Best Pool Gas Heaters In May 2025

To help you choose the Best Pool Gas Heaters, we’ve put together this comprehensive guide. We have tried to cover as much variety as possible. Hope you will find it helpful!

To help you in your search, we have completed this list of the Best Pool Gas Heaters.

Top Rated Best Pool Gas Heaters Of 2025

Rank	Product Name	Score
1	Raypak 206,000 BTU Digital Electronic Ignition Natural Gas Pool Heater Buy Now	9.7 Buy Now
2	FibroPool FH 220 Swimming Pool Heater Heat Pump Buy Now	9.5 Buy Now
3	Rinnai V Series HE Tankless Hot Water Heater: Outdoor Installation Buy Now	9.1 Buy Now
4	Hayward W3H400FDN Universal H-Series 400,000 BTU Pool and Spa Heater, Natural Gas Buy Now	8.8 Buy Now

1. Raypak 206,000 BTU Digital Electronic Ignition Natural Gas Pool Heater

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9.7/10 our score

Buy Now

High efficiency, small footprint
Smart microprocessor controls diagnostic read out and continuously monitors operating status
Plumb directly from provided 2" pvc threaded union
Digital control with liquid crystal display (lcd) for temperature selection and heater settings
Capron resin headers prevent rust stains from harming pool surface

2. FibroPool FH 220 Swimming Pool Heater Heat Pump

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9.5/10 our score

Buy Now

4.85 cop. best in its class
20,000 btu/hr heating capacity
240 volts- 60 hz american voltage
Suitable for all hot tubs
Suitable for pools up to 7,500 gallons in coastal climates

3. Rinnai V Series HE Tankless Hot Water Heater: Outdoor Installation

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9.1/10 our score

Buy Now

V53den he high efficiency tankless hot water heater - natural gas: outdoor installation only
Control-r 2.0 mobile app features timers and schedules throughout the day and allows you to remotely put the system into vacation mode.
Up to 5.3 gpm hot water flow rate (varies by groundwater temp)
Residential factory warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts)
Endless hot water for your entire home

4. Hayward W3H400FDN Universal H-Series 400,000 BTU Pool and Spa Heater, Natural Gas

Buy Now

8.8/10 our score

Buy Now

A durable cupro nickel heat exchanger offers exceptional protection against corrosion and premature failure caused by unbalanced water chemistry
Industry-leading hydraulic design reduces circulation pump run time to provide major energy savings
Low nox emissions meet air quality standards in all low-nox areas, ensuring low environmental impact
The hayward universal h-series 400,000 btu natural gas heater delivers premium heating performance for years of reliable, long-lasting comfort
Front-panel-only access and intuitive control pad provide easy operation, service and maintenance