Notice2026-10483
Energy Conservation Program: Notification of Petition for Waiver of Zhuhai Samyou Environmental Technology Co., Ltd. From the Department of Energy Walk-In Coolers and Walk-In Freezers Test Procedure and Notification of Grant of Interim Waiver
Primary source
Metadata and text below are from the Federal Register, a public-domain U.S. government work. Always verify the official published version before relying on it for any legal matter.
Published
May 27, 2026
Issuing agencies
Energy Department
Abstract
This notification announces receipt of and publishes a petition for waiver and interim waiver from Zhuhai Samyou Environmental Technology Co., Ltd. ("Samyou"), which seeks a waiver for specified walk-in cooler and walk-in freezer ("WICF") basic models from the U.S. Department of Energy ("DOE") test procedure used for determining the efficiency of WICFs. Through this document, DOE also gives notification of its grant of an Interim Waiver Order that requires Samyou to test and rate the specified WICF basic models in accordance with the alternate test procedure set forth in the Interim Waiver Order. DOE solicits comments, data, and information concerning Samyou's petition and its suggested alternate test procedure to inform DOE's final decision on Samyou's waiver request.
Full Text
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<title>Federal Register, Volume 91 Issue 101 (Wednesday, May 27, 2026)</title>
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[Federal Register Volume 91, Number 101 (Wednesday, May 27, 2026)]
[Notices]
[Pages 31435-31445]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2026-10483]
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DEPARTMENT OF ENERGY
[Case Number 2025-001; EERE-2025-BT-WAV-0139]
Energy Conservation Program: Notification of Petition for Waiver
of Zhuhai Samyou Environmental Technology Co., Ltd. From the Department
of Energy Walk-In Coolers and Walk-In Freezers Test Procedure and
Notification of Grant of Interim Waiver
AGENCY: Office of Critical Minerals and Energy Innovation, Department
of Energy.
ACTION: Notification of petition for waiver and grant 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 Zhuhai Samyou Environmental
Technology Co., Ltd. (``Samyou''), which seeks a waiver for specified
walk-in cooler and walk-in freezer (``WICF'') basic models from the
U.S. Department of Energy (``DOE'') test procedure used for determining
the efficiency of WICFs. Through this document, DOE also gives
notification of its grant of an Interim Waiver Order that requires
Samyou to test and rate the specified WICF basic models in accordance
with the alternate test procedure set forth in the Interim Waiver
Order. DOE solicits comments, data, and information concerning Samyou's
petition and its suggested alternate test procedure to inform DOE's
final decision on Samyou's waiver request.
DATES: Written comments, data, and information are requested and will
be accepted on or before June 26, 2026.
ADDRESSES: Interested persons are encouraged to submit comments using
the Federal eRulemaking Portal at <a href="http://www.regulations.gov">www.regulations.gov</a> under docket
number EERE-2025-BT-WAV-0139. Follow the instructions for submitting
comments. Alternatively, interested persons may submit comments,
identified by case number ``2025-001'' and docket number EERE-2025-BT-
WAV-0139, by any of the following methods:
(1) Email: <a href="/cdn-cgi/l/email-protection#d58fbda0bdb4bc86b4b8acbaa087b0b386aca6a1e7e5e7e0a2b4a3e5e4e6ec95b0b0fbb1bab0fbb2baa3"><span class="__cf_email__" data-cfemail="9cc6f4e9f4fdf5cffdf1e5f3e9cef9facfe5efe8aeacaea9ebfdeaacadafa5dcf9f9b2f8f3f9b2fbf3ea">[email protected]</span></a>. Include the
case number [Case No. 2025-001] in the subject line of the message.
(2) Postal Mail: Appliance and Equipment Standards Program, U.S.
Department of Energy, Building Technologies Office, Mailstop CM-5B,
Petition for Waiver Case No. 2025-001, 1000 Independence Avenue SW,
Washington, DC 20585-0121. If possible, please submit all items on a
compact disc (``CD''), in which case it is not necessary to include
printed copies.
(3) Hand Delivery/Courier: Appliance and Equipment Standards
Program, U.S. Department of Energy, Building Technologies Office, 1000
Independence Avenue SW, Washington, DC 20585-0121. Telephone: (202)
287-1445. If possible, please submit all items on a CD, in which case
it is not necessary to include printed copies.
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.
Docket: The docket for this activity, which includes Federal
Register notices, comments, and other supporting documents/materials,
is available for review at <a href="http://www.regulations.gov">www.regulations.gov</a>. All documents in the
docket are listed in the <a href="http://www.regulations.gov">www.regulations.gov</a> index. However, not all
documents listed in the index may be publicly available, such as
information that is exempt from public disclosure.
The docket web page can be found at <a href="http://www.regulations.gov/docket/EERE-2025-BT-WAV-0139">www.regulations.gov/docket/EERE-2025-BT-WAV-0139</a>. The docket web page contains instructions on how
to access all documents, including public comments, in the docket. See
the SUPPLEMENTARY INFORMATION section of this document for information
on how to submit comments through <a href="http://www.regulations.gov">www.regulations.gov</a>.
FOR FURTHER INFORMATION CONTACT:
Mr. Jeremy Dommu, U.S. Department of Energy, Office of Critical
Minerals and Energy Innovation, Building Technologies Office, Mailstop
CM-5B, 1000 Independence Avenue SW, Washington, DC 20585-0121. Email:
<a href="/cdn-cgi/l/email-protection#58190b070f39312e3d2a070a3d292d3d2b2c183d3d763c373d763f372e"><span class="__cf_email__" data-cfemail="6021333f3701091605123f320511150513142005054e040f054e070f16">[email protected]</span></a>.
Mr. Eric Stas, 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) 586-4798. Email:
<a href="/cdn-cgi/l/email-protection#ace9dec5cf82ffd8cddfecc4dd82c8c3c982cbc3da"><span class="__cf_email__" data-cfemail="185d6a717b364b6c796b587069367c777d367f776e">[email protected]</span></a>.
SUPPLEMENTARY INFORMATION:
Table of Contents
I. Request for Comments
II. Authority and Background
III. Samyou's Petition for Waiver and Application for Interim Waiver
IV. Requested Alternative Test Procedure
V. Interim Waiver Order
VI. Approval of the Office of the Secretary
I. Request for Comments
DOE is publishing Samyou's petition for waiver in its entirety,
pursuant to 10 CFR 431.401(b)(1)(iv).\1\ The petition includes a
suggested alternate test procedure to determine the efficiency of
Samyou's WICF systems. DOE is also publishing the Interim Waiver Order
granted to Samyou, which serves as notification of DOE's determination
regarding Samyou's petition for an interim waiver, pursuant to 10 CFR
431.401(e)(3). DOE may consider including the alternate procedure
specified in the Interim Waiver Order in a subsequent Decision and
Order.
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\1\ The petition did not identify any of the information
contained therein as confidential business information.
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DOE invites all interested parties to submit in writing by June 26,
2026, comments and information on all aspects of the petition,
including the alternate test procedure. Pursuant to 10 CFR 431.401(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 Yang Bo, Unit 3-B-2, Building 4, No.1, 7th Technology
Road, Tangjiawan Town, HighTech Zone, Zhuhai, China, 519080. Email:
<a href="/cdn-cgi/l/email-protection#6a010f0444100205040d2a06031c0f440904"><span class="__cf_email__" data-cfemail="88e3ede6a6f2e0e7e6efc8e4e1feeda6ebe6">[email protected]</span></a>.
[[Page 31436]]
Submitting comments via <a href="http://www.regulations.gov">www.regulations.gov</a>. The
<a href="http://www.regulations.gov">www.regulations.gov</a> 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 <a href="http://www.regulations.gov">www.regulations.gov</a> 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 <a href="http://www.regulations.gov">www.regulations.gov</a> cannot be claimed as CBI. Comments received
through the website will waive any CBI claims for the information
submitted. For information on submitting CBI, see the Confidential
Business Information section.
DOE processes submissions made through <a href="http://www.regulations.gov">www.regulations.gov</a> 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 <a href="http://www.regulations.gov">www.regulations.gov</a>
provides after you have successfully uploaded your comment.
Submitting comments via email, hand delivery/courier, or postal
mail. Comments and documents submitted via email, hand delivery/
courier, or postal mail also will be posted to <a href="http://www.regulations.gov">www.regulations.gov</a>. 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 in 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 as long as it does not include any comments.
Include contact information each time you submit comments, data,
documents, and other information to DOE. If you submit via postal mail
or hand delivery/courier, please provide all items on a CD, if
feasible, in which case it is not necessary to submit printed copies.
No telefacsimiles (faxes) will 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. Pursuant 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, postal mail, or hand delivery/courier 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).
Case Number 2025-001
Interim Waiver Order
II. Authority and Background
The Energy Policy and Conservation Act, as amended (``EPCA''),\2\
among other things, authorizes the U.S. Department of Energy (``DOE'')
to regulate the energy efficiency of a number of consumer products and
certain industrial equipment. (42 U.S.C. 6291-6317, as codified) Title
III, Part C \3\ of EPCA established the Energy Conservation Program for
Certain Industrial Equipment, which sets forth a variety of provisions
designed to improve energy efficiency for certain types of industrial
equipment. This equipment includes Walk-in Coolers and Walk-in
Freezers, the focus of this document. (42 U.S.C. 6311(1)(G))
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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, 2020), which reflect the last statutory amendments that impact
Parts A and A-1 of EPCA.
\3\ For editorial reasons, upon codification in the U.S. Code,
Part C was redesignated as 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(a); 42 U.S.C. 6295(s)), and (2) making representations about the
efficiency of that equipment (42 U.S.C. 6314(d)). Similarly, DOE must
use these test procedures to determine whether the equipment complies
with relevant standards promulgated under EPCA. (42 U.S.C. 6316(a); 42
U.S.C. 6295(s))
Under 42 U.S.C. 6314, EPCA sets forth the criteria and procedures
DOE is required to follow when prescribing or amending test procedures
for covered equipment. EPCA requires that any test procedures
prescribed or amended under this section must be reasonably designed to
produce test results which reflect the energy efficiency, energy use,
or estimated annual operating cost of covered equipment during a
representative average use cycle and requires that test procedures not
be unduly burdensome to conduct. (42 U.S.C. 6314(a)(2)) The current
test procedure for walk-in coolers and walk-in freezers is contained in
the Code of Federal Regulations (``CFR'') at 10 CFR part 431, subpart
R, appendix C, Uniform Test Method for the
[[Page 31437]]
Measurement of Net Capacity and AWEF of Walk-In Cooler and Walk-In
Freezer Refrigeration Systems.
Under 10 CFR 431.401, 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 431.401(f)(2). A
petitioner must include in its petition any alternate test procedures
known to the petitioner to evaluate the basic model in a manner
representative of its energy consumption characteristics. 10 CFR
431.401(b)(1)(iii). DOE may grant the waiver subject to conditions,
including adherence to alternate test procedures. 10 CFR 431.401(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 431.401(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 431.401(e)(3). Within one
year of issuance of an interim waiver, DOE will either: (i) publish in
the Federal Register a 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
431.401(h)(1).
If the interim waiver test procedure methodology is different than
the decision and order test procedure methodology, certification
reports to DOE required under 10 CFR 429.12 and any representations
must be based on either of the two methodologies until 180-360 days
after the publication date of the decision and order, as specified by
DOE in the decision and order. Thereafter, certification reports and
any representations must be based on the decision and order test
procedure methodology, unless otherwise specified by DOE. 10 CFR
431.401(i)(1). When DOE amends the test procedure to address the issues
presented in a waiver, the waiver or interim waiver will automatically
terminate on the date on which use of that test procedure is required
to demonstrate compliance. 10 CFR 431.401(h)(3).
III. Samyou's Petition for Waiver and Application for Interim Waiver
On November 23, 2025, DOE received from Samyou a petition for
waiver and interim waiver from the test procedure for walk-in coolers
and walk-in freezers set forth at 10 CFR part 431, subpart R, appendix
C.\4\ (Samyou, No. 1 at p. 10) \5\ Pursuant to 10 CFR 431.401(e)(1),
DOE posted the petition on the DOE website at: <a href="http://www.regulations.gov/document/EERE-2025-BT-WAV-0139-0001">www.regulations.gov/document/EERE-2025-BT-WAV-0139-0001</a>. The petition did not identify any
of the information contained therein as confidential business
information.
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\4\ The specific basic models for which the petition applies are
Samyou VLD-02ZFCLVX3H and MRCOOL MEFDW12D. These basic model names
were provided by Samyou in its November 23, 2025 petition.
\5\ A notation in this form provides a reference for information
that is in the docket for this test procedure waiver (Docket No.
EERE-2025-BT-WAV-0139) (available at: <a href="http://www.regulations.gov/docket/EERE-2025-BT-WAV-0139">www.regulations.gov/docket/EERE-2025-BT-WAV-0139</a>). This notation indicates that the statement
preceding the reference is document number 1 in the docket and
appears at page 10 of that document.
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The American Heating and Refrigeration Institute (AHRI) Standard
1250P (I-P)-2009, titled ``Standard for Performance Rating of Walk-in
Coolers and Freezers'' (``AHRI 1250-2009''), is incorporated by
reference in the test procedure for walk-in cooler refrigeration
systems with certain modifications enumerated in 10 CFR part 431,
subpart R, appendix C. Referencing AHRI 1250-2009, 10 CFR part 431,
subpart R, appendix C provides two possible methods for measuring the
refrigeration capacity of single-package dedicated systems: \6\ the DX
Dual Instrumentation method and the DX Calibrated Box method (see
section C5.1 through C5.1.2 of AHRI 1250-2009). For both methods, the
refrigeration capacity is determined by measuring the enthalpy change
and mass flow rate of the refrigerant (``refrigerant enthalpy
method'').
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\6\ ``Single-packaged dedicated system'' means a refrigeration
system (as defined in 10 CFR 431.302) that is a single-package
assembly that includes one or more compressors, a condenser, a means
for forced circulation of refrigerated air, and elements by which
heat is transferred from air to refrigerant, without any element
external to the system imposing resistance to flow of the
refrigerated air. 10 CFR 431.302.
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Samyou's petition for waiver and interim waiver asserts that their
single-package systems with compact internal configuration and densely
packed components require less space for installation; however, there
is insufficient physical space within the unit to install all
temperature and airflow sensors required by AHRI 1250-2009 without
compromising the integrity of the refrigeration circuit. Samyou further
asserts that retrofitting the models for testing by drilling into the
units or rerouting refrigerant lines would alter the unit's thermal
performance, thereby invalidating results. Samyou asserts that their
single-package system design constitutes a technical barrier that
prevents following the DOE test procedure as currently prescribed, and,
therefore, these models require an alternative test method that yields
accurate, representative, and repeatable energy consumption data
without physically modifying the unit.
Samyou also requested an interim waiver from the existing DOE test
procedure, explaining that absent an interim waiver, it would be unable
to certify and distribute these models in the U.S. market, resulting in
loss of revenue, inability to fulfill existing contracts, competitive
disadvantage to manufacturers who have already been granted similar
waivers, and potential inventory obsolescence and supply chain
disruption. 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
431.401(e)(3).
IV. 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 equipment. (42 U.S.C. 6314(d)) Consistency
is important when making representations about the energy efficiency of
covered equipment, including when demonstrating compliance with
applicable DOE energy conservation standards. Pursuant to 10 CFR
431.401, and after consideration of public comments on the petition,
DOE may establish in a subsequent Decision and Order an alternate test
procedure for the Samyou basic models addressed by the Interim Waiver
Order.
Samyou seeks to use an alternate test procedure to test and rate
specific WICF basic models. Samyou suggested that the specified basic
models be tested according to the test procedure in 10 CFR part 431,
subpart R, appendix C, except that instead of using the refrigerant
enthalpy method to
[[Page 31438]]
determine capacity, the specified basic units be tested using the
indoor air enthalpy and outdoor air enthalpy test methods to determine
capacity.
V. Interim Waiver Order
DOE has reviewed Samyou's application for an interim waiver and the
alternate test procedure requested by Samyou.
As described by Samyou, the subject basic models are unable to be
tested according to the prescribed DOE test procedure without making
significant modifications to the units that would alter their
performance. The alternative test method submitted by Samyou would not
require modifications to the units under test. Additionally, DOE notes
that the alternate test procedure requested by Samyou follows the same
approach as the test procedure waiver previously granted to Store It
Cold \7\ for a unit with similar space constraints.
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\7\ For more information on the Store It Cold waiver, see
<a href="http://www.regulations.gov/document/EERE-2018-BT-WAV-0002-0019">www.regulations.gov/document/EERE-2018-BT-WAV-0002-0019</a>.
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DOE has initially determined that the alternate test procedure
appears to allow for the accurate measurement of the energy efficiency
of the specified basic models, while alleviating the testing problems
cited by Samyou in implementing the DOE test procedure for these WICF
basic models. Consequently, DOE has determined that Samyou's petition
for waiver likely will be granted. Furthermore, DOE has determined that
it is desirable for public policy reasons to grant Samyou immediate
relief pending a determination of the petition for waiver.
For the reasons stated, it is ordered that:
(1) Samyou must test and rate the following WICF basic models with
the alternate test procedure set forth in paragraph (2).
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\8\ The Interim Waiver Order applies only to the WICF system
basic models manufactured by Samyou specified in the petition and
Interim Waiver Order. The Interim Waiver Order does not cover any
other WICF system basic models manufactured by Samyou or any other
manufacturer.
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Brand Basic model \8\
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SAMYOU.................................... VLD-02ZFCLVX3H
MRCOOL.................................... MEFDW12D
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(2) The alternate test procedure for the Samyou basic models
identified in paragraph (1) of this Interim Waiver Order is the test
procedure for WICFs prescribed by DOE at 10 CFR part 431, subpart R,
appendix C,\9\ except that the indoor air enthalpy and outdoor air
enthalpy methods are used instead of the DX Dual Instrumentation method
or the DX Calibrated Box method, as detailed below. All other
requirements of appendix C and DOE's regulations remain applicable.
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\9\ AHRI 1250-2009 is incorporated by reference in the Federal
test procedure at 10 CFR 431.303(b)(2). The alternate test procedure
provides amendments to 10 CFR part 431, subpart R, appendix C that
include required modifications to the test method prescribed in AHRI
1250-2009.
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In 10 CFR part 431, subpart R, appendix C, section 3.1. General
modifications: Test Conditions and Tolerances, revise sections 3.1.1.
and 3.1.4, and add instructions in a new section 3.1.8. regarding
Tables 3 and 4 of AHRI 1250-2009, to read:
3.1.1. In Table 1, Instrumentation Accuracy, refrigerant
temperature measurements shall have a tolerance of <plus-minus>0.5 F
for unit cooler in/out. Temperature measurements used to determine
water vapor content of the air shall be accurate to within <plus-
minus>0.4 F, <plus-minus>1.0 F for all other temperature measurements.
3.1.4. In Tables 2 through 14, the Test Condition Outdoor Wet Bulb
Temperature requirement and its associated tolerance apply only to
units with evaporative cooling and single-packaged dedicated systems.
The condenser-side condensate pan must be dry during performance
measurement test periods.
3.1.8. Tables 3 and 4 shall be modified to read as follows:
Table 3--Fixed Capacity Matched Refrigerator System and Single-Packaged Dedicated System, Condensing Unit Located Indoors
--------------------------------------------------------------------------------------------------------------------------------------------------------
Unit cooler Unit cooler
air entering air entering Condenser air Condenser air
Test description dry-bulb relative entering dry- entering wet- Compressor capacity Test objective
([deg]F) humidity (%) bulb ([deg]F) bulb ([deg]F)
--------------------------------------------------------------------------------------------------------------------------------------------------------
Off-Cycle Fan Power................ 35 <50 .............. .............. Compressor Off........ Measure fan input wattage
during compressor off
cycle.
Refrigeration Capacity............. 35 <50 90 \1\ 75,\2\ 65 Compressor On......... Determine Net Refrigeration
Capacity of Unit Cooler,
input power, and EER at
Rating Condition.
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Note:
\1\ Required only for evaporative Dedicated Condensing Units.
\2\ Maximum allowable value for Single-Packaged Dedicated Systems that do not use evaporative Dedicated Condensing Units, where all or part of the
equipment is located in the outdoor room.
Table 4--Fixed Capacity Matched Refrigerator System and Single-Packaged Dedicated System, Condensing Unit Located Outdoors
--------------------------------------------------------------------------------------------------------------------------------------------------------
Unit cooler Unit cooler
air entering air entering Condenser air Condenser air
Test description dry-bulb relative entering dry- entering wet- Compressor capacity Test objective
([deg]F) humidity (%) bulb ([deg]F) bulb ([deg]F)
--------------------------------------------------------------------------------------------------------------------------------------------------------
Off-Cycle Fan Power................ 35 <50 .............. .............. Compressor Off........ Measure fan input wattage
during compressor off
cycle.
[[Page 31439]]
Refrigeration Capacity A........... 35 <50 95 \1\ 75,\2\ 68 Compressor On......... Determine Net Refrigeration
Capacity of Unit Cooler,
input power, and EER at
Rating Condition.
Refrigeration Capacity B........... 35 <50 59 \1\ 54,\2\ 46 Compressor On......... Determine Net Refrigeration
Capacity of Unit Cooler
and system input power at
moderate condition.
Refrigeration Capacity C........... 35 <50 35 \1\ 34,\2\ 29 Compressor On......... Determine Net Refrigeration
Capacity of Unit Cooler
and system input power at
cold condition.
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Note:
\1\ Required only for evaporative Dedicated Condensing Units.
\2\ Maximum allowable value for Single-Packaged Dedicated Systems that do not use evaporative Dedicated Condensing Units, where all or part of the
equipment is located in the outdoor room.
In 10 CFR part 431, subpart R, appendix C, section 3.2, General
Modifications: Methods of Testing, add the following instructions
regarding additional modifications to the test method prescribed in
appendix C of AHRI 1250-2009:
3.2.9 In appendix C, section C1 reads: Purpose. The purpose of this
appendix is to provide a method of testing for Matched-pair, Single-
packaged Dedicated Systems, as well as unit coolers and Dedicated
Condensing Units tested alone.
3.2.10 In appendix C, section C5 and C5.1 read as follows:
3.2.10.1 C5 reads: C5, Methods of Testing for walk-in cooler and
freezer systems that have matched unit coolers and condensing units.
The testing of the walk-in cooler and freezer systems include a steady-
state test, defrost test, and off-cycle fan power test. For single-
packaged dedicated systems, calculate the refrigeration capacity and
power consumption using the Indoor Air Enthalpy test method and the
Outdoor Air Enthalpy test method. The Indoor Air Enthalpy test method
shall be considered the primary measurement and used to report
capacity. The Outdoor Air Enthalpy test method shall be considered the
secondary measurement and used to calculate the Refrigeration Capacity
Heat Balance. See Section C10 of this appendix for complete details on
each test method.
3.2.10.2 C5.1 reads: The Gross Total Refrigeration Capacity of Unit
Coolers for matched-pairs (not including single-packaged dedicated
systems) from steady-state test shall be determined by either one of
the following methods.
3.2.11 In appendix C, section C7.1 reads: Refer to the standard
rating conditions for a particular application listed in Section 5 of
this standard. Test acceptance criteria listed in Table 2 in section 4
of this standard apply to the Dual Instrumentation and Calibrated Box
methods of test. Single-packaged dedicated system test tolerances are
listed in each applicable Method of Test outlined in section C10.
3.2.12 In appendix C, section C7.2 reads: Data that need to be
recorded during the test are listed in Table C2. For single-packaged
dedicated systems tested in accordance with ASHRAE 37-2009, data that
need to be recorded during the test are listed in ASHRAE 37-2009.
3.2.13 In appendix C, section C6, Test Chambers Requirements, add
C6.3 to read as follows:
C6.3 For all system constructions (Split Systems, Single-packaged
Dedicated Systems, Unit Cooler tested alone, and Dedicated Condensing
Unit tested alone), the Unit Cooler under test may be used to aid in
achieving the required test chamber ambient temperatures prior to
beginning any steady-state test. However, the unit under test must be
free from frost before initiating any steady-state testing.
For single-packaged dedicated systems, refer to the applicable
methods of test for single-packaged dedicated systems listed in section
C10 of this appendix.
In 10 CFR part 431, subpart R, appendix C, section 3.3, Matched
systems, single-packaged dedicated systems, and unit coolers tested
alone, revise the language to read:
3.3 Matched systems, single-packaged dedicated systems, and unit
coolers tested alone: Use the test method in AHRI 1250-2009
(incorporated by reference; see Sec. 431.303), appendix C as the
method of test for matched refrigeration systems, single-packaged
dedicated systems, or unit coolers tested alone, with the modifications
listed below in sections 3.3.1 through 3.3.7.3.2:
In appendix C of AHRI 1250-2009, renumber the following sections
and equations, and references to the following sections and equations,
as follows:
Section C10 to Section C11;
Section C11 to C12;
Section C11.1 to C12.1;
Section C11.1.1 to C12.1.1;
Equation C11 to C12;
Equation C12 to C13;
Section C11.2 to C12.2;
Section C11.3 to C12.3;
Equation C13 to C14;
Equation C14 to C15;
Equation C15 to C16;
Equation C16 to C17;
Section C12 to C13; and
Section C13 to C14.
Insert the following as sections C10 through C10.2.3, and equation
C11:
C10. Single-packaged Test Methods and Allowable Refrigeration
Capacity Heat Balance.
C10.1 Single-packaged Test Methods.
[[Page 31440]]
[GRAPHIC] [TIFF OMITTED] TN27MY26.000
Also see the following website for Figure C3: <a href="http://www.regulations.gov/document/EERE-2018-BT-WAV-0002-0009">www.regulations.gov/document/EERE-2018-BT-WAV-0002-0009</a>.
C10.1.1 Indoor Air Enthalpy Method. Determine Net Refrigeration
Capacity of Unit Cooler and input power in accordance with ASHRAE 37-
2009, Figure C3, and the following modifications.
C10.1.1.1 Space conditioning capacity is determined by measuring
airflow rate and the dry-bub temperature and water vapor content of the
air that enters and leaves the coil. Air enthalpies shall be determined
in accordance with ANSI/ASHRAE 41.6. Entering air is to be sufficiently
dry as to not produce frost on the Unit Cooler coil. Therefore, only
sensible capacity measured by dry bulb change shall be used to
calculate capacity.
C10.1.1.2 Test Setup for Non-Ducted Unit Coolers. A single outlet
plenum box shall be constructed in a cubic arrangement. The length of
the longest dimension of the Unit Cooler outlet shall be used to
determine the dimension of the cube outlet plenum. Four static pressure
taps shall be installed in the center of each face. A 6'' inlet plenum
skirt shall be installed with four static pressure taps at each center
face as well. Airflow shall be adjusted by the exhaust fan on the
airflow plenum to achieve 0.00''WC (<plus-minus> 0.02'' WC).
C10.1.2 Outdoor Air Enthalpy Method. Determine Net Refrigeration
Capacity of Unit Cooler and input power in accordance with ASHRAE 37-
2009, Figure C3, and the following modifications.
C10.1.2.1 Outdoor Air Enthalpy is only applicable on Dedicated
Condensing Units for which the leaving air can be fully captured. Space
conditioning capacity is determined by measuring airflow rate and the
dry-bub temperature and water vapor content of the air that enters and
leaves the coil. Air enthalpies shall be determined in accordance with
ANSI/ASHRAE 41.6. Line loss adjustments in section 7.3.3.4 of ASHRAE
37-2009 are not applicable to package units.
C10.2 Allowable Refrigeration Capacity Heat Balance.
C10.2.1 Following the completion of the steady-state capacity test,
for each rating condition, the measured net capacities of the primary
and secondary test methods must balance within 6%, per Equation C11.
[GRAPHIC] [TIFF OMITTED] TN27MY26.004
C10.2.2 If measured net capacities do not balance per Equation C11,
investigate all potential test facility leaks and/or non-conformances.
If no leaks or non-conformances are detected, proceed to section
C10.2.3. If any leaks or non-conformances are detected, remedy the
concerns and rerun the steady-state test at all applicable rating
condition(s). If the measured net capacities balance per Equation C11,
then the test is considered valid, and capacity and power measurements
from the primary method of the second test will be used. If the
measured net capacities still do not balance per Equation C11, proceed
to section C10.2.3.
C10.2.3 To achieve a capacity heat balance, the test lab may modify
the exterior of the unit under test to reduce
[[Page 31441]]
leakage and surface losses. Specifically, the lab may add insulation to
the outside surface of the single-packaged dedicated system and/or tape
and seal sheet metal edges to minimize outdoor ambient air intrusion to
the Unit Cooler. After the unit is insulated, rerun the steady-state
test at all applicable rating condition(s). If the measured net
capacities balance per Equation C11, then the lab facility and
instrumentation are verified as complying with the applicable method of
test. However, capacity, power, and all downstream calculations will be
based on the results of the primary method from the first test, which
occurred before the unit was altered. If the measured net capacities
still do not balance per Equation C11, then the lab facility and
instrumentation are considered non-compliant, must be remedied, and all
prior tests for the unit under test are considered invalid.
In 10 CFR part 431, subpart R, appendix C, sections 3.3 through
3.3.7.3.2 replace references to AHRI-1250-2009 sections C10, C11,
C11.1, C11.1.1, C11.2, and C11.3, with C11, C12, C12.1, C12.1.1, C12.2,
and C12.3, respectively; and replace references to AHRI-1250-2009
equations C13 and C14 with equations C14 and C15, respectively.
(3) Representations. Samyou may not make representations about the
efficiency of a basic model listed in paragraph (1) of this Interim
Waiver Order for compliance, marketing, or other purposes unless that
basic model has been tested in accordance with the provisions set forth
in this alternate test procedure and such representations fairly
disclose the results of such testing.
(4) This Interim Waiver Order shall remain in effect according to
the provisions of 10 CFR 431.401.
(5) This Interim Waiver Order is issued to Samyou on the condition
that the statements, representations, test data, and documentary
materials provided by Samyou are valid. If Samyou makes any
modifications to the controls or configurations of a basic model
subject to this Interim Waiver Order, such modifications will render
the waiver invalid with respect to that basic model, and Samyou will
either be required to use the current Federal test method or submit a
new application for a test procedure waiver. DOE may rescind or modify
this waiver at any time if it determines the factual basis underlying
the petition for the Interim Waiver Order is incorrect, or the results
from the alternate test procedure are unrepresentative of the basic
model's true energy consumption characteristics. 10 CFR 431.401(k)(1).
Likewise, Samyou may request that DOE rescind or modify the Interim
Waiver Order if Samyou discovers an error in the information provided
to DOE as part of its petition, determines that the interim waiver is
no longer needed, or for other appropriate reasons. 10 CFR
431.401(k)(2).
(6) Issuance of this Interim Waiver Order does not release Samyou
from the applicable requirements set forth at 10 CFR part 429.
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. Samyou may submit a new or
amended petition for waiver and request for grant of interim waiver, as
appropriate, for additional basic models of WICFs. Alternatively, if
appropriate, Samyou may request that DOE extend the scope of a waiver
or an interim waiver to include additional basic models employing the
same technology as the basic model(s) set forth in the original
petition consistent with 10 CFR 431.401(g).
VI. Approval of the Office of the Secretary
The Secretary of Energy has approved publication of this
notification of petition for waiver, grant of interim waiver, and
request for comments.
Signing Authority
This document of the Department of Energy was signed on May 20,
2026, by Audrey Robertson, Assistant Secretary (EERE) for Critical
Minerals and Energy Innovation, 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 May 22, 2026.
Jennifer Hartzell,
Alternate Federal Register Liaison Officer, U.S. Department of Energy.
Petition of Zhuhai Samyou Environmental Technology Co., Ltd.
For Waiver and Application for Interim Waiver of Test Procedure for the
Measurement of Net Capacity and AWEF of Walk-In Cooler and Walk-In
Freezer Refrigeration Systems
Pursuant to 10 CFR 431.401
Submitted by: Zhuhai Samyou Environmental Technology Co., Ltd.
Address: Unit 3-B-2, Building 4, No. 1, 7th Technology Road,
Tangjiawan Town, HighTech Zone, Zhuhai, China 519080.
Contact: Yang Bo.
Date: November 20, 2025.
Basic Modl(s) Subject to Waiver:
Model Brand Product type
VLD-02ZFCLVX3H................ SAMYOU........... DC Inverter Compact
Refrigeration Unit.
MEFDW12D...................... MRCOOL........... DC Inverter Compact
Refrigeration Unit.
I. Grounds for the Waiver Request
The petitioner seeks a waiver from the test procedures prescribed
in Appendix C to Subpart R of 10 CFR part 431 for the above-referenced
basic model(s) because a unique design characteristic of these models
prevents compliance with the standard test methodology.
Specifically, the refrigerated merchandiser units incorporate an
extremely compact internal configuration with densely packed
components. The product picture and installation figure as below.
[[Page 31442]]
[GRAPHIC] [TIFF OMITTED] TN27MY26.001
The compact configuration requires less space for installation and
easy to install on site. But there is insufficient physical space
within the unit to install all temperature and airflow sensors required
by Appendix C to Subpart R of 10 CFR part 431 without compromising the
integrity of the refrigeration circuitry. Any attempt to retrofit the
necessary instrumentation would necessitate drilling into or rerouting
refrigerant lines, which would alter the unit's thermal performance and
invalidate test results.
This design constraint constitutes a legitimate technical barrier
that renders strict adherence to the DOE-prescribed test procedure
impracticable. Therefore, a waiver is necessary to permit the use of an
alternative test method that yields accurate, representative, and
repeatable energy consumption data without physically modifying the
unit's core architecture.
II. Identification of Other Manufacturers With Similar Design
Characteristics
To the best of the petitioner's knowledge, the following
manufacturer distributes basic models in U.S. commerce that incorporate
similarly space-constrained designs, which may also present challenges
in applying the standard Appendix C test procedure:
<bullet> Store It Cold, LLC--Models: CBLW08, Models: CBLW10, Models:
CBLW12, Models: CBLW15, Models: CBLW18, Models: CBLW25
The petitioner acknowledges that definitive public information on
internal design configurations is limited, but based on industry
experience and product teardowns, these manufacturers produce units
with comparable spatial constraints that could impede full sensor
installation per Appendix C.
We also glad to see that DOE has noticed the compact configuration
trend for the product and granted the similar waiver to a manufacturer.
III. Proposed Alternative Test Method
The test procedure for the VLD-02ZFCLVX3H with brand name SAMYOU
and MEFDW12D with brand name MRCOOL is the test procedure for walk-in
cooler refrigeration systems prescribed by DOE at 10 CFR part 431,
subpart R, appendix C \1\ except as detailed below. All other
requirements of 10 CFR part 431, subpart R, appendix C, and DOE's
regulations remain applicable.
---------------------------------------------------------------------------
\1\ AHRI Standard 1250P (I-P)-2009 (``AHRI 1250-2009'') titled
``Standard for Performance Rating of Walk-in Coolers and Freezers''
is incorporated by reference in the federal test procedure at 10 CFR
431.303(b)(2). The alternate test procedure provides amendments 10
CFR part 431, subpart R, appendix C that include required
modifications to AHRI 1250-2009.
---------------------------------------------------------------------------
In 10 CFR part 431, subpart R, appendix C, section 3.1. General
modifications: Test Conditions and Tolerances revise sections 3.1.1.
and 3.1.4., and add instructions in a new section 3.1.8. regarding
Tables 3 and 4 of AHRI 1250-2009, to read:
3.1.1. In Table 1, Instrumentation Accuracy, refrigerant
temperature measurements shall have a tolerance of <plus-minus>0.5 F
for unit cooler in/out. Temperature measurements used to determine
water vapor content of the air shall be accurate to within <plus-
minus>0.4 F, <plus-minus>1.0 F for all other temperature measurements.
3.1.4. In Tables 2 through 14, the Test Condition Outdoor Wet Bulb
Temperature requirement and its
[[Page 31443]]
associated tolerance apply only to units with evaporative cooling and
single-packaged dedicated systems. The condenser-side condensate pan
must be dry during performance measurement test periods.
3.1.8. Tables 3 and 4 shall be modified to read as follows:
Table 3--Fixed Capacity Matched Refrigerator System and Single-Packaged Dedicated System, Condensing Unit Located Indoor
--------------------------------------------------------------------------------------------------------------------------------------------------------
Unit cooler Unit cooler
air entering air entering Condenser air Condenser air
Test description dry-bulb, relative entering dry- entering wet- Compressor capacity Test objective
([deg] F) humidity (%) bulb ([deg] F) bulb ([deg] F)
--------------------------------------------------------------------------------------------------------------------------------------------------------
Off-cycle Fan Power.................. 35 <50 .............. .............. Compressor Off.......... Measure fan input
wattage during
compressor off cycle.
Refrigeration Capacity............... 35 <50 90 \1\ 75,\2\ 65 Compressor On........... Determine Net
Refrigeration Capacity
of Unit Cooler, input
power, and EER at
Rating Condition.
--------------------------------------------------------------------------------------------------------------------------------------------------------
Note:
\1\ Required only for evaporative Dedicated Condensing Units.
\2\ Maximum allowable value for Single-packaged Systems that do not use evaporative Dedicated Condensing Units, where all or part of the equipment is
located in the outdoor room.
Table 4--Fixed Capacity Matched Refrigerator System and Single-Packaged Dedicated System, Condensing Unit Located Outdoor
--------------------------------------------------------------------------------------------------------------------------------------------------------
Unit cooler Unit cooler
air entering air entering Condenser air Condenser air
Test description dry-bulb, relative entering dry- entering wet- Compressor capacity Test objective
([deg] F) humidity (%) bulb ([deg] F) bulb ([deg] F)
--------------------------------------------------------------------------------------------------------------------------------------------------------
Off Cycle Fan Power.................. 35 <50 .............. .............. Compressor Off.......... Measure fan input
wattage during
compressor off cycle.
Refrigeration Capacity A............. 35 <50 95 \1\ 75,\2\ 68 Compressor On........... Determine Net
Refrigeration Capacity
of Unit Cooler, input
power, and EER at
Rating Condition.
Refrigeration Capacity B............. 35 <50 59 \1\ 54,\2\ 46 Compressor On........... Determine Net
Refrigeration Capacity
of Unit Cooler and
system input power at
moderate condition.
Refrigeration Capacity C............. 35 <50 35 \1\ 34,\2\ 29 Compressor On........... Determine Net
Refrigeration Capacity
of Unit Cooler and
system input power at
cold condition.
--------------------------------------------------------------------------------------------------------------------------------------------------------
Note:
\1\ Required only for evaporative Dedicated Condensing Units.
\2\ Maximum allowable value for Single-packaged Dedicated Systems that do not use evaporative Dedicated Condensing Units, where all or part of the
equipment is located in the outdoor room.
In 10 CFR part 431, subpart R, appendix C, section 3.2. General
Modifications: Methods of Testing add the following instructions
regarding additional modifications to appendix C of AHRI 1250-2009:
3.2.9 In appendix C, section C1. reads: Purpose. The purpose of
this appendix is to provide a method of testing for Matched-pair,
Single packaged Dedicated Systems, as well as unit coolers and
Dedicated Condensing Units tested alone.
3.2.10 In appendix C, section C5. and C5.1 read as follows:
3.2.10.1 C5 reads: C5. Methods of Testing for walk-in cooler and
freezer systems that have matched unit coolers and condensing units.
The testing of the walk-in cooler and freezer systems include a steady
state test, defrost test and off-cycle fan power test. For single-
packaged dedicated systems, calculate the refrigeration capacity and
power consumption using the Indoor Air Enthalpy test method and the
Outdoor Air Enthalpy test method. The Indoor Air Enthalpy test method
shall be considered the primary measurement and used to report
capacity. The Outdoor Air Enthalpy test method shall be considered the
secondary measurement and used to calculate the Refrigeration Capacity
Heat Balance. See Section C10 of this appendix for complete details on
each test method.
3.2.10.2 C5.1 reads: The Gross Total Refrigeration Capacity of Unit
Coolers for matched-pairs (not including single-packaged dedicated
systems) from steady state test shall be determined by either one of
the following methods.
3.2.11 In appendix C, section C7.1 reads: Refer to the standard
rating conditions for a particular application listed in Section 5 of
this standard. Test acceptance criteria listed in Table 2 in section 4
of this standard apply to the Dual Instrumentation and Calibrated Box
methods of test. Single-packaged dedicated system test tolerances are
listed in each applicable Method of Test outlined in section C10.
[[Page 31444]]
3.2.12 In appendix C, section C7.2 reads: Data that need to be
recorded during the test are listed in Table C2. For single-packaged
dedicated systems tested in accordance with ASHRAE 37-2009, data that
need to be recorded during the test are listed in ASHRAE 37-2009.
3.2.13 In appendix C, section C6. Test Chambers Requirements, add
C6.3 to read as follows:
C6.3 For all system constructions (Split systems, Single-packaged
dedicated systems, Unit Cooler tested alone, and Dedicated Condensing
Unit tested alone), the Unit Cooler under test may be used to aid in
achieving the required test chamber ambient temperatures prior to
beginning any Steady-state test. However, the unit under test must be
free from frost before initiating any Steady-state testing.
For single-packaged dedicated systems, refer to the applicable
methods of test for single-packaged dedicated systems listed in section
C10 of this appendix.
In 10 CFR part 431, subpart R, appendix C, section 3.3. Matched
systems, single-packaged dedicated systems, and unit coolers tested
alone, revise the language to read:
3.3 Matched systems, single-packaged dedicated systems, and unit
coolers tested alone: Use the test method in AHRI 1250-2009
(incorporated by reference; see Sec. 431.303), appendix C as the
method of test for matched refrigeration systems, single-packaged
dedicated systems, or unit coolers tested alone, with the modifications
listed below in sections 3.3.1 through 3.3.7.3.2.:
In appendix C of AHRI 1250-2009, renumber the following sections
and equations, and references to the following sections and equations,
as follows: Section C10 to Section C11; Section C11 to C12; Section
C11.1 to C12.1; Section C11.1.1 to C12.1.1; Equation C11 to C12;
Equation C12 to C13; Section C11.2 to C12.2; Section C11.3 to C12.3;
Equation C13 to C14; Equation C14 to C15; Equation C15 to C16; Equation
C16 to C17; Section C12 to C13; and Section C13 to C14.
Insert the following as sections C10 through C10.2.3, and equation
C11:
C10. Single-packaged Test Methods and Allowable Refrigeration
Capacity Heat Balance.
C10.1 Single-packaged Test Methods.
[GRAPHIC] [TIFF OMITTED] TN27MY26.002
Also see the following website for Figure C3: <a href="https://www.regulations.gov/document/EERE-2018-BT-WAV-0002-0009">https://www.regulations.gov/document/EERE-2018-BT-WAV-0002-0009</a>.
C10.1.1 Indoor Air Enthalpy Method. Determine Net Refrigeration
Capacity of Unit Cooler and input power in accordance with ASHRAE 37-
2009, Figure C3, and the following modifications.
C10.1.1.1 Space conditioning capacity is determined by measuring
airflow rate and the dry-bub temperature and water vapor content of the
air that enters and leaves the coil. Air enthalpies shall be determined
in accordance with ANSI ASHRAE 41.6.
Entering air is to be sufficiently dry as to not produce frost on
the Unit Cooler coil. Therefore, only sensible capacity measured by dry
bulb change shall be used to calculate capacity.
C10.1.1.2 Test Setup for Non-Ducted Unit Coolers. A single outlet
plenum box shall be constructed in a cubic arrangement. The length of
the longest dimension of the Unit Cooler outlet shall be used to
determine the dimension of the cube outlet plenum. Four static pressure
taps shall be installed in the center of each face. A 6'' inlet plenum
skirt shall be installed with four static pressure taps at each center
face as well. Airflow shall be adjusted by the exhaust fan on the
[[Page 31445]]
airflow plenum to achieve 0.00'' WC (<plus-minus> 0.02'' WC).
C10.1.2 Outdoor Air Enthalpy Method. Determine Net Refrigeration
Capacity of Unit Cooler and input power in accordance with ASHRAE 37-
2009, Figure C3, and the following modifications.
C10.1.2.1 Outdoor Air Enthalpy is only applicable on Dedicated
Condensing Units for which the leaving air can be fully captured. Space
conditioning capacity is determined by measuring airflow rate and the
dry-bub temperature and water vapor content of the air that enters and
leaves the coil. Air enthalpies shall be determined in accordance with
ANSI ASHRAE 41.6. Line loss adjustments in section 7.3.3.4 of ASHRAE
37-2009 are not applicable to package units.
C10.2 Allowable Refrigeration Capacity Heat Balance.
C10.2.1 Following the completion of the Steady-state capacity test,
for each rating condition, the measured net capacities of the primary
and secondary test methods must balance within 6%, per Equation C11.
[GRAPHIC] [TIFF OMITTED] TN27MY26.003
C10.2.2 If measured net capacities do not balance per Equation C11,
investigate all potential test facility leaks and/or non-conformances.
If no leaks or non-conformances are detected, proceed to Section
C10.2.3. If any leaks or non-conformances are detected, remedy the
concerns and rerun the Steady-state test at all applicable rating
condition(s). If the measured net capacities balance per Equation C11,
then the test is considered valid and capacity and power measurements
from the primary method of the second test will be used. If the
measured net capacities still do not balance per Equation C11, proceed
to Section C10.2.3.
C10.2.3 To achieve a capacity heat balance, the test lab may modify
the exterior of the unit under test to reduce leakage and surface
losses. Specifically, the lab may add insulation to the outside surface
of the single-packaged dedicated system and/or tape and seal sheet
metal edges to minimize outdoor ambient air intrusion to the Unit
Cooler. After the unit is insulated, rerun the Steady-state test at all
applicable rating condition(s). If the measured net capacities balance
per Equation C11, then the lab facility and instrumentation are
verified as complying with the applicable method of test. However,
capacity, power, and all downstream calculations will be based on the
results of the primary method from the first test, which occurred
before the unit was altered. If the measured net capacities still do
not balance per Equation C11, then the lab facility and instrumentation
are considered non-compliant, must be remedied, and all prior tests for
the unit under test are considered invalid.
In 10 CFR part 431, subpart R, appendix C, sections 3.3 through
3.3.7.3.2 replace references to AHRI-1250-2009 sections C10, C11,
C11.1, C11.1.1, C11.2, and C11.3, with C11, C12, C12.1, C12.1.1, C12.2,
and C12.3, respectively; and replace references to AHRI-1250-2009
equations C13 and C14 with equations C14 and C15, respectively.
IV. Request for Interim Waiver
In addition to the permanent waiver, the petitioner respectfully
requests an interim waiver pursuant to 10 CFR 431.401(b)(2), pending
final DOE determination on this petition.
Likelihood of Success: The grounds for waiver are well-supported by
engineering evidence and consistent with precedent (e.g., Store It
Cold). The proposed alternative method is technically sound,
reproducible, and aligned with DOE's objective of obtaining accurate
energy use data.
Economic Hardship & Competitive Disadvantage: Absent an interim
waiver, the petitioner will be unable to certify and distribute these
models in the U.S. market. This would result in:
<bullet> Loss of significant sales revenue during the review period
(estimated at $2-5 million annually),
<bullet> Inability to fulfill existing customer contracts and
retailer commitments,
<bullet> Competitive disadvantage relative to manufacturers who
have already secured similar waivers,
<bullet> Potential inventory obsolescence and supply chain
disruption.
Granting an interim waiver is essential to maintain market access
and ensure fair competition while DOE evaluates the full petition.
V. Certification and Signature
I, the undersigned, am authorized to represent the petitioner in
this matter. I have reviewed this petition and confirm that all
statements herein are true, accurate, and complete to the best of my
knowledge and belief.
Signature:-------------------------------------------------------------
Printed Name: Yang Bo.
Title: Quality Manager.
Company: Zhuhai Samyou Environmental Technology Co., Ltd.
Date: November 20, 2025.
[FR Doc. 2026-10483 Filed 5-26-26; 8:45 am]
BILLING CODE 6450-01-P
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