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Federal Register / Vol. 86, No. 127 / Wednesday, July 7, 2021 / Proposed Rules
B
Metric
Commercial Packaged Boilers

Combustion Efficiency
Thermal Efficiency
Thermal Efficiency
Standby Loss
R-Value
Seasonal Energy-Efficiency Ratio

5% 0.05
5% 0.05
5% 0.05
10% 0.1
10% 0.1
5% 0.05

Heating Season Performance Factor
Energy Efficiency Ratio
Energy Efficiency Ratio

5% 0.05
10% 0.1
5% 0.05

Coefficient of Performance
Integrated Energy Efficiency Ratio
Energy Efficiency Ratio
Coefficient of Performance
Integrated Energy Efficiency Ratio
Energy Efficiency Ratio
Coefficient of Performance
Integrated Energy Efficiency Ratio
Energy Efficiency Ratio
Coefficient of Performance
Integrated Energy Efficiency Ratio
Energy Efficiency Ratio
Coefficient of Performance
Energy Efficiency Ratio
Coefficient of Performance
Energy Efficiency Ratio
Coefficient of Performance
Integrated Energy Efficiency Ratio
Net Sensible Coefficient of Performance Integrated Seasonal Coefficient of Performance 2.
Integrated Seasonal Moisture Removal Efficiency 2.
Thermal Efficiency
Daily Energy Consumption

5%
10% 0.1
5% 0.05
5% 0.05
10% 0.1
5% 0.05
5% 0.05
10% 0.1
5% 0.05
5% 0.05
10% 0.1
5% 0.05
5% 0.05
5% 0.05
5% 0.05
5% 0.05
5% 0.05
10% 0.1
5% 0.05
10% 0.1

Commercial Water Heaters or Hot Water Supply Boilers
Unfired Storage Tanks
Air-Cooled, Split and Packaged ACs and HPs less than 65,000 Btu/h Cooling Capacity 3-Phase.
Air-Cooled, Split and Packaged ACs and HPs greater than or equal to 65,000 Btu/h Cooling Capacity and Less than 760,000 Btu/h Cooling Capacity.
Water-Cooled, Split and Packaged ACs and HPs, All Cooling Capacities
Evaporatively-Cooled, Split and Packaged ACs and HPs, All Capacities
Water-Source HPs, All Capacities
Single Package Vertical ACs and HPs
Packaged Terminal ACs and HPs
Variable Refrigerant Flow ACs and HPs
Computer Room Air Conditioners
Dehumidifying Direct Expansion-Dedicated Outdoor Air Systems

Commercial Warm-Air Furnaces
Commercial Refrigeration Equipment

PART 431ENERGY EFFICIENCY
PROGRAM FOR CERTAIN
COMMERCIAL AND INDUSTRIAL
EQUIPMENT
4. The authority citation for part 431
continues to read as follows:

Authority: 42 U.S.C. 62916317; 28 U.S.C.
2461 note.

5. Amend 431.2 by revising the definition of Commercial HVAC & WH
product to read as follows:

431.2

Definitions.

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Applicable tolerance
Equipment

Commercial HVAC & WH product means any small, large, or very large commercial package air-conditioning and heating equipment as defined in 431.92, packaged terminal air conditioner as defined in 431.92, packaged terminal heat pump as defined in 431.92, single package vertical air conditioner as defined in 431.92, single package vertical heat pump as defined in 431.92, computer room air conditioner as defined in
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431.92, variable refrigerant flow multi-split air conditioner as defined in 431.92, variable refrigerant flow multi-split heat pump as defined in 431.92, direct expansion-dedicated outdoor air system as defined in 431.92, commercial packaged boiler as defined in 431.82, hot water supply boiler as defined in 431.102, commercial warm air furnace as defined in 431.72, instantaneous water heater as defined in 431.102, storage water heater as defined in 431.102, or unfired hot water storage tank as defined in 431.102.

6. Amend 431.92 by:
a. Revising the definition of Basic model; and b. Adding, in alphabetical order, the definitions for Dehumidifying direct expansion-dedicated outdoor air system, or DDXDOAS, Direct expansiondedicated outdoor air system, or DX
DOAS, Integrated seasonal coefficient of performance 2, or ISCOP2, Integrated seasonal moisture removal efficiency 2, or ISMRE2, and
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10% 0.1
5% 0.05
5% 0.05

Ventilation energy recovery system, or VERS.
The revision and additions read as follows:
431.92 Definitions concerning commercial air conditioners and heat pumps.

Basic model includes:
1 Computer room air conditioners means all units manufactured by one manufacturer within a single equipment class, having the same primary energy source e.g., electric or gas, and which have the same or comparably performing compressors, heat exchangers, and air moving systems that have a common nominal cooling capacity.
2 Dehumidifying direct expansiondedicated outdoor air system means all units manufactured by one manufacturer, having the same primary energy source e.g., electric or gas, within a single equipment class; with the same or comparably performing compressors, heat exchangers, ventilation energy recovery systems if
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