Heating Seasonal Performance Factor (HSPF) – Defined
Find this page at:
go.ncsu.edu/readext?266737
go.ncsu.edu/readext?266737
A representation of the total heating output of a central air-conditioning heat pump in BTUs during its normal usage period for heating, divided by the total electrical energy input in watt-hours during the same period. Practical info: A heat pump with a high HSPF is more efficient than one with a low HSPF.