On January 1, 2023, new equipment efficiency standards will take effect for air conditioners and heat pumps. This will be the first time since 2015 that the U.S. Department of Energy (DOE) has updated the standards for air conditioners and heat pumps.

In addition to the new requirements for the manufacture and installation of new equipment, the metrics used to designate the efficiency of these systems will also be changing. This change reflects updates to the underlying testing protocols. The current SEER and EER designations will be replaced with SEER2 and EER2. The current HSPF will be replaced with HSPF2.

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