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Heating & Cooling

HSPF (Heating Seasonal Performance Factor)

A measure of heat pump heating efficiency over a typical heating season. Higher HSPF means better efficiency. Minimum federal standards are around 8.8; efficient units reach 13+.

Example

An HSPF 10 heat pump delivers 10 BTU of heat per watt-hour of electricity over the season.

Related Terms

SEER RatingCOPHeat Pump