DOE Regulations

Southwest Regional Efficiency Standards

2023 Southwest Region Highlight

Split air conditioners installed in the southeast region must achieve a 15.0 SEER rating. Up from 14.0 SEER.



Below are the Southwest Region’s minimum efficiency standards for Split Air Conditioners, Split Heat Pumps and Packaged Units effective January 1, 2023.

Compliance is based on date of installation. Supersedes federal minimum for split and package air conditioners. Includes the following states: Arizona, California, Nevada and New Mexico.

Product Type Tonnage Southwest
Residential Air Conditioners < 3.5 Tons 14.3 SEER2 (15 SEER)
≥ 3.5 Tons 13.8 SEER2 (14.5 SEER)
Heat Pumps   14.3 SEER2 (15 SEER)
Package AC   13.4 SEER2 (14 SEER)
Package Heat Pump   13.4 SEER2 (14 SEER)

Effective Dates: 1/1/2023 and after

Sell-through deadlines vary by product line and region.

Product Type Region Governing Date for Change
Split A/C Southwest Date of Installation
Split HP All Date of Manufacture
Package AC Southwest Date of Installation
Package HP All Date of Manufacture