Glossary
Efficiency ratings
HSPF2
Heating Seasonal Performance Factor 2, the seasonal heating-efficiency rating for heat pumps under the updated 2023 test procedure. Higher HSPF2 means more heat delivered per unit of electricity across the heating season.
Why it matters for your home
If you're considering a heat pump in Missouri, HSPF2 predicts your winter electric bills the way SEER2 predicts summer ones. Our heating season is long, so a higher HSPF2 model earns its premium back in heating mode, and rebate programs often set minimum HSPF2 thresholds for qualifying equipment.
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