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Federal Register / Vol. 86, No. 132 / Wednesday, July 14, 2021 / Rules and Regulations
publications did ASHRAE amend minimum EER levels for small, large, and very large WCUACs or ECUACs;
therefore, DOE was not prompted to examine amended standards for this equipment under 42 U.S.C.
6313a6A. As a result, the current federal standards for ECUACs and WCUACs are those set forth in the May 2012 final rule and codified in Table 1
of 10 CFR 431.97.
On July 29, 2019, DOE published a request for information RFI to solicit information and data from interested
parties to consider amendments to the DOE energy conservation standards for ECUACs and WCUACs. 84 FR 36480
July 2019 ECS RFI.
On September 15, 2020 DOE
published a notice of proposed determination NOPD with the tentative determination that energy conservation standards for ECUACs and WCUACs do not need to be amended September 2020 NOPD. 85 FR
57149. The comment period for this notice closed on November 30, 2020. On October 1, 2020, DOE held a public
webinar 4 to discuss the analysis and results from the September 2020 NOPD.
DOE received several comments from interested parties in response to the publication of the September 2020
NOPD. Table II.2 lists the commenters, their abbreviated names used throughout this final determination, and organization type. Discussion of the relevant comments provided by these organizations and DOEs responses are provided in the appropriate sections of this document.

TABLE II.2INTERESTED PARTIES THAT PROVIDED WRITTEN AND ORAL COMMENTS REGARDING THE SEPTEMBER 2020
NOPD
Name
Abbreviation
United CoolAir
Institute for Policy Integrity at NYU School of Law
California Investor Owned Utilities Pacific Gas and Electric Company, San Diego Gas and Electric, and California Edison.
Trane Technologies
Daikin

UCA
IPI
CA IOUs

Manufacturer.
Academic Institution.
Utilities.

Trane
Daikin

Manufacturer.
Manufacturer.

A parenthetical reference at the end of a comment, quotation or paraphrase provides the location of the item in the public record.5
III. Discussion and Rationale DOE developed the conclusions in this notice after considering oral and written comments, data, and information from interested parties that represent a variety of interests. This section addresses the analyses DOE
performed for this final determination regarding ECUACs and WCUACs.
Separate subsections address each component of DOEs analyses and responses to relevant comments received regarding the September 2020
NOPD.

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A. General Comments In response to the September 2020
NOPD, DOE received several general comments. CA IOUs supported DOEs initial determination to maintain the current standards, stating that the market for this equipment is extremely small. CA IOUs, No. 13 at p. 2 UCA
stated that if DOE is correct in its assumed decline of shipments, then there is no need for an increase in efficiency at this time. UCA, No. 11 at p. 1
As discussed below, DOE has determined that it lacks clear and convincing evidence that amended standards for ECUACs and WCUACs 4 The public webinar presentation and transcript can both be found at http www.regulations.gov under docket number EERE2017BTSTD0032.

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Commenter type
would result in significant additional energy savings and be technologically feasible and economically justified.
DOE received comments from UCA
and CA IOUs regarding the test procedures for ECUACs and WCUACs.
UCA, No. 11 at p. 1; CA IOUs, No. 13
at p. 2 UCA stated that several third party test facilities are limited in the physical size and capacity limits they can test; therefore, they stated that certain UCA models cannot be tested at these facilities. UCA, No. 11 at p. 1 CA
IOUs encouraged DOE to expedite work on an updated test standard for all CUACs. CA IOUs, No. 13 at p. 2
Specifically, CA IOUs commented that the Appliance Standards and Rulemaking Federal Advisory Committee ASRAC, Commercial Package Air Conditioners and Commercial Warm Air Furnaces Working Group unanimously agreed that a new test procedure for CUACs, which should include a more representative evaluation of indoor fan power consumption, should be completed no later than January 1, 2019.
Id.
The September 2020 NOPD sought comment on DOEs determination of whether the energy conservation standards for ECUACs and WCUACs should be amended. Consideration of amendments to the test procedures are not within the scope of this determination. DOE will consider
comments received regarding ECUAC
and WCUAC test procedures in the ongoing evaluation of the CUAC test procedure. See 82 FR 34427 July 25, 2017.

5 The parenthetical reference provides a reference for information located in the docket for this determination. Docket No. EERE2017BTSTD
0032, which is maintained at https

www.regulations.gov/docket?D=EERE-2017-BTSTD-0032. The references are arranged as follows:
Commenter name, comment docket ID number, page of that document.

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B. Energy Efficiency Metric The current energy efficiency descriptor for the ECUAC and WCUAC
Federal standards is EER. 10 CFR
431.97. ASHRAE 90.1 has specified both EER and integrated energy efficiency ratio IEER minimum efficiency levels since 2010.
The EER metric represents the efficiency of the equipment operating at full load. The IEER metric factors in the efficiency of operating at part loads of 75 percent, 50 percent, and 25 percent of capacity as well as the efficiency at full load by weighting the fulland partload efficiencies based on the average amount of time operating at each load point. Additionally, IEER incorporates reduced condenser temperatures i.e., reduced entering water temperature for WCUACs and reduced outdoor air drybulb and wet-bulb temperatures for ECUACs to reflect the representative ambient conditions for part-load operation in the field. Table III.1 shows the IEER test conditions for ECUACs and WCUACs specified in AHRI
Standard 340/3602019, Performance Rating of Commercial and Industrial Unitary Air-conditioning and Heat
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