What is HSPF2?
HSPF2 (Heating Seasonal Performance Factor 2) measures how efficiently a heat pump heats your home across a full heating season. It's the heating counterpart to SEER2. A higher HSPF2 means the system turns more of the electricity it draws into delivered heat, which is what keeps a heat pump cheap to run even in winter.
Why HSPF2 matters more in cold climates
The colder your winters, the more your heating efficiency drives your annual energy cost. A strong HSPF2 paired with genuine cold-climate performance is what lets a heat pump stay affordable to run when the temperature drops.
SEER2 vs HSPF2 at a glance
| SEER2 | HSPF2 | |
|---|---|---|
| Measures | Cooling efficiency | Heating efficiency |
| Season rated | Cooling season | Heating season |
| Higher number means | Less electricity to cool | Less electricity to heat |
| Matters most for | Cooling-heavy, hotter climates | Heating-heavy, colder climates |
A heat pump carries both numbers because it does both jobs.
How Jetson Air compares
Jetson benchmarks Jetson Air against the equipment homeowners cross-shop. Stephen Lake describes where it lands:
"Performance-wise we're, I think, on par or exceeding the Mitsubishi Hyper Heat on all core metrics like HSPF2 and SEER ratings." (listen, 40:52)
Want to see what an efficient system would cost up front? You can see your price and the rebates you qualify for from your address. For the running-cost side of the question, see is electric home heating more expensive.
Common questions
HSPF2 vs SEER2? HSPF2 rates heating and SEER2 rates cooling. A heat pump has both because it does both jobs.
Does a high HSPF2 mean I won't need backup heat? It helps, but whether you need backup heat depends more on correct sizing and the system's rated low-temperature range than on the HSPF2 number by itself.