[Federal Register Volume 86, Number 111 (Friday, June 11, 2021)]
[Proposed Rules]
[Pages 31182-31194]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2021-12160]


 ========================================================================
 Proposed Rules
                                                 Federal Register
 ________________________________________________________________________
 
 This section of the FEDERAL REGISTER contains notices to the public of 
 the proposed issuance of rules and regulations. The purpose of these 
 notices is to give interested persons an opportunity to participate in 
 the rule making prior to the adoption of the final rules.
 
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 

  Federal Register / Vol. 86, No. 111 / Friday, June 11, 2021 / 
Proposed Rules  

[[Page 31182]]



DEPARTMENT OF ENERGY

10 CFR Part 431

[EERE-2017-BT-TP-0008]
RIN 1904-AD83


Energy Conservation Program: Test Procedures for Commercial 
Equipment; Early Assessment Review: Commercial Refrigerators, 
Refrigerator-Freezers, and Freezers

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

ACTION: Request for information.

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SUMMARY: The U.S. Department of Energy (``DOE'') is undertaking an 
early assessment review to determine whether amendments are warranted 
for the test procedure for commercial refrigerators, refrigerator-
freezers, and freezers (``CRE''). DOE has identified certain issues 
associated with the currently applicable test procedure on which DOE is 
interested in receiving comment. The issues identified in this document 
concern scope and definitions, industry test standards, test conditions 
for specific CRE categories, test procedure clarifications and 
modifications, alternative refrigerants, certification of volumes, and 
test procedure waivers. DOE welcomes written comments from the public 
on any subject within the scope of this document, including topics not 
raised in this request for information (``RFI'').

DATES: Written comments and information are requested and will be 
accepted on or before July 26, 2021.

ADDRESSES: Interested persons are encouraged to submit comments using 
the Federal eRulemaking Portal at https://www.regulations.gov. Follow 
the instructions for submitting comments. Alternatively, interested 
persons may submit comments, identified by docket number EERE-2017-BT-
TP-0008 and/or RIN 1904-AD83, by any of the following methods:
    1. Federal eRulemaking Portal: httsp://www.regulations.gov. Follow 
the instructions for submitting comments.
    2. Email: To [email protected]. Include docket number EERE-
2017-BT-TP-0008 and/or RIN 1904-AD83 in the subject line of the 
message.
    No telefacsimilies (faxes) will be accepted. For detailed 
instructions on submitting comments and additional information on this 
process, see section III of this document (Submission of Comments).
    Although DOE has routinely accepted public comment submissions 
through a variety of mechanism, including the Federal eRulemaking 
Portal, email, postal mail, or hand delivery/courier, the Department 
has found it necessary to make temporary modifications to the comment 
submission process in light of the ongoing 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 for this activity, which includes Federal 
Register notices, comments, and other supporting documents/materials, 
is available for review at https://www.regulations.gov. All documents 
in the docket are listed in the https://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: https://www.regulations.gov/docket/EERE-2017-BT-TP-0008. The docket web page contains instructions 
on how to access all documents, including public comments, in the 
docket. See section III of this document for information on how to 
submit comments through https://www.regulations.gov.

FOR FURTHER INFORMATION CONTACT: Dr. Stephanie Johnson, U.S. Department 
of Energy, Office of Energy Efficiency and Renewable Energy, Building 
Technologies Office, EE-5B, 1000 Independence Avenue SW, Washington, DC 
20585-0121. Telephone: (202) 287-1943. Email: 
[email protected].
    Peter Cochran, U.S. Department of Energy, Office of the General 
Counsel, GC-33, 1000 Independence Avenue SW, Washington, DC 20585-0121. 
Telephone: (202) 586-9496. Email: [email protected].
    For further information on how to submit a comment or review other 
public comments and the docket, contact the Appliance and Equipment 
Standards Program staff at (202) 287-1445 or by email: 
[email protected].

SUPPLEMENTARY INFORMATION:

Table of Contents

I. Introduction
    A. Authority
    B. Rulemaking History
II. Request for Information
    A. Scope and Definitions
    B. Updates to Industry Test Standards
    C. Test Conditions for Specific CRE Categories
    D. Harmonization of Efficiency Standards and Testing With NSF 7-
2019 Food Safety Provisions
    E. Dedicated Remote Condensing Units
    F. Test Procedure Clarifications and Modifications
    G. Alternative Refrigerants
    H. Certification of Compartment Volume
    I. Test Procedure Waivers
III. Submission of Comments

I. Introduction

    DOE established an early assessment review process to conduct a 
more focused analysis that would allow DOE to determine, based on 
statutory criteria, whether an amended test procedure is warranted. 10 
CFR part 430 subpart C appendix A section 8(a). This RFI requests 
information and data regarding whether an amended test would more 
accurately and fully comply with the requirement that the test 
procedure produce results that measure energy use during a 
representative average use cycle for the equipment, and not be unduly 
burdensome to conduct. To inform interested parties and to facilitate 
this process, DOE has identified several issues associated with the 
currently applicable test procedures on which DOE is interested in 
receiving comment. Based on the information

[[Page 31183]]

received in response to the RFI and DOE's own analysis, DOE will 
determine whether to proceed with a rulemaking for an amended test 
procedure.
    If DOE makes an initial determination that an amended test 
procedure would more accurately or fully comply with statutory 
requirements, or DOE's analysis is inconclusive, DOE would undertake a 
rulemaking to issue an amended test procedure. If DOE makes an initial 
determination based upon available evidence that an amended test 
procedure would not meet the applicable statutory criteria, DOE would 
engage in notice and comment rulemaking before issuing a final 
determination that an amended test procedure is not warranted.

A. Authority

    The Energy Policy and Conservation Act, as amended (``EPCA''),\1\ 
among other things, authorizes DOE to regulate the energy efficiency of 
a number of consumer products and certain industrial equipment. (42 
U.S.C. 6291-6317) Title III, Part C \2\ of EPCA, added by Public Law 
95-619, Title IV, section 441(a) (42 U.S.C. 6311-6317 as codified), 
established the Energy Conservation Program for Certain Industrial 
Equipment, which sets forth a variety of provisions designed to improve 
energy efficiency. This equipment includes CRE, the subject of this 
document. (42 U.S.C. 6311(1)(E))
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    \1\ All references to EPCA in this document refer to the statute 
as amended through the Energy Act of 2020, Public Law 116-260 (Dec. 
27, 2020).
    \2\ For editorial reasons, upon codification in the U.S. Code, 
Part C was redesignated Part A-1.
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    Under EPCA, DOE's energy conservation program 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), test procedures (42 U.S.C. 6314), labeling provisions (42 U.S.C. 
6315), energy conservation standards (42 U.S.C. 6313), and the 
authority to require information and reports from manufacturers (42 
U.S.C. 6316).
    Federal energy efficiency requirements for covered products 
established under EPCA generally supersede State laws and regulations 
concerning energy conservation testing, labeling, and standards. (42 
U.S.C. 6316(a) and 42 U.S.C. 6316(b); 42 U.S.C. 6297) DOE may, however, 
grant waivers of Federal preemption in limited instances for particular 
State laws or regulations, in accordance with the procedures and other 
provisions set forth under 42 U.S.C. 6316(a) and (e) (applying the 
preemption waiver provisions of 42 U.S.C. 6297)).
    EPCA also requires that, at least once every 7 years, DOE evaluate 
test procedures for each type of covered product, including CRE, to 
determine whether amended test procedures would more accurately or 
fully comply with the requirements for the test procedures to not be 
unduly burdensome to conduct and be reasonably designed to produce test 
results that reflect energy efficiency, energy use, and estimated 
operating costs during a representative average use cycle. (42 U.S.C. 
6314(a)(1)) DOE is publishing this RFI to collect data and information 
to inform its decision to satisfy the 7-year-lookback review 
requirement.

B. Rulemaking History

    The current DOE test procedure for CRE is codified in the Code of 
Federal Regulations (``CFR'') at 10 CFR part 431, subpart C, appendix B 
(``Appendix B''). DOE last updated the test procedure in a final rule 
published on April 24, 2014 (``April 2014 Final Rule''). 79 FR 22277. 
Specifically, DOE clarified certain terms, procedures, and compliance 
dates to improve repeatability and provide additional detail compared 
to the prior version of the test procedure. DOE noted that the 
amendments in the April 2014 Final Rule would not affect the measured 
energy use of CRE as measured under the prior version of the test 
procedure. 79 FR 22277, 22280-22281. DOE's current test procedure 
incorporates by reference the following industry standards: (1) Air-
Conditioning, Heating, and Refrigeration Institute (``AHRI'') Standard 
1200 (I-P)-2010 (``AHRI 1200-2010''), ``Performance Rating of 
Commercial Refrigerated Display Merchandisers and Storage Cabinets''; 
(2) the American Society of Heating, Refrigerating, and Air-
Conditioning Engineers (``ASHRAE'') Standard 72-2005 (``ASHRAE 72-
2005''), ``Method of Testing Commercial Refrigerators and Freezers,'' 
which was approved by the American National Standards Institute 
(``ANSI'') on July 29, 2005; and (3) ANSI/Association of Home 
Appliances (``AHAM'') Standard HRF-1-2008 (``AHAM HRF-1-2008''), 
``Energy, Performance, and Capacity of Household Refrigerators, 
Refrigerator-Freezers, and Freezers,'' for determining refrigerated 
volumes for CRE.

II. Request for Information

    DOE is publishing this RFI to collect data and information during 
the early assessment review to inform its decision, consistent with its 
obligations under EPCA, as to whether the Department should proceed 
with an amended test procedure rulemaking, and if so, to assist in the 
development of proposed amendments. Accordingly, in the following 
sections, DOE has identified specific issues on which it seeks input to 
aid in its analysis of whether an amended test procedure for CRE would 
more accurately or fully comply with the requirement that the test 
procedure produces results that measure energy use during a 
representative average use cycle for the product, and not be unduly 
burdensome to conduct. DOE also welcomes comments on other issues 
relevant to its early assessment that may not specifically be 
identified in this document.

A. Scope and Definitions

    CRE means refrigeration equipment that is not a consumer product 
(as defined in 10 CFR 430.2); is not designed and marketed exclusively 
for medical, scientific, or research purposes; operates at a chilled, 
frozen, combination chilled and frozen, or variable temperature; 
displays or stores merchandise and other perishable materials 
horizontally, semi-vertically, or vertically; has transparent or solid 
doors, sliding or hinged doors, a combination of hinged, sliding, 
transparent, or solid doors, or no doors; is designed for pull-down 
temperature applications or holding temperature applications; and is 
connected to a self-contained condensing unit or to a remote condensing 
unit. 10 CFR 431.62.
1. Ice-Cream Freezers
    DOE further defines categories of CRE, including ``ice-cream 
freezer.'' DOE defines an ice-cream freezer as a commercial freezer 
that is designed to operate at or below -5 [deg]F (2 
[deg]F) (-21 [deg]C  1.1 [deg]C) and that the manufacturer 
designs, markets, or intends for the storing, displaying, or dispensing 
of ice cream. 10 CFR 431.62. As such, under this definition, equipment 
not designed, marketed, or intended specifically for the storage, 
display, or dispensing of ice cream, would not be considered an ``ice-
cream freezer,'' regardless of operating temperature.
    A manufacturer's design intent may not always be explicit for all 
CRE. For example, a manufacturer may design a model capable of storing, 
displaying, or dispensing of ice cream, and intend for that operation 
when in use, but only specify technical operating parameters in the 
manufacturer literature for that model with no explicit reference to 
ice cream. In such a case, the

[[Page 31184]]

manufacturer's design intent would be unknown to a third party.
    DOE is considering amendments to the definition of ice-cream 
freezer that would incorporate technical features and characteristics 
to better delineate this equipment from other commercial freezers.
    Issue 1: DOE requests comment on the technical features that 
characterize ice cream freezers and distinguish them from commercial 
freezers capable of operating at or below -5 [deg]F (2 
[deg]F).
    Additionally, the ice-cream freezer definition references ``ice 
cream'', but the term is not specifically defined. Gelato, frozen 
yogurt, and other ice-cream-like products are typically displayed, 
stored, or dispensed in the same manner as ice-cream. The CRE used for 
these food products is likely similar, if not identical, to equipment 
used to store, display, or dispense ice cream.
    Issue 2: DOE requests comment on if further specificity is needed 
for the term ``ice-cream''. DOE is also interested in whether 
manufacturers are certifying equipment intended to store gelato or 
other ice-cream like products as ice-cream freezers or freezers.
    Appendix B requires testing all ice-cream freezers to an integrated 
average temperature (``IAT'') \3\ of -15 [deg]F. However, the term 
``ice-cream freezer'' includes a variety of equipment with a range of 
typical operating temperatures during normal use. For example, certain 
ice-cream freezers are designed to operate considerably below -5 [deg]F 
(sometimes referred to as ``hardening'' cabinets and specifically 
designed for ice cream storage), while other ice-cream freezers are 
designed to operate closer to 0 [deg]F during typical use (e.g., 
``dipping cabinets'' and other equipment used to hold ice cream 
intended for immediate consumption). Ice-cream freezers intended for 
higher-temperature operation are often not capable of achieving an IAT 
of -15 [deg]F. In such an instance, Appendix B requires testing the 
units to the lowest application product temperature (``LAPT'').
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    \3\ Integrated average temperature means the average temperature 
of all test package measurements taken during the test. 10 CFR 
431.62.
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    Of the 445 ice-cream freezer models certified to DOE,\4\ 55 are 
rated based on LAPTs warmer than -15 [deg]F, including 29 models with a 
rating temperature of -5 [deg]F. Many of these models are horizontal or 
service over counter and intended to hold ice cream for immediate 
consumption. Accordingly, testing at an IAT of 0 [deg]F may be more 
representative of typical operation than testing to the LAPT for these 
models.
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    \4\ Based on review of DOE's Compliance Certification Database, 
available at https://www.regulations.doe.gov/certification-data 
(accessed February 5, 2021).
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    If certain ice-cream freezers not capable of reaching an IAT of -15 
[deg]F should instead be tested at an IAT of 0 [deg]F, there may be an 
opportunity to better distinguish between ice-cream freezers and other 
freezers, as discussed earlier in this section. For example, the ice-
cream freezer definition could be revised to refer to any freezer 
capable of operating at an IAT of -15 [deg]F, regardless of the product 
stored in the equipment. Any other equipment currently meeting the ice-
cream freezer definition but not capable of reaching an IAT of -15 
[deg]F would instead be classified and tested as freezers, not ice-
cream freezers. Such an approach would use the measured IAT of the 
equipment as the foundation for this equipment definition, thus 
eliminating the reliance on manufacturer intent or the end use of the 
equipment.
    Issue 3: DOE seeks feedback on whether equipment that meets the 
current ice-cream freezer definition but cannot operate at an IAT of -
15 [deg]F  2 [deg]F should be tested at an IAT of 0 [deg]F 
 2[deg]F instead of the LAPT.
    Issue 4: DOE additionally requests comment on whether the ice-cream 
freezer definition should only refer to equipment that is capable of 
achieving an IAT of -15 [deg]F  2 [deg]F without any 
reference to the manufacturer's designed, marketed, or intended use.
2. High-Temperature CRE
    Section 2.1 of Appendix B requires testing commercial refrigerators 
to an IAT of 38 [deg]F  2 [deg]F. DOE is aware of equipment 
that meets the definition of a commercial refrigerator but is capable 
of operating only at temperatures above the 38 [deg]F  2 
[deg]F IAT required for testing. Consistent with the current test 
procedure, manufacturers certify such equipment using the LAPT setting. 
Examples of these types of equipment include CRE designed for storing 
or displaying chocolate and/or wine, with typical recommended storage 
temperatures around 55 [deg]F.
    DOE is considering adding a definition for ``high-temperature 
refrigerator'' to better delineate commercial refrigerators not capable 
of operating at the IAT required for testing a commercial refrigerator. 
DOE is also considering establishing separate test requirements for 
high-temperature refrigerators, including the IAT required for testing. 
For consumer refrigeration products, DOE established the miscellaneous 
refrigeration product category to capture such products, with 
``coolers'' tested at a standardized cabinet temperature of 55 
[deg]F.\5\
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    \5\ See 10 CFR part 430, subpart B, appendix A, section 3.2.
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    Issue 5: DOE requests comment on whether an IAT of 55 [deg]F  2 [deg]F is an appropriate test condition for commercial high-
temperature refrigerators. DOE also requests data on the typical 
operating temperatures of CRE that operate above an IAT of 38 [deg]F 
 2 [deg]F.
    Issue 6: DOE requests comment on whether any additional changes or 
clarifications are needed to the test procedure to better account for 
the energy consumption of commercial high-temperature refrigerators. 
For example, DOE requests information on whether the current loading 
and door-opening requirements are appropriate for high-temperature CRE.

B. Updates to Industry Test Standards

    As discussed previously, DOE's test procedure for CRE currently 
incorporates by reference AHRI 1200-2010, ASHRAE 72-2005, and AHAM HRF-
1-2008. 10 CFR 431.63. AHRI 1200-2010 also references ASHRAE 72-2005 
and AHAM HRF-1-2008.
    Since establishing the DOE test procedure in Appendix B, AHRI, 
ASHRAE, and AHAM have published updated versions of the referenced test 
standards. On October 1, 2013, ANSI approved an updated version of AHRI 
1200, ANSI/AHRI Standard 1200 (I-P), ``2013 Standard for Performance 
Rating of Commercial Refrigerated Display Merchandizers and Storage 
Cabinets,'' (``AHRI 1200-2013''). On August 1, 2018, ANSI approved an 
updated version of ASHRAE 72, ANSI/ASHRAE Standard 72-2018, ``Method of 
Testing Open and Closed Commercial Refrigerators and Freezers,'' 
(``ASHRAE 72-2018''). AHAM more recently approved and published an 
updated version of its industry test standard, AHAM HRF-1-2019, 
``Energy and Internal Volume of Refrigerating Appliances,'' (``AHAM 
HRF-1-2019''). The changes within these updated industry test standards 
are either editorial, to improve clarity, to better harmonize with the 
DOE test procedure, or relevant to other product types (e.g., consumer 
refrigerators). Based on DOE's initial assessment, the changes in the 
updated versions of the industry test standards would not impact the 
measured energy consumption, volume, or Total Display Area (``TDA'') of 
CRE, as applicable.
    DOE is considering whether to update the current CRE test procedure 
and incorporate by reference the updated

[[Page 31185]]

industry test standards: AHRI 1200-2013, ASHRAE 72-2018, and AHAM HRF-
1-2016. These references would replace previous references to the 
superseded AHRI 1200-2010, ASHRAE 72-2005, and AHAM HRF-1-2008 
standards referenced in the current CRE test procedure.
    DOE is also aware of updates being considered for AHRI 1200-2013 
and ASHRAE 72-2018. DOE has participated in the industry committee 
meetings in which updates to these industry standards are being 
developed. Based on these meetings, the changes being considered by the 
industry committee appear intended largely to improve the clarity, 
consistency, and representativeness of the industry test methods. For 
these and the other referenced industry standards, were DOE to 
determine to propose an amended CRE test procedure, DOE would consider 
adopting the most updated industry test procedures available during the 
course of such a rulemaking.
    Issue 7: DOE requests comment on whether it should reference the 
most recent versions of AHRI 1200 or ASHRAE 72 and whether any of the 
updates to these standards would have an impact on the measured energy 
consumption of CRE, and if so, how. DOE additionally requests comment 
on whether the CRE test procedure should reference the most current 
version of AHAM HRF-1 and whether any of the updates to that standard 
would have an impact on measured volume, and if so, how.
    AHRI has another rating standard applicable to CRE that use a 
secondary coolant or refrigerant, AHRI Standard 1320 (I-P), ``2011 
Standard for Performance Rating of Commercial Refrigerated Display 
Merchandisers and Storage Cabinets for Use With Secondary 
Refrigerants,'' (``AHRI 1320-2011''), approved by ANSI on April 17, 
2012. AHRI 1320-2011 is applicable to cases that are equipped and 
designed to work with electrically driven, medium-temperature, single-
phase secondary coolant systems, but excludes equipment used for low-
temperature applications, secondary coolants involving a phase change 
(e.g., ice slurries or carbon dioxide), and self-contained CRE. AHRI 
1320-2011 includes similar rating temperature conditions as those in 
AHRI 1200-2013 and references ASHRAE 72-2005 and AHAM HRF-1-2008 for 
the measurement of energy consumption and calculation of refrigerated 
volume, respectively. The only substantive differences between AHRI 
1200-2013 and AHRI 1320-2011 are the inclusion of secondary refrigerant 
circulation pump energy consumption in the calculation of total daily 
energy consumption and revised coefficients of performance to determine 
compressor energy consumption. DOE is evaluating AHRI 1320-2011 as a 
potential test method to rate CRE that use secondary refrigerants.
    Issue 8: DOE requests comment on whether AHRI 1320-2011 would be an 
appropriate test method to measure the total daily energy consumption 
of CRE that use a secondary refrigerant circuit, and whether it would 
provide representative measurements of energy use. DOE also seeks 
information and data on CRE designed to work with electrically driven, 
medium-temperature, single-phase secondary coolant systems, including 
the typical field installations and operating conditions.
    Issue 9: DOE also requests comment on whether manufacturers sell or 
plan to sell CRE with secondary coolant that would be outside the 
stated applicability of AHRI 1320-2011, including low-temperature 
equipment or CRE using secondary coolants with a phase change (e.g., 
ice slurries or carbon dioxide), and on whether any other existing test 
standards are appropriate for rating such equipment.

C. Test Conditions for Specific CRE Categories

    DOE has identified specific categories of CRE that are not 
currently subject to the DOE test procedure. These certain categories 
of CRE either cannot be tested using DOE's current test procedure or 
the current test procedure may not be representative of their use. 
These categories are discussed in the following paragraphs. In this 
RFI, DOE is considering whether amendments are warranted to DOE's 
current test procedures to provide for the appropriate testing of such 
categories of CRE. This section discusses potential definitions and 
test procedures for each category of CRE identified. Additionally, the 
U.S. Environmental Protection Agency (``EPA'') ENERGY STAR program 
recently announced that it is considering three of these equipment 
categories for scope expansion and test method development: 
Refrigerated preparation and buffet tables; chef bases or griddle 
stands; and blast chillers and freezers.\6\ DOE will consider 
information gathered through that process when determining whether 
these equipment categories should be defined and included within the 
scope of DOE's CRE test procedure.
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    \6\ Information and materials for ENERGY STAR's Specification 
Version 5.0 process are available at https://www.energystar.gov/products/spec/commercial_refrigerators_and_freezers_specification_version_5_0_pd.
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1. Salad Bars, Buffet Tables and Refrigerated Preparation Tables
    Salad bars, buffet tables, and other refrigerated holding and 
serving equipment, such as refrigerated preparation tables, are CRE 
that store and display perishable items temporarily during food 
preparation or service. These units typically have easily accessible or 
open bins that allow convenient and unimpeded access to the 
refrigerated products. In the April 2014 Final Rule, DOE did not 
include test procedures for this equipment, but maintained that this 
equipment meets the definition of CRE and could therefore be subject to 
future test procedures and energy conservation standards. 77 FR 22278, 
22281. In this RFI, DOE is considering definitions and test procedures 
applicable to salad bars, buffet tables, and refrigerated preparation 
tables.\7\ As discussed in sections II.C.4 and II.C.5 of this RFI, DOE 
is also requesting information on other refrigerated holding and 
serving equipment, including definitions and appropriate test 
procedures.
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    \7\ While the April 2014 Final Rule did not specifically refer 
to refrigerated preparation tables, DOE is considering them in this 
RFI because they have similar features to salad bars and buffet 
tables (e.g., an open top holding refrigerated pans) and are used 
during food preparation.
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    ASTM International F2143-16 ``Standard Test Method for Performance 
of Refrigerated Buffet and Preparation Tables'' (``ASTM F2143-16'') 
provides the following definitions for refrigerated buffet and 
preparation tables:
     Refrigerated buffet and preparation table--equipment 
designed with a refrigerated open top or open condiment rail.
     Refrigerated buffet table or unit--equipment designed with 
mechanical refrigeration that is intended to receive refrigerated food 
and maintain food product temperatures and is intended for customer 
service such as a salad bar. A unit may or may not be equipped with a 
lower refrigerated compartment.
     Refrigerated food preparation unit--equipment designed 
with a refrigerated open top or open condiment rail such as 
refrigerated sandwich units, pizza preparation tables, and similar 
equipment. The unit may or may not be equipped with a lower 
refrigerated compartment.
    DOE will consider these definitions if it determines that 
definitions for these equipment categories are appropriate. DOE notes 
that certain terms used within these definitions are undefined

[[Page 31186]]

(e.g., condiment rails, food product temperatures). Additionally, DOE 
is not aware of any other industry standard definitions for these 
equipment types (nor for salad bars). DOE is requesting feedback to 
better understand the appropriate terms, definitions, and operating 
characteristics of salad bars, buffet tables, and refrigerated 
preparation. This information would inform DOE's decision to group or 
differentiate different types of equipment within this category in any 
eventual definitions or test procedures.
    Issue 10: DOE requests comment on the suitability of the ASTM 
F2143-16 definitions for refrigerated buffet and preparation tables 
(and also their applicability to salad bars) as potential regulatory 
definitions for this equipment. DOE requests comment on whether any 
further delineation of the equipment category, salad bars, buffet 
tables, and refrigerated preparation tables, is necessary to account 
for the range of performance related features available in this 
equipment (e.g., presence of pan covers, refrigerated storage 
compartments, and any other unique configurations or features that may 
require consideration for any potential test procedures).
    Issue 11: DOE requests comment on the specific features and 
equipment capabilities that should be included in definitions for 
refrigerated salad bars, buffet tables, and preparation tables. For 
example, DOE seeks information on the factors that would differentiate 
this equipment from other typical CRE. DOE also requests whether 
potential definitions should specify temperature operating ranges, and 
if so, what the appropriate ranges would be.
    The configuration of salad bars, buffet tables, and refrigerated 
preparation tables may also raise questions as to whether a unit is 
commercial hybrid refrigeration equipment. Commercial hybrid 
refrigeration equipment is a unit of CRE (1) that consists of two or 
more thermally separated refrigerated compartments that are in two or 
more different equipment families, and (2) that is sold as a single 
unit. 10 CFR 431.62. Additional detail may be necessary to distinguish 
between a unit that is a salad bar, buffet table, or refrigerated 
preparation table and a unit that is commercial hybrid equipment that 
includes a salad bar, buffet table, or refrigerated preparation table. 
Refrigerated salad bars, buffet tables, and preparation tables 
typically have removable pans or bins that directly contact the chilled 
air in the refrigerated compartment of the unit. With that 
configuration, the entirety of the chilled compartment and surface pans 
would potentially be considered a refrigerated salad bar, buffet table, 
or preparation table. In contrast, if a unit includes solid partitions 
between the chilled compartment and the pans or bins on top of the 
unit, such a configuration would potentially be considered thermal 
separation and the unit would be considered a commercial hybrid 
consisting of a refrigerated salad bar, buffet table, or preparation 
table with a refrigerator and/or freezer.
    Issue 12: DOE requests comment on whether the presence of thermally 
separating partitions should be considered as a factor to differentiate 
between refrigerated salad bars, buffet tables, and preparation tables 
on the one hand, and commercial hybrid units consisting of a 
refrigerated salad bar, buffet table, or preparation table with a 
refrigerator and/or freezer on the other hand.
    In conjunction with considering definitions for this equipment, DOE 
is also considering whether to adopt a test procedure to evaluate their 
energy consumption. DOE reviewed ASTM F2143-16 and noted several 
differences between this test method and DOE's current test procedure 
for CRE.
    Specifically, ASTM F2143-16 specifies different rating conditions 
for test room dry-bulb temperature and moisture content than the 
current DOE test procedure. Table II-1 summarizes these differences.

               Table II-1--Test Room Dry-Bulb Temperature & Moisture Content Standards Comparison
----------------------------------------------------------------------------------------------------------------
                                                                               Wet bulb
                                                      Test room dry bulb      temperature      Moisture content
         Equipment type              Test standard        temperature          (relative        (lb/lb dry air)
                                                                               humidity)
----------------------------------------------------------------------------------------------------------------
Currently Covered CRE...........  ASHRAE 72-2005      75.2 [deg]F  1.8 [deg]F   minus> 1.8 [deg]F
                                   reference).                             (49-62 percent *).
Buffet and Preparation Tables...  ASTM F2143-16.....    86 [deg]F  2 [deg]F   minus> 1.8 [deg]F
                                                                           * (30-40 percent).
----------------------------------------------------------------------------------------------------------------
* Equivalent value from psychrometric conversion. ASHRAE 72-2005 specifies web bulb temperature, while ASTM
  F2143-16 specifies relative humidity.

    Issue 13: DOE requests comment and supporting data on test room 
dry-bulb temperature and moisture content typically experienced by 
refrigerated salad bars, buffet tables, and preparation tables 
operating in the field. DOE requests comment on whether these 
conditions are significantly different from those encountered by 
conventional CRE and would justify adopting separate rating conditions 
for refrigerated salad bars, buffet tables, and preparation tables.
    For measuring these ambient conditions, ASHRAE 72-2018 and ASTM 
F2143-16 specify the same measurement locations; however, the locations 
may require further specificity depending on the configuration of the 
refrigerated salad bar, buffet table, or preparation table under test. 
For example, is the measurement location based on the highest point of 
the unit under test could be based on the height of the refrigerated 
table surface and pan openings or on the height of any lid or cover 
over the pans, if included. Additionally, the measurement location at 
the center of the unit could be based on the geometric center of the 
unit determined from the height of the open pan surfaces or on the 
geometric center of any door openings (for those units with 
refrigerated compartments below the pan area).
    Issue 14: DOE requests comment on the appropriate locations for 
recording ambient conditions when testing refrigerated salad bars, 
buffet tables, and preparation tables to ensure repeatable and 
reproducible testing for a range of equipment configurations.
    DOE notes that ASTM F2143-16 specifies temperature measurements for 
refrigerated preparation or buffet tables be taken from standardized 
pans filled with distilled water. ASTM F2143-16 also specifies 
measuring the temperature in any chilled compartments for refrigerated 
buffet and preparation tables using three thermocouples in an empty, 
unloaded compartment. DOE's current test procedure, which incorporates 
by reference ASHRAE 72-2005 and AHRI 1200-2010, requires that 
integrated average temperature measurements be taken from test 
simulators consisting of a plastic container filled with a sponge 
saturated with a 2-percent mixture of propylene glycol and distilled 
water. See ASHRAE 72-2005, section 6.2.1. Additionally, the DOE test 
procedure

[[Page 31187]]

requires 70 to 90 percent of the compartment net usable volume to be 
loaded with filler material and test simulators for testing. See ASHRAE 
72-2005, section 6.2.5. Refrigerated salad bars, buffet tables, and 
preparation tables may not typically be loaded to 70 percent of their 
net usable volume due to their use for service rather than long-term 
storage but testing with the refrigerated compartment entirely empty 
also may not be representative of average use.
    Issue 15: DOE requests comment on the appropriateness of using only 
distilled water as the test medium to represent thermo-physical 
properties of foods that are typically stored in the surface pans of 
refrigerated salad bars, preparation tables, or buffet tables. DOE 
requests comment on whether adopting test packages and filler materials 
similar to DOE's current test procedure (as specified in ASHRAE 72-
2005) may better represent the properties of these foods, instead of 
distilled water.
    Issue 16: DOE requests comment on the feasibility of requiring 
temperature measurements in closed refrigerated compartments of 
refrigerated salad bars, buffet tables, and preparation tables using 
test packages as specified in ASHRAE 72, and whether the compartments 
should be loaded with any filler packages (and to what percent of the 
net usable volume) for testing. If the test packages are not 
appropriate for measuring compartment temperatures, DOE requests 
comment on alternatives that should be used instead (e.g., 
thermocouples located in pans filled with distilled water, 
thermocouples as specified in ASTM F2143-16, or weighted 
thermocouples).
    Additionally, ASTM F2143-16 specifies the pans for holding water to 
be standard 4-inch deep \1/6\-size metal steam table pans with a weight 
of 0.70  0.07 lb. ASTM F2143-16 allows for manufacturer 
specified pans if the unit is designed specifically for such pans. DOE 
notes that manufacturers typically specify pan dimensions or provide 
pans for their units, but some manufacturers do not provide a pan depth 
or may specify a range of possible pan depths. DOE also notes that pan 
materials can vary and are not always specified by the manufacturer.
    Issue 17: DOE requests comment on whether pan dimensions should be 
standardized if testing refrigerated salad bars, buffet tables, and 
preparation tables is required, or whether these units should be tested 
with pans meeting manufacturer-recommended pan dimensions. If pans were 
standardized, DOE requests comment on whether the dimensions described 
in ASTM F2143-16 are appropriately representative of what is used, or 
whether another set of dimensions or materials would be more 
appropriate. DOE also requests information on whether the pan material 
should be defined in greater detail, recognizing that ASTM F2143-16 
specifies only that the pans be ``metal.''
    Section 10.5.6 of ASTM F2143-16 specifies that if it is possible to 
control cooling to the display area independently of the refrigerated 
cabinet, the cooling to the display area is turned off and all pans are 
to be moved from the display area to the refrigerated cabinet 
underneath after the active period. The ability to control cooling in 
both the display area and the refrigerated cabinet independently of 
each other suggests that this language applies to units with thermally-
separated compartments and pan areas, which may be considered 
commercial hybrid refrigeration equipment.
    Issue 18: DOE requests comment on whether moving pans from the 
display area to the refrigerated compartment as specified in section 
10.5.6 of ASTM F2143-16 is appropriate for testing refrigerated salad 
bars, buffet tables, and preparation tables. DOE further requests 
feedback on whether storing pans in a refrigerated compartment is 
typical only for those units with certain configurations--e.g., thermal 
separation between the compartment and refrigerated pan area or 
closable covers for the pan area.
    As described, refrigerated salad bars, buffet tables, and 
preparation tables store and display perishable items temporarily 
during food preparation or service. Due to the short duration of use of 
salad bars, buffet tables, and preparation tables, these equipment 
types may not be used for the same 24-hour duration used to 
characterize performance for other categories of CRE. However, ASTM 
F2143-16 specifies a 24-hour test, with an active period of 8 hours and 
a standby period of 16 hours. The active period provisions contain 
instructions for a cover, if equipped: Open for 2 hours, closed for 4 
hours, open for 2 hours. These provisions also contain instructions for 
a door opening sequence: Every 30 minutes, each cabinet door or drawer, 
or both, shall be fully opened sequentially, one at a time, for 6 
consecutive seconds. For units with pass-thru doors, only the doors on 
one side of the unit are opened.
    Issue 19: DOE requests comment on the typical daily usage of 
refrigerated salad bars, buffet tables, and preparation tables. 
Additionally, DOE requests feedback on whether these CRE are used for 
long-term storage of food or only short-term storage during food 
preparation or service periods. DOE also requests comment on whether 
the daily use of this equipment varies depending on configuration or 
other technical characteristics.
    Issue 20: DOE requests comment on the applicability of the ASTM 
F2143-16 door and cover opening specifications. If the ASTM door and 
cover opening requirements are not representative of typical use, DOE 
requests comment on an appropriate door and cover opening sequence. For 
example, DOE requests comment on whether the door-opening requirements 
specified in ASHRAE 72-2018 are appropriate for refrigerated salad 
bars, buffet tables, and preparation tables.
    ASHRAE 72-2018 and ASTM F2143-16 have different loading 
requirements for stabilization. ASTM F2143-16 specifies that the unit 
operates with empty pans for at least 2 hours, water be pre-cooled 
before being loaded into the pans, and, once the water has been loaded 
into the pans, that the thermostat be calibrated until the pan 
temperatures are never outside of 33 [deg]F to 41 [deg]F for any 15-
minute period over a 4-hour measurement period. Although ASHRAE 72-2018 
does not specify how to test units with display pans, it generally 
provides that the unit be loaded with test simulators and filler 
packages and then operated to establish steady-state conditions over 
consecutive 24-hour periods or refrigeration cycles.
    Issue 21: DOE requests comment on the appropriate stabilization 
method to use when testing refrigerated salad bars, buffet tables, and 
preparation tables.
    ASTM F2143-16 instructs that if a buffet or preparation table is 
equipped with a refrigerated compartment, the compartment air 
temperature is to be between 33 [deg]F and 41 [deg]F. Likewise, the 
water temperature of the pans placed in the display area also are to be 
between 33 [deg]F and 41 [deg]F. Alternatively, the DOE test procedure 
for other CRE requires IATs of 38 [deg]F  2.0 [deg]F for 
medium temperature applications. Through preliminary research, DOE has 
found that buffet and preparation tables use a variety of refrigeration 
methods for cooling the pans in the display area and the refrigerated 
compartment. In some configurations, units might not be able to 
maintain all pans and the refrigerated compartment within the specified 
temperature range. For example, units with a single refrigeration 
system and thermostat control for temperatures in either the 
refrigerated compartment or in the pans. As a result, it may be 
possible for only the refrigerated compartment or the pans, but not 
both,

[[Page 31188]]

to be kept within a specified temperature range during operation.
    Issue 22: DOE requests comment on appropriate temperature ranges 
for all pans and compartments during testing, and whether the test 
temperature should be specified as an allowable range or as a target 
IAT with a specified tolerance. Additionally, if a target IAT is 
appropriate, the pans and any refrigerated compartment IAT could be 
measured separately from each other, or all temperature measurement 
locations within the refrigerated compartment and pans could be 
averaged together to determine a single IAT. If separate IATs of the 
pans and the compartment should be used, DOE requests comment on which 
IAT should be used to determine the appropriate thermostat control (if 
the unit only has one overall temperature control).
    ASTM F2143-16 specifies the reporting of ``production capacity,'' 
which is defined as the total volume of the pans when each pan is 
filled within one-half inch of the rim. However, energy consumption of 
refrigerated buffet and preparation tables likely varies with pan 
volume as well as the volume of any closed refrigerated compartments. 
Therefore, both values are of interest when considering metrics that 
define energy performance. Additionally, pan surface area could be 
another possible metric that defines energy performance, similar to TDA 
for horizontal open equipment classes. This method may eliminate the 
variability with different test pan dimensions. However, using either 
pan surface area or TDA as the relevant performance metric may lead to 
difficulty when also accounting for the storage volume of any 
refrigerated compartments in the equipment.
    Issue 23: DOE requests comment on the potential methodologies for 
determining pan volume, pan surface area, and pan TDA, as well as 
refrigerated compartment volume for refrigerated salad bars, buffet 
tables, and preparation tables in a potential test procedure for this 
equipment. DOE additionally requests comment on which parameter(s) 
(e.g., total pan volume, pan surface area, TDA, or a combined metric), 
may best represent the useful ``capacity'' of this equipment.
    ASTM F2143-16 does not account for defrost cycles when testing this 
equipment, other than indicating in the test report whether a defrost 
cycle occurred. ASHRAE 72-2018 directs that the test period begins with 
a defrost cycle. Defrost cycles increase the energy consumption of 
refrigeration equipment; however, through preliminary research, DOE has 
found that most refrigerated salad bars, buffet tables and preparation 
tables use off-cycle defrosts, which melt any frost accumulation 
through the evaporator fan running during a compressor off-cycle. This 
method of defrost does not actively introduce heat to melt the 
accumulated frost and may occur during the compressor's normal cycling 
operation (i.e., there may not be an identifiable defrost occurrence in 
the measured test data).
    Issue 24: DOE requests comment on whether a possible test procedure 
should consider defrost cycles for refrigerated salad bars, buffet 
tables, and preparation tables, and if so, how.
2. Pull-Down Temperature Applications
    As defined, a CRE must be designed for holding temperature 
applications \8\ or pull-down temperature applications. 10 CFR 431.62 
(42 U.S.C. 6311(9)(A)(vi)) ``Pull-down temperature application'' is a 
commercial refrigerator with doors that, when fully loaded with 12-
ounce beverage cans at 90 [deg]F, can cool those beverages to an 
average stable temperature of 38 [deg]F in 12 hours or less. 10 CFR 
431.62 (42 U.S.C. 6311(9)(D)). CRE within this definition are typically 
known as beverage merchandisers or beverage coolers because of their 
use in displaying individually packaged beverages for sale, and their 
ability to rapidly cool such beverages. Such equipment with transparent 
doors is currently subject to DOE's test procedures set forth at 10 CFR 
431.64 and required to comply with the energy conservation standards 
specified at 10 CFR 431.66(e).
---------------------------------------------------------------------------

    \8\ ``Holding temperature application'' means a use of 
commercial refrigeration equipment other than a pull-down 
temperature application, except a blast chiller or freezer. 10 CFR 
431.62 (42 U.S.C. 6311(9)(B)).
---------------------------------------------------------------------------

    DOE's current CRE test procedure does not include any procedure to 
verify a unit's pull-down performance for CRE meeting the pull-down 
temperature application definition. For example, the test procedure 
does not provide instructions for the starting conditions of the 
equipment (e.g., whether the equipment begins the test in a pre-cooled 
state or at ambient temperature conditions), loading of the cans (e.g., 
whether the equipment must be loaded to full within a certain amount of 
time), or how to measure the temperature of the cans to confirm cooling 
to 38 [deg]F.
    Issue 25: DOE seeks information on whether CRE that provides pull-
down temperature applications is sufficiently differentiated from other 
types of CRE. If not, DOE seeks comment on how manufacturers currently 
determine whether a model meets the pull-down temperature application 
criteria. DOE requests comment on appropriate starting conditions, 
loading methods, and other necessary specifications for a potential 
test method to verify the pull-down performance of a commercial 
refrigerator.
    Whereas the current CRE test procedure specifies that commercial 
refrigerators designed for pull-down applications be tested at steady 
state (see 10 CFR 431.64(b), and Appendix B section 2.1), pull-down 
periods may account for a substantial amount of the energy these models 
consume in actual operation. In order to better reflect the 
representative energy consumption associated with pull-down periods, 
DOE is considering revising the test method for commercial 
refrigerators designed for pull-down applications to also reflect 
energy consumption during the pull-down period.
    Issue 26: DOE requests comment and supporting data on the energy 
consumption associated with pull-down operation for commercial 
refrigerators designed for pull-down temperature applications, 
including the amount of time these models typically spend in both pull-
down conditions and steady-state operation. DOE additionally requests 
comment on whether a modified test method (i.e., one that accounts for 
both pull-down and steady state performance) might be more appropriate 
to represent the energy consumption of equipment in this class.
    While the cooling criteria in the pull-down temperature application 
definition is in terms of cooling beverage cans, the definition is not 
explicitly limited to beverage merchandisers and beverage coolers. 
Other equipment with solid doors intended to rapidly cool or freeze 
food, commonly referred to as blast chillers and blast freezers, may 
also meet the pull-down temperature application definition. DOE does 
not define blast chiller and/or blast freezers. The California Code of 
Regulations (``CCR'') defines a blast chiller as a refrigerator 
designed to cool food products from 140 [deg]F to 40 [deg]F within four 
hours. (CCR, Title 20, section 1602) DOE seeks comment on whether there 
is equipment that is not a beverage merchandiser or beverage cooler, 
but that would meet the pull-down temperature application definitions.
    Issue 27: DOE requests comment on whether definitions are needed 
for blast chillers and blast freezers to further delineate the 
equipment subject to the DOE test procedures and standards. If 
definitions are needed, DOE requests comment on the appropriate 
definitions for blast chillers and blast freezers, including how to 
differentiate such

[[Page 31189]]

equipment from CRE currently subject to testing and compliance with 
DOE's energy conservation standards.
    DOE is not aware of any existing test methods for assessing the 
energy performance of equipment generally considered blast chillers and 
blast freezers. ASHRAE has established a standard project committee 
(``SPC'') to consider the development of an industry test standard for 
this equipment: SPC 220P, Method of Testing for Rating Small Commercial 
Blast Chillers, Chiller-Freezers, and Freezers.\9\ DOE is participating 
in this process and will consider referencing publicly available 
industry standards as may be appropriate in any future test procedure 
rulemaking. DOE is requesting information on typical blast chiller and 
blast freezer operation to evaluate any eventual test methods available 
for this equipment
---------------------------------------------------------------------------

    \9\ See https://www.ashrae.org/technical-resources/standards-and-guidelines/project-committee-interim-meetings.
---------------------------------------------------------------------------

    Issue 28: DOE requests comment and supporting data on the typical 
ambient conditions experienced by blast chillers and blast freezers.
    Issue 29: DOE requests comment and supporting data on the typical 
usage settings for blast chillers and blast freezers and how different 
set-point modes affect energy performance. For units with multiple 
temperature settings within the refrigerator or freezer temperature 
range, DOE requests comment on which setting is appropriate for 
testing. Additionally, for units with settings that affect the pull-
down duration, DOE requests comment on whether the fastest or slowest 
setting (or any other setting if more than two settings are provided) 
should be used for testing.
3. Chef Bases and Griddle Stands
    DOE defines ``chef base or griddle stand'' as CRE that is designed 
and marketed for the express purpose of having a griddle or other 
cooking appliance placed on top of it that is capable of reaching 
temperatures hot enough to cook food. 10 CFR 431.62. In this RFI, DOE 
is requesting information and feedback regarding definitions and test 
procedures for chef bases and griddle stands.
    As discussed in the April 2014 Final Rule, the explicit 
categorization of griddle stands is meant to accommodate equipment that 
experiences temperatures exceeding 200 [deg]F. 79 FR 22278, 22282. 
However, DOE notes that the current definition for chef bases and 
griddle stands does not specify a quantitative means for determining 
the equipment that meets the definition, such as a temperature rating 
for cooking appliances placed on top of chef bases and griddle stands 
or specifications for the refrigeration systems to differentiate this 
equipment from typical CRE. Also, the DOE test procedure does not 
specify unique temperature test conditions for this equipment.
    Issue 30: DOE requests comment on whether the definition for chef 
bases and griddle stands should be modified to include a specific 
temperature requirement for cooking appliances placed on top of chef 
bases and griddle stands, or other such specification. Specifically, 
DOE requests feedback on a quantifiable characteristics of chef bases 
and griddle stands that differentiate this equipment from other CRE. 
This includes information on appropriate temperature ranges and 
refrigeration system characteristics that could be used to classify 
equipment as chef bases and griddle stands.
    DOE stated in the April 2014 Final Rule that chef bases and griddle 
stands are able to be tested according to the DOE test procedure, but 
their refrigeration systems require larger compressors to provide more 
cooling capacity per storage volume than equipment with compressors 
that are appropriately sized for conventional CRE and more typical room 
temperature conditions. As a result, this equipment tends to consume 
more energy than similarly sized, conventional CRE models. 79 FR 22278, 
22281-22282. Although this equipment can be tested using DOE's current 
test procedure, the test room temperature conditions specified in DOE's 
test procedure may not represent the conditions experienced by chef 
bases and griddle stands in the field, due to the cooking equipment 
installed on top of such equipment. Specifically, the current CRE test 
procedure may not appropriately specify installation and setup for chef 
bases and griddle stands to reflect real-world conditions.
    Issue 31: DOE requests comment on whether modifications to the 
current CRE test procedure would be appropriate for testing chef bases 
and griddle stands to better represent real-world use conditions. DOE 
specifically requests supporting data on the time per day that top-
mounted cooking equipment is active, as well as typical temperatures of 
the cooking equipment when active, to gain an understanding of the 
magnitude of the resulting thermal loads. DOE also requests comment on 
whether the existing DOE test procedure is appropriate for measuring 
the energy use of this equipment.
4. Mobile Refrigerated Cabinets
    DOE does not currently define or specify test procedures for other 
types of refrigerated holding and serving equipment such as certain 
mobile refrigerated cabinets. As discussed in the April 2014 Final 
Rule, DOE determined that such other types of refrigerated holding and 
serving equipment meet the definition of CRE and could be subject to 
future test procedures and energy conservation standards. 79 FR 22278, 
22281. Specifically, mobile refrigerated cabinets chill the 
refrigerated compartment before being unplugged from power and taken to 
a remote location to hold food products while maintaining cooling. Such 
equipment meets the definition of CRE as defined at 10 CFR 431.62; 
however, unlike most typical CRE, mobile refrigerated cabinets are not 
continuously connected to a power supply. To better distinguish mobile 
refrigerated cabinets from other defined categories of CRE, DOE is 
considering developing definitions for this equipment.
    Issue 32: DOE seeks information on the design features and 
operating characteristics of mobile refrigerated cabinets that would 
differentiate this equipment from other CRE or refrigerated salad bars, 
buffet tables, and preparation tables.
    In addition to definitions, DOE is considering whether to develop a 
test procedure for mobile refrigerated cabinets. The operating 
conditions, installation locations, and usage characteristics for this 
equipment are likely very different compared to typical CRE. For 
example, as discussed, mobile refrigerated cabinets are not 
continuously connected to a power supply and may not have typical door 
openings for user access. To determine appropriate test procedures to 
evaluate the energy consumption of this equipment, DOE is requesting 
information on any characteristics of their operation. DOE is not aware 
of any industry standards that address performance of mobile 
refrigerated cabinets.
    Issue 33: DOE requests comment on what test conditions (e.g., 
temperature, moisture content) would be appropriate in a potential test 
procedure for mobile refrigerated cabinets, given that this equipment 
often operates in unique conditions and applications. DOE additionally 
requests comment on appropriate specifications for door openings, 
stabilization and test periods, and installation configurations for 
mobile refrigerated cabinets (including representative operating times 
when

[[Page 31190]]

connected and disconnected from a power supply). DOE seeks any data 
describing how these units are used in the field to help inform 
potential appropriate test conditions and procedures.
5. Additional Covered Equipment
    DOE understands that there may be additional equipment available on 
the market that meet the definition for CRE, but otherwise do not meet 
the definitions for the existing equipment classes or additional 
equipment categories described in this section. One such example may be 
a unit used to chill and dispense condiments--for example cream in a 
coffee shop. Such units would meet the general CRE definition but may 
have different operation and customer use compared to equipment covered 
under the existing CRE equipment categories (e.g., fewer door openings 
only for re-loading the product).
    Issue 34: DOE requests feedback from interested parties on what 
other CRE may be available on the market that would require separate 
equipment category definitions and test procedures. Specifically, DOE 
seeks information on the relevant equipment features and utilities that 
would require separate equipment categories, as well as the impact of 
those features and utilities on energy use and whether the current test 
procedure would provide results of those impacts. DOE also requests any 
available information on potential definitions, test procedures, and 
usage data (specifically, how the typical daily energy use of the 
unique design compares to energy use of a unit of the most similar CRE 
equipment class) for these equipment categories.
    Issue 35: DOE also requests comment on whether it should establish 
a definition for ``other refrigerated holding and serving equipment'' 
to clearly delineate equipment not currently subject to DOE's test 
procedure. DOE seeks feedback on an appropriate definition, and on the 
types of equipment it should cover.
    Furthermore, DOE understands that there may be CRE that are 
currently categorized into existing equipment classes but may require 
different test requirements to reflect typical field usage. One example 
may be CRE that are typically used in cafeteria settings to store and 
provide access to cartons of milk, often referred to as ``milk 
coolers.'' Milk coolers may have longer door openings during a 
relatively short period of the day (i.e., ``lunch hour''). Another such 
example may be CRE that are specifically designed to only operate 
outdoors. Such units may operate in different real-world ambient 
conditions compared to the other CRE (and the DOE test procedure). 
Similarly, unique shelves or loading configurations may require 
additional test instructions. For example, the DOE test procedure 
loading requirements may not be appropriate (or possible) for floral 
display merchandisers with unique shelf setups.
    Issue 36: DOE requests feedback from interested parties on whether 
any additional or different test requirements are needed for CRE that 
meet the definitions for the existing equipment classes but may have 
sufficiently unique applications from other equipment in the same 
class. Specifically, DOE seeks information on how these requirements 
should be addressed in the test procedure and how the equipment's 
typical usage in the field is different than other CRE within the 
respective equipment class. DOE also requests comment and information 
on how it should be determined whether alternate test conditions should 
apply.
    Issue 37: DOE also requests comment on whether DOE could further 
clarify the use of supplemental test instructions to address alternate 
testing requirements for specific CRE applications in order to provide 
more representative results.

D. Harmonization of Efficiency Standards and Testing With NSF 7-2019 
Food Safety

    NSF International (``NSF'') \10\/ANSI 7-2019, ``Commercial 
Refrigerators and Freezers,'' (``NSF 7-2019'') establishes minimum food 
protection and sanitation specifications for the materials, design, 
manufacture, and performance of commercial refrigerators and freezers 
and their related components. The current CRE test procedure allows 
Type I (designed to operate in 75 [deg]F ambient conditions) and Type 
II (designed to operate in 80 [deg]F ambient conditions) display 
refrigerators to be tested at NSF conditions, provided that these 
conditions result in higher energy consumption than the conditions 
specified by the DOE test procedure. Appendix B, section 2.3. To that 
end, the ambient temperature may be higher, but not lower than the DOE 
test condition; and the IAT may be lower, but not higher, than that 
measured at the DOE ambient test condition. Id. The test conditions, 
and possible different thermostat settings, under NSF 7-2019 may result 
in measured energy use that is more representative of average use in 
applications for which users prioritize food safety over energy 
efficiency. Permitting the use of the NSF 7-2019 test conditions may 
also reduce testing burden for manufacturers.
---------------------------------------------------------------------------

    \10\ Founded in 1944 as the National Sanitation Foundation, the 
organization changed its name to NSF International in 1990.
---------------------------------------------------------------------------

    Issue 38: To ensure further that the DOE test procedure is 
appropriately representative, and to potentially decrease manufacturer 
test burden, DOE requests comment on ways in which the DOE test 
procedure may be modified to better harmonize with NSF 7-2019, if 
appropriate. DOE specifically requests comment on potential test 
requirements related to food safety that could be specified to ensure 
that equipment is tested as it would operate in the field.

E. Dedicated Remote Condensing Units

    DOE is also aware of remote condensing CRE models where specific 
dedicated condensing units are intended for use with specific 
refrigerated cases. DOE has identified such equipment through 
manufacturer literature, installation instructions, and vendor 
information treating the entire system as a single model. In many of 
these situations, the remote condensing units are intended to be 
installed on or near the refrigerated case within the same conditioned 
space. In other situations, the remote condensing units are intended to 
be installed outdoors, but the refrigerated case is intended to be used 
specifically with the designated remote condensing unit.
    For this equipment, the combined refrigerated case and condensing 
unit refrigeration system would effectively operate as if it were a CRE 
with a self-contained condensing unit. Under the current DOE test 
procedure, remote CRE energy consumption is determined from the energy 
use of components in the refrigerated case plus a calculated compressor 
energy consumption based on the enthalpy change of refrigerant supplied 
to the case at specified conditions. The compressor energy use 
calculation is based on typical reciprocating compressor energy 
efficiency ratios (``EERs'') at a range of operating conditions. See 
Table 1 in AHRI 1200-2010. For CRE used with dedicated condensing 
units, the actual compressor used during normal operation is known 
(i.e., the compressor in the dedicated condensing unit). Accordingly, 
testing the whole system using the same approach as required for a 
self-contained CRE may produce energy use results that are more 
representative of how this equipment actually operates in the field. 
Additionally, testing such a system as a complete system rather than 
using the test procedures for remote condensing units may be less 
burdensome because

[[Page 31191]]

it would not require use of a test facility capable of maintaining the 
required liquid and suction line refrigerant conditions as currently 
required for testing remote CRE (i.e., the refrigerant conditions 
consistent with the ASHRAE 72-2005 requirements and at the conditions 
necessary to maintain the appropriate case temperature for testing).
    Issue 39: DOE seeks feedback on whether CRE with dedicated remote 
condensing units should be tested to evaluate the performance of the 
paired condensing unit and refrigerated case, rather than assuming a 
condensing unit EER as specified in the AHRI 1200 standards.
    Issue 40: DOE requests information on how to identify whether 
testing with a dedicated remote condensing unit is appropriate for a 
particular system (rather than the typical remote CRE testing under the 
existing approach). For example, such testing could be required only 
when manufacturers specify specific dedicated remote condensing units 
for use with a remote refrigerated case.
    Issue 41: DOE requests comment on appropriate test installations 
and conditions for testing CRE with paired remote condensing units. For 
example, both the refrigerated case and dedicated remote condensing 
unit could be installed within the same conditioned space, resulting in 
a test similar to that required for CRE with self-contained condensing 
units.
    Refrigerated cases do not always specify dedicated remote 
condensing units with which to be matched. Having performance 
information for both the refrigerated cases and separate dedicated 
remote condensing units would allow users to compare the performance of 
both parts of the system when matched.
    Issue 42: DOE also requests comment on whether, and if so how, 
users of CRE consider the energy performance of the system in instances 
in which a specific dedicated remote condensing unit is not identified 
for a refrigerated case. DOE requests comment on potential approaches 
to evaluate the energy performance of dedicated remote condensing units 
independent of their use with specific refrigerated cases.

F. Test Procedure Clarifications and Modifications

1. Defrost Cycles
    The test period requirements in ASHRAE 72-2005, incorporated by 
reference in the current CRE test procedure, and in ASHRAE 72-2018 
require starting the 24-hour test period with a defrost after steady-
state conditions are achieved.\11\ This method introduces a degree of 
variability in the measured energy consumption when the 24-hour period 
does not end at the end of a complete defrost cycle (the period from 
one defrost to the next) (i.e., the test period captures a portion of a 
defrost cycle rather than complete defrost cycles). Typically, if 
multiple complete defrost cycles occur within the 24-hour period, the 
impact of capturing partial defrost cycles is small. Similarly, if the 
defrost cycle duration is slightly greater than 24-hours, the impact of 
capturing a partial defrost cycle will be small. However, the impact 
may be more substantial if the defrost cycle duration is very long 
(i.e., multiple days between defrost) or if the defrost cycle is 
slightly less than 24 hours (i.e., the test period would capture two 
defrost occurrences but only one period of ``normal'' operation between 
defrosts). DOE also notes that ASHRAE 72-2005 does not have any 
provisions for addressing the possibility of CRE with variable defrost 
control schemes (i.e., defrosts that may be triggered based on 
conditions or other parameters rather than only a timer) or CRE with no 
automatic defrost (i.e., manual defrost).
---------------------------------------------------------------------------

    \11\ ASHRAE 72-2005 and ASHRAE 72-2018 define steady state as 
the condition where the average temperature of all test simulators 
changes less than 0.4 [deg]F from one 24-hour period or 
refrigeration cycle to the next.
---------------------------------------------------------------------------

    DOE has addressed similar issues in the test procedures for 
consumer refrigeration products. The test procedures for those products 
apply a two-part test period (one period for steady-state operation and 
one period to capture events related to the defrost cycle) to account 
for defrost energy consumption for products with long defrost cycle 
durations or with variable defrost control. The energy use calculations 
then weight the performance from each test period based on the known 
compressor runtime between defrosts or based on a calculated average 
time between defrosts in field operation that is based on the control 
parameters for variable defrosts. See appendices A and B to subpart B 
of 10 CFR part 430.
    Additionally, DOE has addressed testing of certain commercial units 
that do not have automatic defrost in a waiver granted to AHT Cooling 
Systems GmbH and AHT Cooling Systems USA Inc. (``AHT'') published on 
October 30, 2018. 83 FR 54581. For basic models subject to the waiver 
the test period begins after steady state conditions occur (instead of 
beginning with a defrost cycle) and that the door-opening period begin 
3 hours after the start of the test (instead of 3 hours after a defrost 
cycle). 83 FR 54581, 54583. DOE also granted AHT an interim waiver for 
testing certain models with defrost cycles longer than 24 hours. 82 FR 
24330 (May 26, 2017; ``May 2017 Interim Waiver''). The interim waiver 
requires that AHT test the specified models using a two-part test 
method similar to the method for consumer refrigerators, with the first 
part capturing normal compressor operation between defrosts, including 
an 8-hour period of door openings, and the second part capturing all 
operation associated with a defrost, including any pre-cooling or 
temperature recovery following the defrost. 82 FR 24330, 24332-24333.
    Issue 43: DOE requests comment on the impact of the potential 
defrost cycle variability and whether the test period should be revised 
to minimize the effects of defrost cycle duration for certain 
equipment. DOE additionally requests comment and supporting data on how 
incorporating a two-part test procedure may impact measured energy 
consumption, test burden, and repeatability and reproducibility. 
Additionally, DOE requests information on the availability of equipment 
with variable defrost control and the control schemes employed in those 
models, if any are available. DOE requests comment on whether the 
approach granted to AHT in the May 2017 Interim Waiver may better 
measure the representative energy use of CRE over complete defrost 
cycles compared to the current 24-hour test period.
    With regard to CRE models with multiple evaporators (and therefore, 
potentially multiple defrosts) connected to a single or multi-stage 
condensing unit, ASHRAE 72-2005 does not specify which evaporator 
should be used to determine the defrost cycle that initiates the test. 
Additionally, if the defrost cycles for multiple evaporators do not 
activate at the same time during the test, ASHRAE 72-2005 does not 
specify which defrost cycle should be used to determine the start of 
the 24-hour test period. ASHRAE 72-2005 also does not explicitly 
address the treatment of defrost cycles for multi-compartment CRE 
models (i.e., hybrid CRE) with different evaporator temperatures and 
defrost sequences.
    The DOE test procedure for consumer refrigeration products also 
addresses products with multiple evaporators and multiple defrosts. In 
that test procedure, the second (i.e., defrost) part of the test period 
is conducted separately for each defrost occurrence. Section 4.2.4 of 
10 CFR part 430 subpart B appendix A. Similar to the two-part test 
described

[[Page 31192]]

earlier in this section, the energy use calculations weight each 
individual defrost test period with the steady-state test period using 
the known compressor runtime between each defrost type or based on a 
calculated average time between defrosts. Section 5.2.1.5 of 10 CFR 
part 430 subpart B appendix A.
    Issue 44: DOE requests information regarding the types of defrost 
systems that exist in CRE available on the market and how manufacturers 
currently select test periods for models with multiple evaporators with 
non-synchronous defrost cycles. DOE requests comment on any potential 
modifications that could be made to the CRE test procedure in order to 
increase representativeness and provide additional detail for testing 
these units, including whether the two-part approach, as described 
earlier in this section, would be appropriate.
2. Total Display Area
    Section 3.2 of Appendix B provides instructions regarding the 
measurement of TDA. That section specifies that TDA is the sum of the 
projected area(s) of visible product, expressed in ft\2\ (i.e., 
portions through which product can be viewed from an angle normal, or 
perpendicular, to the transparent area).
    For certain CRE configurations, merchandise is not necessarily 
located at an angle directly normal, or perpendicular, to the 
transparent area despite the transparent area being intended for 
customer viewing. For example, for service over counter ice-cream 
freezers, the ice cream containers may be placed within the chest 
portion of the refrigerated case, with a glass display panel on the 
front and glass rear doors located above the merchandise storage area. 
If the glass display areas are nearly vertical, the ice cream 
containers may be positioned low enough in the case that they are not 
at a viewing angle perpendicular to the glass. However, during typical 
use, customers would stand close enough to the display glass that the 
ice cream would be visible from other angles not perpendicular to the 
glass. Accordingly, DOE is considering whether additional TDA 
instructions are necessary to capture the intended display function of 
this equipment.
    Issue 45: DOE seeks feedback on whether the TDA definition and test 
instructions should account for display areas in which the merchandise 
is not at a location normal to the display surface. If so, DOE requests 
information on how to define the revised display area.
    Issue 46: DOE also requests comment on other CRE applications or 
configurations for which the TDA, as currently defined, may not 
adequately represent the display functionality of the equipment.

G. Alternative Refrigerants

    DOE's current test procedure for remote condensing CRE requires the 
estimation of compressor EER from Table 1 of AHRI 1200-2010. The EER 
ratings in the table are based on performance of reciprocating 
compressors and were developed based on refrigerants that historically 
have been commonly used for CRE (i.e., R-404A).
    Certain remote CRE installations can use carbon dioxide 
(``CO2'') as the refrigerant; however, the existing remote 
CRE test procedure likely does not address the unique operation for 
these systems. For example, the current DOE test procedure requires an 
inlet refrigerant liquid temperature of 80 [deg]F with a saturated 
liquid pressure corresponding to a condensing temperature of 89.6 
[deg]F to 120.2 80 [deg]F. See ASHRAE 72-2005, sections 4.3.2 and 
4.3.3. CO2 has a critical point of 87.8 [deg]F and 1,070 
pounds per square inch (``psi''), above which it is a supercritical 
fluid. Accordingly, CO2 cannot be a liquid at the specified 
condensing temperature conditions (i.e., it would either be a gas or 
supercritical fluid, depending on pressure). Additionally, 
CO2 systems typically include multiple stages of compression 
and cooling, resulting in liquid supplied to the refrigerant cases at 
conditions not necessarily defined by the typical condensing unit 
conditions. DOE has recently granted a Decision and Order to address 
similar CO2 operating conditions for testing walk-in cooler 
and walk-in freezer unit coolers. 86 FR 14487 (March 19, 2021). That 
Decision and Order approach requires liquid inlet saturation 
temperature and liquid inlet subcooling of 38 [deg]F and 5 [deg]F, 
respectively. 86 FR 14487, 14489. The Decision and Order also maintains 
the existing compressor energy consumption determination based on an 
approach consistent with the CRE remote calculations using AHRI 1200-
2010 (the walk-in requirements instead refer to the walk-ins rating 
standard, AHRI 1250-2009, which includes the same EER table as AHRI 
1200-2020). Id.
    Issue 47: DOE requests information on the typical conditions for 
remote CRE intended for use with CO2 refrigerant. DOE 
requests comment and data on the applicability of the EER values in 
Table 1 of AHRI 1200-2010 to the typical compressor EERs for 
CO2 refrigerant systems.
    Issue 48: DOE also requests information and supporting data on 
whether the existing test procedure is appropriate for any other 
alternative refrigerants that may be used for remote CRE. DOE requests 
feedback on whether the operating conditions specified in ASHRAE 72-
2005 or the standardized EER values in Table 1 of AHRI 1200-2010 should 
be revised to account for operation with any other alternative 
refrigerants. DOE also requests usage data regarding the range of 
refrigerants in the remote CRE market.

H. Certification of Compartment Volume

    The current certification requirements specified in 10 CFR 429.42 
require manufacturers to certify compartment volumes for certain 
equipment classes of CRE. DOE's current test procedure incorporates by 
reference AHAM HRF-1-2008 to measure compartment volume. DOE 
acknowledges that manufacturers often use computer aided designs 
(``CAD'') to in designing their equipment. Using the CAD as the basis 
for determining compartment volumes may be particularly helpful when 
the geometric designs of the CRE make physical measurements in 
accordance with AHAM HRF-1-2008 difficult. DOE is considering whether 
it should allow CRE manufacturers to certify compartment volumes using 
CAD drawings. Currently, DOE's certification requirements in 10 CFR 
part 429 include provisions for certifying volume for basic models of 
consumer refrigeration products, commercial gas-fired and oil-fired 
instantaneous water heaters, and hot water supply boilers using CAD 
drawings. 10 CFR 429.72(c), (d), and (e).
    Issue 49: DOE requests comment on whether allowing manufacturers to 
certify compartment volumes for CRE basic models using CAD drawings 
would introduce any testing or certification issues. DOE also seeks 
information on the extent to which the use of CAD drawings may reduce 
manufacturer test burden.

I. Test Procedure Waivers

    A person may seek a waiver from the test procedure requirements for 
a particular basic model of a type of covered equipment when the basic 
model for which the petition for waiver is submitted contains one or 
more design characteristics that: (1) Prevent testing according to the 
prescribed test procedure, or (2) cause the prescribed test procedures 
to 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(a)(1).

[[Page 31193]]

    DOE has granted test procedures waivers for the current CRE test 
procedure. On September 12, 2018, DOE published a test procedure for 
ITW Food Equipment Group, LLC (``ITW'') for testing specified grocery 
and general merchandise system (i.e., refrigerated storage allowing for 
order storage and customer pickup) basic models which have unique 
operating characteristics including floating suction temperatures for 
individual compartments, different typical door-opening cycles, and a 
high-temperature ``ambient'' compartment. 83 FR 46148. As discussed in 
section II.E.1, DOE has granted AHT a test procedure waiver to allow 
for testing specified basic models that do not have defrost cycle 
capability when operated in freezer mode. 83 FR 54581. Additionally, 
also discussed in section II.E.1, DOE has granted AHT an interim test 
procedure waiver for testing certain models with defrost cycles longer 
than 24 hours. 82 FR 24330.
    The test procedure waivers for these CRE basic models have 
addressed provisions in the test procedures that would evaluate subject 
basic models in a manner so unrepresentative of their true energy 
consumption characteristics as to provide materially inaccurate 
comparative data.
    Issue 50: DOE requests feedback on whether the test procedure 
waiver approaches for the ITW and AHT petitions are generally 
appropriate for testing basic models with these features.

III. Submission of Contents

    DOE invites all interested parties to submit in writing by the date 
specified in the DATES heading, comments and information on matters 
addressed in this RFI and on other matters relevant to DOE's early 
assessment of whether an amended test procedure for CRE is warranted 
and if so, what such amendments should be.
    Submitting comments via https://www.regulations.gov. The https://www.regulations.gov web page requires 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. 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 https://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 
https://www.regulations.gov 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 https://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 https://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 https://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 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. 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 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. Submit these 
documents via email. 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).
    DOE considers public participation to be a very important part of 
the process for developing test procedures and energy conservation 
standards. DOE actively encourages the participation and interaction of 
the public during the comment period in each stage of this process. 
Interactions with and between members of the public provide a balanced 
discussion of the issues and assist DOE in the process. Anyone who 
wishes to be added to the DOE mailing list to receive future notices 
and information about this process should contact Appliance and 
Equipment Standards Program staff at (202) 287-1445 or via email at 
[email protected].

Signing Authority

    This document of the Department of Energy was signed on June 4, 
2021, by Kelly Speakes-Backman, Principal Deputy Assistant Secretary 
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

[[Page 31194]]

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 June 7, 2021.
Treena V. Garrett,
Federal Register Liaison Officer, U.S. Department of Energy.
[FR Doc. 2021-12160 Filed 6-10-21; 8:45 am]
BILLING CODE 6450-01-P