Best 400000 BTU Natural Gas Pool Heater in 2025
Updated on August 2025
#1
Recommended
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- Built with a durable, rust-resistant exterior
- Utilizes premix combustion technology for quick and efficient heating
- Includes safety features for reliable system protection
- Features rotatable and user-friendly operation controls
- Approved for both indoor and outdoor installation
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- Built with a durable, rust-resistant exterior
- Utilizes premix combustion technology for quick and efficient heating
- Includes safety features for reliable system protection
- Features rotatable and user-friendly operation controls
- Approved for both indoor and outdoor installation
#2
Value for Money
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- Premium heating performance with a 400,000 BTU capacity
- Durable cupro nickel heat exchanger resists corrosion and extends product life
- Efficient hydraulic design lowers pump run time, enhancing energy savings
- User-friendly front-panel access and control pad for simplified operation
- Complies with low NOx emissions standards for reduced environmental impact
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- Premium heating performance with a 400,000 BTU capacity
- Durable cupro nickel heat exchanger resists corrosion and extends product life
- Efficient hydraulic design lowers pump run time, enhancing energy savings
- User-friendly front-panel access and control pad for simplified operation
- Complies with low NOx emissions standards for reduced environmental impact
#3
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- Powerful heating with a 400,000 BTU output for large pools and spas
- Dual fuel compatibility with propane and natural gas
- Designed for outdoor use with weather-resistant materials
- Consistent water temperature for comfortable swimming
- Suitable for residential and commercial pool heating
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- Powerful heating with a 400,000 BTU output for large pools and spas
- Dual fuel compatibility with propane and natural gas
- Designed for outdoor use with weather-resistant materials
- Consistent water temperature for comfortable swimming
- Suitable for residential and commercial pool heating
#4
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- 400,000 BTU natural gas heater for effective pool and spa heating
- Compact design for easy installation in limited spaces
- Pre-wired digital controls for precise temperature adjustments
- Rotating digital display for convenient monitoring and ease of use
- Durable, corrosion-resistant housing for extended outdoor use
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- 400,000 BTU natural gas heater for effective pool and spa heating
- Compact design for easy installation in limited spaces
- Pre-wired digital controls for precise temperature adjustments
- Rotating digital display for convenient monitoring and ease of use
- Durable, corrosion-resistant housing for extended outdoor use
#5
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- Designed for durability in all weather conditions, ideal for efficient and versatile use.
- Features intermittent spark ignition with pilot safety controls that activate heat only when needed.
- Constructed from advanced materials that prevent residual heat retention, allowing for installation without metal heat sinks.
- Model Number: P-R406A-EN-C, Part Number: 009219.
- Equipped with ProTek Shield module for enhanced protection of the heat exchanger, prolonging heater lifespan.
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- Designed for durability in all weather conditions, ideal for efficient and versatile use.
- Features intermittent spark ignition with pilot safety controls that activate heat only when needed.
- Constructed from advanced materials that prevent residual heat retention, allowing for installation without metal heat sinks.
- Model Number: P-R406A-EN-C, Part Number: 009219.
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#6
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- LCD digital display for precise temperature measurement
- Tracks operational status and diagnostic information
- Resistant to high winds
- Headers built to resist corrosion
- Unitherm governor helps prevent condensation
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- LCD digital display for precise temperature measurement
- Tracks operational status and diagnostic information
- Resistant to high winds
- Headers built to resist corrosion
- Unitherm governor helps prevent condensation
#7
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- LCD digital display ensures precise temperature readings
- Tracks operational status and offers service diagnostics
- Designed to resist high winds
- Features corrosion-resistant headers for durability
- Unitherm governor effectively prevents condensation
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- LCD digital display ensures precise temperature readings
- Tracks operational status and offers service diagnostics
- Designed to resist high winds
- Features corrosion-resistant headers for durability
- Unitherm governor effectively prevents condensation
#8
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- Part Number: 014938
- Model Number: P-R206A-EN-X
- Constructed with cupro-nickel for durability in gas pool and spa heating
- Designed in a pagoda style for reliable operation in harsh weather
- Features a microprocessor-controlled thermostat for precise temperature regulation
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- Part Number: 014938
- Model Number: P-R206A-EN-X
- Constructed with cupro-nickel for durability in gas pool and spa heating
- Designed in a pagoda style for reliable operation in harsh weather
- Features a microprocessor-controlled thermostat for precise temperature regulation
#9
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- Part Number: 017400
- Model Number: B-R266A-EN-X
- ASME rated for commercial swimming pools and spas at elevations up to 2000 ft
- Features a digital display screen
- Includes electronic ignition
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- Part Number: 017400
- Model Number: B-R266A-EN-X
- ASME rated for commercial swimming pools and spas at elevations up to 2000 ft
- Features a digital display screen
- Includes electronic ignition
#10
12% Off
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- High-performance heater offering premium features at an affordable price
- Class-leading 82% energy efficiency
- 1-1/2 inch plumbing connection suitable for smaller bodies of water, including aboveground pools, spas, and inground pools up to 15,000 gallons
- Utilizes pre-mixed combustion technology for rapid heating
- User-friendly digital display and controller
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- High-performance heater offering premium features at an affordable price
- Class-leading 82% energy efficiency
- 1-1/2 inch plumbing connection suitable for smaller bodies of water, including aboveground pools, spas, and inground pools up to 15,000 gallons
- Utilizes pre-mixed combustion technology for rapid heating
- User-friendly digital display and controller
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