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  • Raypak Model 266A Electronic Digital Control Natural Gas, 266,000 BTU
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     $3,249.00
  • Raypak Model 206A Electronic Digital Control Natural Gas, 199,500 BTU
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     $2,999.00
  • Hayward Universal H-Series H250 Low NOx Pool Heater, 250,000 BTU, Natural Gas
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     $3,499.00
  • Hayward Universal H-Series H150 Low NOx Pool Heater, 150,000 BTU, Natural Gas
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     $2,599.00
  • Pentair Master Temp Pool Heater Natural Gas, 250,000 BTU
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     $3,509.00
  • Hayward Universal H-Series H250 Low NOx Pool Heater, 250,000 BTU, Propane Gas
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     $3,499.00
  • Raypak Model 406A Electronic Digital Control Natural Gas, 399,000 BTU
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     $4,129.00
  • Hayward Universal H-Series H200 Low NOx Pool Heater, 200,000 BTU, Propane Gas
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     $3,199.00
  • Hayward Universal H-Series H200 Low NOx Pool Heater, 200,000 BTU, Natural Gas
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     $3,199.00
  • Raypak Model 266A Electronic Digital Control Propane Gas, 266,000 BTU
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     $3,249.00
  • Raypak Model 336A Electronic Digital Control Natural Gas, 332,500 BTU
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     $3,659.00
  • Raypak Model 406A Electronic Digital Control Propane Gas, 399,000 BTU
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     $4,129.00
  • Hayward HeatPro Heat Pump, 140,000 BTU
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     $5,999.00
  • Raypak Crosswind V Series Heat Pumps
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     $4,334.00
  • Hayward HeatPro Heat/Cool Heat Pump, 100K BTU
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     $5,099.00
  • Hayward HeatPro Heat Pump, 90,000 BTU
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     $4,899.00
  • Pentair Master Temp Pool Heater Natural Gas, 400,000 BTU
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     $4,499.00
  • Hayward Universal H-Series H400 Low NOx Pool Heater, 400,000 BTU, Propane Gas
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     $4,499.00
  • Hayward Universal H-Series H400 Low NOx Pool Heater, 400,000 BTU, Natural Gas
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     $4,499.00
  • Raypak Avia Line NiTek Gas Heaters, Low NOx, WiFi Ready
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     $3,799.00
  • Raypak Model 406A Millivolt Natural Gas, 399,000 BTU
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     $4,494.00
  • Raypak Crosswind Series Heat Pumps
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     $1,999.00
  • Hayward Universal H-Series H150 Low NOx Pool Heater, 150,000 BTU, Propane Gas
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     $2,599.00
  • Hayward Universal H-Series H500 Low NOx Pool Heater, 500,000 BTU, Natural Gas - EXPERT LINE NLA
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Powerful Heating Solutions for Inground Pools

Inground pools offer more space, deeper water, and a unique swimming experience, but they also require more powerful pool heaters to maintain comfortable water temperatures. Whether you're looking to extend your swim season or enjoy warm water on demand, our selection of inground pool heaters includes high-performance options to suit every climate and budget.

From fast-heating gas models to energy-efficient heat pumps and eco-friendly solar systems, we carry heaters designed to deliver reliable, long-lasting performance for pools of all sizes.

Why Inground Pools Need Specialized Heating

Inground pools typically hold more water and have greater surface area than above ground pools, which means they lose heat more slowly—but also take longer to warm up. Choosing the right pool heater ensures:

  • Faster heat-up times
  • Consistent temperature maintenance
  • Lower long-term energy costs
  • Better performance in varying weather conditions

Whether you're heating a small backyard pool or a large custom installation, selecting the right BTU output and heater type is key to maximizing comfort and efficiency.

Types of Inground Pool Heaters

Gas Pool Heaters for Inground Pools

Gas heaters are the most powerful and fastest heating option available. They’re ideal for:

  • Cold climates
  • All-sized inground, especially deeper, pools
  • On-demand heating (e.g., evenings, weekends or special occasions)

Gas heaters can raise water temperature by several degrees per hour. Choose between natural gas or propane. Many modern gas heaters are engineered with low NOx technology, helping reduce emissions and meet stricter air quality standards—an important consideration for environmentally conscious pool owners.

Heat Pumps for Inground Pools

Pool heat pumps are a popular choice for energy-conscious homeowners in warmer regions. They use ambient air to heat your pool water and are best suited for:

  • Warm to sunbelt climates
  • Daily or frequent pool use
  • Long-term energy savings

While heat pumps take longer to heat water than gas heaters, up to 1–2°F per hour, they cost significantly less to operate and can maintain a steady temperature with minimal energy use.

Solar Heaters for Inground Pools

Solar pool heaters are the most sustainable option, using the sun’s energy to warm your pool. They’re ideal for:

  • Sunny climates
  • Eco-conscious homeowners
  • Long-term cost savings

Solar systems require space for panels—typically on a roof or nearby ground area—and work best when paired with a solar cover to retain heat overnight.

Choosing the Right Heater for Your Inground Pool

  • Pool Size: Larger pools require higher BTU output for effective heating.
  • Climate: Gas heaters are best for cold climates; heat pumps and solar heaters excel in warmer regions.
  • Usage Frequency: For daily use, heat pumps or solar systems are more cost-effective. For occasional use, gas heaters offer quick results.
  • Energy Source: Consider availability of natural gas, propane, or solar exposure.

Recommended Heater Size by Pool Volume

Use this chart to estimate the ideal BTU rating for your inground pool heater. Sizing up slightly can improve heating speed and efficiency, especially in cooler climates.

Pool Volume Recommended BTU (Gas) Recommended BTU (Heat Pump)
Up to 10,000 gallons 100,000–150,000 BTU 50,000–75,000 BTU
10,000–20,000 gallons 150,000–250,000 BTU 75,000–100,000 BTU
20,000–30,000 gallons 250,000–350,000 BTU 100,000–125,000 BTU
30,000+ gallons 350,000–400,000+ BTU 125,000+ BTU

Installation Considerations

Inground pool heaters often require professional installation, especially for gas and solar systems. Here’s what to keep in mind:

  • Gas Heaters: Require a gas line, or propane tank, electrical line, proper ventilation, and possibly permits.
  • Heat Pumps: Need either a 120V or a 240V electrical connection and adequate airflow.
  • Solar Heaters: Require panel space and plumbing integration with your pool’s circulation system.

Frequently Asked Questions

What’s the best heater for a large inground pool?

Gas heaters are typically the best choice for large pools due to their high BTU output and fast heating capabilities.

How long does it take to heat an inground pool?

Gas heaters can raise water temperature by 1–3°F per hour. Heat pumps and solar systems take longer but are more energy-efficient.

Can I install an inground pool heater myself?

If replacing an existing system, yes. If you’re installing a new inground pool heater that requires connections with gas and electrical lines, professional assistance is recommended.

Is it worth heating an inground pool?

Yes, especially if you want to improve your experience during swim season or increase your home’s value. A heated pool can be especially helpful earlier in the spring and later into the fall.

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