For most South Florida homeowners, the answer is simple: heat pump. Our ambient temperatures stay warm enough year-round that heat pumps are 3–5× more efficient than gas. But there are edge cases where gas still wins. Here's the honest breakdown.
Heat pump: the default choice
Heat pumps pull warmth from the outside air and transfer it into the pool. Efficiency is rated as COP (coefficient of performance). A typical South Florida heat pump runs at a COP of 5.0+ — meaning for every $1 of electricity, you get $5 of heat.
Works well when ambient temperatures are 50°F+ — which in Boca Raton and Delray Beach is essentially year-round.
- Upfront: $3,500–$6,500 installed
- Running cost: $40–$150/month during active heating
- Heat-up speed: Slow — about 1–2°F per hour
- Lifespan: 10–15 years
- Brands we install: AquaCal, Pentair UltraTemp, Hayward HeatPro
Gas heater: the fast-heat option
Gas heaters burn natural gas or propane to heat water. They're fast — 2–4× the heat-up rate of a heat pump — but 3–5× more expensive to run.
- Upfront: $3,000–$5,500 installed (plus gas line if not present)
- Running cost: $200–$600/month during active heating
- Heat-up speed: Fast — 5–8°F per hour
- Lifespan: 8–12 years (tougher on components due to heat)
- Brands we install: Raypak, Pentair MasterTemp, Hayward Universal
Solar: the long-game play
Solar thermal (not solar electric) uses roof-mounted panels to heat pool water. Cheapest to run — essentially free heat — but most expensive upfront and dependent on roof orientation.
- Upfront: $4,000–$9,000 installed
- Running cost: ~$0 (just the pump)
- Heat-up speed: Slow and weather-dependent
- Lifespan: 15–20 years
Which to pick
| If you… | Go with… |
|---|---|
| Use the pool regularly all year | Heat pump |
| Only heat the pool occasionally for guests | Gas |
| Want minimum operating cost, have south-facing roof | Solar + heat pump backup |
| Have an attached spa you want to heat fast | Gas (or hybrid system) |
| Rent out the pool (Airbnb, vacation rental) | Heat pump — predictable bills |
We install and service all three. See our heater service or request a quote.
Frequently Asked Questions
A heat pump — 3–5× more efficient than gas in South Florida's mild climate. Solar is cheapest to run but most expensive to install and depends on roof exposure.
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