Best pool heat pumps
The best pool heat pump is sized to your pool and climate. Here is how to size it, the specs that matter, and how to keep running costs down.
Size it before you shop
Pool heat pump performance is all about matching BTU output to your pool's heat loss. Use our pool heat pump sizing calculator — roughly surface area times temperature rise times 12 (uncovered). Undersize it and the pool never reaches temperature; oversize and you overpay.
What to look for
- COP (efficiency) — higher means lower running cost; quality units reach 5–6.
- Titanium heat exchanger — resists corrosion from pool chemicals and salt systems.
- Quiet operation and a wide ambient-temperature range for shoulder seasons.
- BTU output matched to your sizing result.
Cutting running cost
Use a cover, shelter the pool from wind, and heat only when the pool is in use. A higher-COP unit pays back through lower electricity bills over the season.
Frequently asked questions
What size pool heat pump do I need?
Roughly pool surface area times temperature rise times 12 (uncovered) BTU/hr. Use our pool sizing calculator for your number.
What makes a good pool heat pump?
A high COP for efficiency, a titanium heat exchanger for corrosion resistance, and BTU output matched to your pool size.
Is a pool heat pump cheaper to run than gas?
Usually yes — pool heat pumps are very efficient (COP 4–6), while gas heaters cost much more per hour to run.
Related
Sources & further reading
Educational guide, reviewed against US DOE & ENERGY STAR guidance and updated June 2026. Estimates only — not a substitute for a professional assessment or Manual J load calculation.