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The new minimum efficiency standards are based upon new metrics (SEER2/EER2/HSPF2) derived from a new test procedure (M1) rather than the historical metrics (SEER/EER/HSPF) from the old test procedure (M).
Testing procedures and requirements for developing efficiency ratings will now be more stringent with the new 2023 DOE regulations. The current M testing procedure is being replaced by the M1 testing procedure for 2023 compliance.
Why is COP important?
The COP of a heat pump is the ratio of: COP= energy out/energy in.
When the COP is >1, the result is a system providing more heating energy than energy consumed. As the COP2 increases, the higher the efficiency — resulting in lower utility costs.