Gas Pool Heater Cost Calculator
Need quick, reliable heat for your pool—especially when temperatures drop? A gas pool heater might be the right solution. Whether you choose natural gas or propane, our Gas Pool Heater Cost Calculator helps estimate the installation and monthly fuel costs based on your pool size, climate, and usage preferences.
How Gas Pool Heaters Work
Water is pumped from the pool through a filter and then into a combustion chamber inside the gas heater. As natural gas or propane burns, the heat is transferred to the water, which then flows back into the pool. The result? A consistent and controllable temperature boost.
Why Choose a Gas Pool Heater?
Gas heaters are known for their powerful and fast heating capabilities. Here’s why many pool owners prefer them:
- Rapid heat-up time (1–3°F per hour)
- Ideal for occasional use or vacation homes
- Compact and easy to retrofit into existing systems
- Works in all climates
Gas heaters are one of the most effective and fast-acting options for indoor pool environments, particularly in cold climates. Planning to build an indoor pool? Estimate full installation and enclosure costs using our indoor pool cost calculator.
Installation Costs for Gas Pool Heaters
- Heater unit: $1,500 – $3,500 (based on BTU size)
- Gas line extension: $500 – $2,000 (if needed)
- Electrical hookup and controller: $300 – $800
- Permit and inspection: $100 – $500
- Total installed cost: $2,500 – $6,500+
Ongoing Operating Costs
Monthly fuel usage depends heavily on pool size, temperature goals, and local fuel prices.
Estimated Monthly Cost (Heating 78–82°F):
- Small pool (10×20 ft): $100 – $200
- Medium pool (15×30 ft): $200 – $350
- Large pool (20×40 ft): $300 – $500+
Prices may fluctuate with propane/natural gas rates.
What You'll Enter Into the Calculator
To get an accurate gas pool heating estimate, input:
- Pool dimensions or gallons
- Climate zone (mild, moderate, cold)
- Heating season duration (months/year)
- Preferred water temperature
- Gas type (natural or propane)
Example Cost Estimate: Natural Gas Heater in Texas
Specs:
- 15×30 ft pool (~13,500 gallons)
- Desired temp: 82°F
- Season: 6 months/year
Estimate:
- Unit cost: $2,000
- Installation & permits: $1,500
- Monthly gas cost: ~$220
- Annual heating cost: ~$1,320
Total Year 1 Cost: ~$4,820
Pros and Cons of Gas Pool Heaters
Pros:
- Fastest heating option
- Works in any temperature
- Great for spot heating or quick warmups
Cons:
- Highest fuel cost
- Less energy-efficient than heat pumps or solar
- Requires gas line or fuel delivery
Energy Efficiency Tips
- Use a solar cover to reduce heat loss
- Lower temp when not in use
- Only run heater when needed
- Insulate exposed pipes
Do You Need a Permit?
In most locations, yes. Installation must comply with:
- Local building codes
- Gas and electrical safety standards
- HVAC clearance regulations
How Accurate is This Calculator?
We use:
- 2025 regional gas prices
- Manufacturer-reported efficiency ratings (80–85%)
- Pool surface area to BTU ratio estimates
Estimates are meant for planning—not guaranteed bids.
Final Thoughts
Gas pool heaters are unbeatable when it comes to quick warmth, but that speed comes at a higher monthly cost. Use our Gas Pool Heater Cost Calculator to determine if this heating method fits your usage patterns, budget, and climate.
Heat smarter, not harder—and get the most out of your pool investment.
FAQs
Typically 5–10 years with regular maintenance.
Not recommended. Professional installation is usually required by code.
Depends on pool size—generally 250k–400k BTU for medium to large pools.
Natural gas is cheaper if available; propane is more expensive but better for remote areas.
Yes, especially in mild climates. Just ensure your plumbing is winterized if freezing temps occur.