HSPF2

Metrics and Efficiency Ratings - Heat Pumps pillar

Also known as: HSPF 2, Heating Seasonal Performance Factor 2

Heating Seasonal Performance Factor 2. The 2023+ heating-mode efficiency rating for heat pumps in BTU per watt-hour, replacing HSPF.

HSPF2 measures heat pump heating efficiency over a typical heating season, expressed as BTU of heat delivered per watt-hour of electricity consumed. The 2023 test methodology produces HSPF2 values about 15% lower than legacy HSPF for the same equipment. Cold-climate heat pumps suitable for Ontario typically rate HSPF2 of 8.5 or higher. ENERGY STAR Cold Climate certification requires HSPF2 of 8.1 or higher in Region V (cold).

See the full Ontario HVAC and home energy glossary or browse the Heat Pumps pillar.