Quick answer
The heating-efficiency rating for heat pumps — higher is better.
HSPF2 rates how efficiently a heat pump heats over a season. Like SEER2, the '2' version arrived in 2023 with an updated test procedure. A higher HSPF2 means the heat pump delivers more heating per unit of electricity, lowering winter operating cost.
Why HSPF2 matters
Efficiency terms affect operating cost, rebate eligibility, and how confidently you can compare one quote against another. A higher rating can lower utility bills, but only if the system is sized, matched, and installed correctly.
When you'll see this term
You will usually see this term on equipment proposals, AHRI matches, rebate paperwork, energy labels, and replacement comparisons.
Questions to ask your technician
- How does this rating change my expected operating cost?
- Does this equipment qualify for any current utility or manufacturer rebate?
- Is the indoor and outdoor equipment matched so the rating is valid?
Go deeper
AFUE, SEER2 & HSPF: efficiency ratings explained
Related terms
- SEER2 (Seasonal Energy Efficiency Ratio 2)
- The cooling-efficiency rating for ACs and heat pumps — higher is better.
- Heat Pump
- A system that heats and cools by moving heat instead of burning fuel.
- AFUE (Annual Fuel Utilization Efficiency)
- How efficiently a furnace turns fuel into heat, as a percentage.