FSH3BF4M2SX36K                   C74B(A,H)MX36(C,U)-C
SH3BF4M2SX36K.....................  NUTONE...............  FSH3BF4M2SX36K                   C74B(A,H)MX36(C,U)-B

[[Page 63370]]

 
SH3BF4M2SX36K.....................  NUTONE...............  FSH3BF4M2SX36K                   C74B(A,H)MX36(C,U)-C
SH3BF4M2SX36K.....................  ONYX.................  FSH3BF4M2SX36K                   C74B(A,H)MX36(C,U)-B
SH3BF4M2SX36K.....................  ONYX.................  FSH3BF4M2SX36K                   C74B(A,H)MX36(C,U)-C
SH3BF4M2SX36K.....................  MAYTAG...............  PSH3BF4M2SX36K                   C74B(A,H)MX36(C,U)-B
SH3BF4M2SX36K.....................  MAYTAG...............  PSH3BF4M2SX36K                   C74B(A,H)MX36(C,U)-C
SH3BF4M2SX36K.....................  NORTEK GLOBAL HVAC     SH3BF4M2SX36K                    C74B(A,H)MX36(C,U)-B
                                     LLC.
SH3BF4M2SX36K.....................  NORTEK GLOBAL HVAC     SH3BF4M2SX36K                    C74B(A,H)MX36(C,U)-C
                                     LLC.
SH3BF4M2SX48K.....................  AC PRO...............  FSH3BF4M2SX48K                   C74B(A,H)MX48(C,U)-C
SH3BF4M2SX48K.....................  AC PRO...............  FSH3BF4M2SX48K                   C74B(A,H)MX48(C,U)-D
SH3BF4M2SX48K.....................  AIREFORCE............  FSH3BF4M2SX48K                   C74B(A,H)MX48(C,U)-C
SH3BF4M2SX48K.....................  AIREFORCE............  FSH3BF4M2SX48K                   C74B(A,H)MX48(C,U)-D
SH3BF4M2SX48K.....................  BROAN................  FSH3BF4M2SX48K                   C74B(A,H)MX48(C,U)-C
SH3BF4M2SX48K.....................  BROAN................  FSH3BF4M2SX48K                   C74B(A,H)MX48(C,U)-D
SH3BF4M2SX48K.....................  FRIGIDAIRE...........  FSH3BF4M2SX48K                   C74B(A,H)MX48(C,U)-C
SH3BF4M2SX48K.....................  FRIGIDAIRE...........  FSH3BF4M2SX48K                   C74B(A,H)MX48(C,U)-D
SH3BF4M2SX48K.....................  NUTONE...............  FSH3BF4M2SX48K                   C74B(A,H)MX48(C,U)-C
SH3BF4M2SX48K.....................  NUTONE...............  FSH3BF4M2SX48K                   C74B(A,H)MX48(C,U)-D
SH3BF4M2SX48K.....................  ONYX.................  FSH3BF4M2SX48K                   C74B(A,H)MX48(C,U)-C
SH3BF4M2SX48K.....................  ONYX.................  FSH3BF4M2SX48K                   C74B(A,H)MX48(C,U)-D
SH3BF4M2SX48K.....................  MAYTAG...............  PSH3BF4M2SX48K                   C74B(A,H)MX48(C,U)-C
SH3BF4M2SX48K.....................  MAYTAG...............  PSH3BF4M2SX48K                   C74B(A,H)MX48(C,U)-D
SH3BF4M2SX48K.....................  NORTEK GLOBAL HVAC     SH3BF4M2SX48K                    C74B(A,H)MX48(C,U)-C
                                     LLC.
SH3BF4M2SX48K.....................  NORTEK GLOBAL HVAC     SH3BF4M2SX48K                    C74B(A,H)MX48(C,U)-D
                                     LLC.
SH3BF4M2SX60K.....................  AC PRO...............  FSH3BF4M2SX60K                   C74B(A,H)MX60(C,U)-C
SH3BF4M2SX60K.....................  AC PRO...............  FSH3BF4M2SX60K                   C74B(A,H)MX60(C,U)-D
SH3BF4M2SX60K.....................  AIREFORCE............  FSH3BF4M2SX60K                   C74B(A,H)MX60(C,U)-C
SH3BF4M2SX60K.....................  AIREFORCE............  FSH3BF4M2SX60K                   C74B(A,H)MX60(C,U)-D
SH3BF4M2SX60K.....................  BROAN................  FSH3BF4M2SX60K                   C74B(A,H)MX60(C,U)-C
SH3BF4M2SX60K.....................  BROAN................  FSH3BF4M2SX60K                   C74B(A,H)MX60(C,U)-D
SH3BF4M2SX60K.....................  FRIGIDAIRE...........  FSH3BF4M2SX60K                   C74B(A,H)MX60(C,U)-C
SH3BF4M2SX60K.....................  FRIGIDAIRE...........  FSH3BF4M2SX60K                   C74B(A,H)MX60(C,U)-D
SH3BF4M2SX60K.....................  NUTONE...............  FSH3BF4M2SX60K                   C74B(A,H)MX60(C,U)-C
SH3BF4M2SX60K.....................  NUTONE...............  FSH3BF4M2SX60K                   C74B(A,H)MX60(C,U)-D
SH3BF4M2SX60K.....................  ONYX.................  FSH3BF4M2SX60K                   C74B(A,H)MX60(C,U)-C
SH3BF4M2SX60K.....................  ONYX.................  FSH3BF4M2SX60K                   C74B(A,H)MX60(C,U)-D
SH3BF4M2SX60K.....................  MAYTAG...............  PSH3BF4M2SX60K                   C74B(A,H)MX60(C,U)-C
SH3BF4M2SX60K.....................  MAYTAG...............  PSH3BF4M2SX60K                   C74B(A,H)MX60(C,U)-D
SH3BF4M2SX60K.....................  NORTEK GLOBAL HVAC     SH3BF4M2SX60K                    C74B(A,H)MX60(C,U)-C
                                     LLC.
SH3BF4M2SX60K.....................  NORTEK GLOBAL HVAC     SH3BF4M2SX60K                    C74B(A,H)MX60(C,U)-D
                                     LLC.
----------------------------------------------------------------------------------------------------------------

Appendix II

    The following are manufacturers of other basic models 
distributed in commerce in the United States and known to Nortek to 
incorporate design characteristics similar to those found in the 
basic models that are the subject of the petition for interim waiver 
and waiver:

 Aaon
 Advanced Distributor Products, LLC
 Allied Air Enterprise, LLC
 Allstyle Coil Company
 Aspen Manufacturing, LLC
 Bosch Thermotechnology Corp
 Carrier Corporation
 ECR International
 Fujitsu General America, Inc.
 GD Midea Heating & Ventilating Equipment Co., LtD.
 Johnson Controls, Inc.
 Lennox International Inc.
 LG Electronics U.S.A., Inc.
 Mitsubishi Electric Cooling and Heating
 Mortex Products, Inc.
 National Comfort Products
 Rheem Manufacturing Company
 Samsung Electronics Co. Ltd.
 Trane Technologies
 Unico, Inc.

[FR Doc. 2021-24903 Filed 11-15-21; 8:45 am]
BILLING CODE 6450-01-P