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Federal Register / Vol. 86, No. 132 / Wednesday, July 14, 2021 / Rules and Regulations TABLE III.4CURRENT MARKET EFFICIENCY DISTRIBUTIONS FOR WCUACS AND ECUACContinued EER
Number of unique models
Cooling capacity range Btu/h
Average cooling capacity Btu/h
Minimum
Average
Maximum
Current Federal EER
Standard Level

Evaporatively-Cooled Air Conditioners <65,000
65,000 and <135,000
135,000 and <240,000
240,000 and <760,000

8
0 0
4

37,950
N/A
N/A
442,750

13.2
N/A
N/A
11.8

15.0
N/A
N/A
12.7

16.0
N/A
N/A
13.4

12.1
N/A
N/A
11.7

For all capacity ranges except very large evaporatively-cooled air conditioners, the Federal EER standard listed is for no heat or electric heat class. For the very large evaporatively-cooled air conditioner class, the Federal EER standard listed is the all other types of heating class.
As mentioned later in this section, this maximum EER value was determined to be an outlier, and thus the next highest efficiency level i.e., an EER of 15 was used as the max-tech value.

DOE used these efficiency distributions and the previously described shipment projections to develop estimated energy savings and percent of no-new-standards energy consumption for 30 years of shipments 20202049.
Energy savings were estimated based on the forecasted shipments labeled 2019 trend, 2019 constant, and 2019
regression. For the savings estimates labeled 2019 regression, as noted in section III.C.1 of this final determination, a regression projection was only developed for the very large equipment class.
As mentioned in section II.B.2 of this final determination, the cumulative site energy savings are calculated using the max-tech level, which is the highest value of efficiency in DOEs CCMS
Database within each capacity range of ECUACs and WCUACs i.e., <65,000
Btu/h, 65,000135,000 Btu/h, 135,000
240,000 Btu/h, and 240,000760,000
Btu/h. However, for very large WCUACs, consideration of the highest efficiency value in DOEs CCMS

database may not be appropriate for evaluating potential amendments to the energy conservation standards. As explained in the September 2020 NOPD, DOE considered the single model rated at 16.1 to be an outlier and subsequently calculated the energy savings from potential amended standards for very large WCUACs using the next highest level that was achievable across the range of capacities i.e., an EER of 15.
85 FR 57149, 57158. DOE did not receive any comments on the use of the max-tech efficiency levels in calculating the estimated savings in the NOPD, and the same max-tech levels were used for the final determination.
For the September 2020 NOPD, DOE
did not incorporate changing trends in shipments by efficiency over time in the no-new-standards case. No comments were received on efficiency trends and DOE retained this assumption in the energy savings estimates, which vary by shipment scenario and equipment class, presented in Table III.5 of this final determination.

Selecting the minimum and maximum estimated savings scenario for each equipment class resulted in a range of total estimated site energy savings for the WCUAC classes of between 0.0030 quads 8.5 percent of estimated site energy use and 0.0046
quads 8.6 percent of estimated site energy use, and for the ECUAC classes of 0.00006 quads 6.2 percent of estimated site energy use and 0.00011
quads 6.0 percent of estimated site energy use during the analysis period.
For both equipment categories, the resulting estimated savings ranged between 0.0031 quads 8.5 percent of estimated site energy consumption and 0.0047 quads 8.6 percent of estimated site energy consumption during the analysis period depending on the combination of shipment projections analyzed. Because DOE received no comments resulting in changes to inputs or the analysis, the estimate savings presented in Table III.5 are the same as those presented in the September 2020
NOPD.

TABLE III.5ESTIMATED NATIONAL SITE ENERGY SAVINGS AND PERCENT ENERGY REDUCTIONS FOR WCUACS AND
ECUACS AT THE MAX-TECH LEVEL
Cumulative site national energy savings quads

Cooling capacity range Btu/h
Trend
I

Constant
I

Regression
Reduction in national site energy consumption percent
WCUACs
lotter on DSK11XQN23PROD with RULES1

<65,000
65,000 and <135,000
135,000 and <240,000
240,000 and <760,000

0.00000
0.00005
0.00011
0.00287

0.00000
0.00019
0.00025
0.00395

0.00413

0.0
13.3
10.1
8.4

0.00001
N/A
N/A

0.00004
N/A
N/A

N/A
N/A

5.3
N/A
N/A

ECUACs <65,000
65,000 and <135,000
135,000 and <240,000

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