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Federal Register / Vol. 86, No. 132 / Wednesday, July 14, 2021 / Rules and Regulations DOE is publishing this final determination pursuant to the six-year review required by EPCA, having determined that amended standards for ECUACs and WCUACs would not result in significant additional conservation of
energy, be technologically feasible, and be economically justified.
B. Background 1. Current Standards The current energy conservation standards for ECUACs and WCUACs are
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located in Table 1 of 10 CFR 431.97.
These standards and their compliance dates are presented in Table II.1 of this document. The current efficiency metric used for ECUACs and WCUACs is the energy efficiency ratio EER.

TABLE II.1FEDERAL ENERGY CONSERVATION STANDARDS FOR WATER-COOLED AND EVAPORATIVELY-COOLED
COMMERCIAL PACKAGE AIR-CONDITIONING AND HEATING EQUIPMENT
Equipment type
Cooling capacity Btu/h
Heating type
Small Water-Cooled
Small Water-Cooled

<65,000
65,000 and <135,000

Large Water-Cooled

135,000 and <240,000

Very Large Water-Cooled

240,000 and <760,000

Small Evaporatively-Cooled
Small Evaporatively-Cooled

<65,000
65,000 and <135,000

Large Evaporatively-Cooled

135,000 and <240,000

Very Large Evaporatively-Cooled
240,000 and <760,000

All
No Heating or Electric Resistance Heating.
All Other Types of Heating
No Heating or Electric Resistance Heating.
All Other Types of Heating
No Heating or Electric Resistance Heating.
All Other Types of Heating
All
No Heating or Electric Resistance Heating.
All Other Types of Heating
No Heating or Electric Resistance Heating.
All Other Types of Heating
No Heating or Electric Resistance Heating.
All Other Types of Heating

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2. Rulemaking History On October 29, 2010, ASHRAE
updated ASHRAE Standard 90.1 with respect to small, large, and very large commercial package air conditioning and heating equipment i.e., ASHRAE
90.12010. With regard to ECUACs and WCUACs, ASHRAE 90.12010 updated efficiency levels for certain small i.e., cooling capacity greater than or equal to 65,000 Btu/h and less than 135,000 Btu/
h, large, and very large ECUACs and WCUACs. ASHRAE 90.12010 also updated its referenced test procedures for this equipment. ASHRAE 90.12010
did not amend the efficiency levels for certain small i.e., cooling capacity less than 65,000 Btu/h WCUACs and ECUACs but did amend the test procedure for this equipment.
In a final rule published May 16, 2012, DOE amended the standards for ECUACs and WCUACs by adopting EER
levels for this equipment established in ASHRAE 90.12010. 77 FR 28928 May 2012 final rule. For certain small i.e., cooling capacity greater than or equal to 65,000 Btu/h and less than 135,000 Btu/
h, large, and very large WCUACs and ECUACs, DOE estimated the energy savings potential of standards at the
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max-tech 3 efficiency levels over those efficiency levels in ASHRAE 90.12010
i.e., energy savings estimates for maxtech levels do not include the energy savings from increasing the Federal standard at the time to the level found in ASHRAE 90.12010. 76 FR 25622, 2564425646 May 5, 2011. Based on an analysis of two different shipment scenarios shipments based on historical trends and constant shipments fixed to 2009 shipment levels, DOE estimated that efficiency standards at the max-tech level would result in additional energy savings of between 0.0061 to 0.0102
quads primary energy savings for the six classes of small, large, and very large WCUACs analyzed 76 FR 25622, 2564425645, representing approximately 4.9 percent to 5.5 percent of estimated WCUAC energy use during the analysis period. DOE estimated that efficiency standards at the max-tech level would result in additional energy savings of between 0.0013 to 0.0021
quads primary energy for the two classes of very large ECUACs analyzed 76 FR 25622, 25646, representing approximately 3.7 percent to 3.9 percent of estimated ECUAC energy use during the analysis period. DOE did not 3 The max-tech level represented the highest efficiency level of equipment available on the market at the time of the analysis.

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Minimum EER

Compliance date
12.1
12.1

October 29, 2003.
June 1, 2013.

11.9
12.5

June 1, 2013.
June 1, 2014.

12.3
12.4

June 1, 2014.
June 1, 2014.

12.2
12.1
12.1

June 1, 2014.
October 29, 2003.
June 1, 2013.

11.9
12.0

June 1, 2013.
June 1, 2014.

11.8
11.9

June 1, 2014.
June 1, 2014.

11.7

June 1, 2014.

examine certain small WCUACs and ECUACs i.e., equipment less than 65,000 Btu/h cooling capacity because the levels in ASHRAE 90.12010 for such equipment were not amended. 76
FR 25622, 25631. Additionally, DOE did not assess potential energy savings for ECUACs with cooling capacity greater than or equal to 65,000 Btu/h but less than 240,000 Btu/h because it did not find any equipment in this capacity range in the U.S. market. Id.
Based on its analysis and the review of the market, DOE determined that it did not have clear and convincing evidence that significant additional conservation of energy would result from adoption of more stringent standard levels than those in ASHRAE
90.12010 for ECUACs and WCUACs.
77 FR 28928, 28979. DOE did not conduct an economic analysis of standards more stringent than the ASHRAE 90.12010 levels for ECUACs and WCUACs because of the conclusion that more stringent standards would result in minimal energy savings. Id.
Since ASHRAE 90.12010 was published, ASHRAE 90.1 has undergone three revisions. On October 9, 2013, ASHRAE published ASHRAE 90.1
2013; on October 26, 2016, ASHRAE
published ASHRAE 90.12016; and on October 24, 2019, ASHRAE published ASHRAE 90.12019. In none of these
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