StacksVerified U.S. regulatory reference

16 CFR Part 305, Appendix H

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov
Manufacturer's rated cooling capacity(btu's/hr)Range of SEER2's
LowHigh

Single Package Units

Central Air Conditioners (Cooling Only): All capacities13.419
Heat Pumps (Cooling Function): All capacities13.419

Split System Units

Central Air Conditioner models allowed only in northern states (listed in § 305.20(g)(13)) (Cooling Only): All capacities13.427
Central Air Conditioner models allowed in all states (Cooling Only):
All capacities13.827
Heat Pumps (Cooling Function): All capacities14.342
Small-duct, high-velocity Systems1215

Space-Constrained Products

Central Air Conditioners (Cooling Only): All capacities11.713.7
Heat Pumps (Cooling Function): All capacities11.913.8

[87 FR 57986, Dec. 2, 2022]