Efficiency ratings
HSPF
Heating Seasonal Performance Factor — how efficient a heat pump is at heating over a typical winter.
HSPF is the heating-mode equivalent of SEER. It expresses BTU of heat output per watt of electrical input, averaged over a heating season. Higher = better. Minimum legal HSPF in Canada is 8.2; cold-climate heat pumps run 10–13 HSPF.
A new metric, HSPF2, replaced HSPF in 2023. HSPF2 numbers are 15–20% lower for the same equipment because of stricter test conditions.
For a heat pump in Mississauga, every 1.0 increase in HSPF saves ~$60/year on heating electricity. The premium for a cold-climate model (HSPF2 9.5+) over a basic model (8.0) typically pays back in 4–6 years AND keeps you warm down to -25°C.
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Mississauga, ON · Greater Toronto Area and up to 2 hours out — London, Kitchener, Barrie, Kingston, Niagara.