Pool Heating Options Explained: Heat Pumps vs Gas vs Solar
If you want to use your pool beyond peak summer, the right heater matters. Here’s how to choose the best option for South Carolina climates.
Why Pool Heating Matters in South Carolina
South Carolina’s climate allows swimming well beyond summer—if your pool is heated. A heater can extend your swim season from roughly May–September to March–October, and in some cases even longer.
The Three Main Pool Heating Options
1. Heat Pumps
Heat pumps use electricity to pull heat from the air and transfer it to the water. They don’t create heat—they move it.
- Most energy-efficient option for warm climates
- Best for maintaining a steady water temperature
- Higher upfront cost, lower long-term operating cost
According to the U.S. Department of Energy, heat pumps can be 50–70% more energy-efficient than traditional electric resistance heating.
2. Gas Heaters (Natural Gas or Propane)
Gas heaters burn fuel to heat water quickly. They’re powerful—but less efficient.
- Fastest way to raise water temperature
- Great for spas or infrequent use
- Higher operating cost
Gas heaters are ideal if you only heat your pool occasionally or want rapid heating for events.
3. Solar Pool Heating
Solar systems circulate pool water through rooftop or ground-mounted solar collectors.
- Lowest operating cost
- Environmentally friendly
- Dependent on sun exposure and roof space
Solar works best as a supplement, not a standalone solution, especially in spring and fall.
Side-by-Side Comparison
| Feature | Heat Pump | Gas Heater | Solar |
|---|---|---|---|
| Upfront Cost | Medium–High | Medium | Medium |
| Operating Cost | Low | High | Very Low |
| Heating Speed | Moderate | Fast | Slow |
| Best Use Case | Regular use | Occasional heating | Seasonal boost |
What Most Homeowners Choose (and Why)
For most SimplePool clients in the Upstate, a heat pump paired with a solar cover delivers the best value:
- Lower monthly energy cost
- Consistent water temperature
- Quiet operation
- Long equipment lifespan
Heating Costs to Expect
Annual heating costs vary widely based on usage, temperature target, and equipment choice:
- Heat Pump: ~$600–$1,200/year
- Gas Heater: ~$1,500–$3,000+/year
- Solar: Minimal operating cost
(Source ranges compiled from DOE and national pool maintenance data.)
Design Tip: Heating Should Be Planned Early
Electrical service, gas line sizing, pad layout, and automation integration all affect heater choice. Adding heating during design is far more cost-effective than retrofitting later.