Best Pentair 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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- 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
#3
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- 250,000 BTU natural gas heater for efficient pool and spa heating
- Compact design with a rotating digital display for versatile installation
- Pre-mixed gas combustion technology for consistent heating and fuel efficiency
- Digital controls for easy temperature adjustment and diagnostics
- Durable copper heat exchanger with rust-resistant housing for longevity
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- 250,000 BTU natural gas heater for efficient pool and spa heating
- Compact design with a rotating digital display for versatile installation
- Pre-mixed gas combustion technology for consistent heating and fuel efficiency
- Digital controls for easy temperature adjustment and diagnostics
- Durable copper heat exchanger with rust-resistant housing for longevity
#4
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
#5
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- Built to last with a durable, rust-resistant exterior
- Utilizes premix combustion technology for quick and efficient heating
- Incorporates safety features for reliable system protection
- Features intuitive, rotatable operation controls for ease of use
- Approved for both indoor and outdoor installation
Read More
- Built to last with a durable, rust-resistant exterior
- Utilizes premix combustion technology for quick and efficient heating
- Incorporates safety features for reliable system protection
- Features intuitive, rotatable operation controls for ease of use
- Approved for both indoor and outdoor installation
#6
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- 250 ASME HD natural gas heater
- Master Temp technology
- User-friendly and reliable features
- Assembly not needed
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- 250 ASME HD natural gas heater
- Master Temp technology
- User-friendly and reliable features
- Assembly not needed
#7
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- High-performance heater designed for affordability
- Class-leading energy efficiency of 82%
- 1-1/2 inch plumbing connection suitable for smaller water bodies including aboveground pools, spas, and inground pools up to 15,000 gallons
- Pre-mixed combustion technology ensures rapid heating
- User-friendly digital display and controller
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- High-performance heater designed for affordability
- Class-leading energy efficiency of 82%
- 1-1/2 inch plumbing connection suitable for smaller water bodies including aboveground pools, spas, and inground pools up to 15,000 gallons
- Pre-mixed combustion technology ensures rapid heating
- User-friendly digital display and controller
#8
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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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#9
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- Raypak Digital Cupro-Nickel Natural Gas Heater provides reliable heating for pools and spas
- Pagoda design enhances durability in adverse weather
- Features a microprocessor-controlled thermostat for precise temperature management
- Constructed from powder-coated galvanized metal for enhanced longevity
- Compatible with remote control for convenient operation
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- Raypak Digital Cupro-Nickel Natural Gas Heater provides reliable heating for pools and spas
- Pagoda design enhances durability in adverse weather
- Features a microprocessor-controlled thermostat for precise temperature management
- Constructed from powder-coated galvanized metal for enhanced longevity
- Compatible with remote control for convenient operation
#10
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- Polymer headers eliminate rust stains on pool or spa surfaces.
- Constructed from a single piece of extruded copper for durability.
- Ensures consistent heating performance in various weather conditions.
- No fans are needed to address drafting issues.
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- Polymer headers eliminate rust stains on pool or spa surfaces.
- Constructed from a single piece of extruded copper for durability.
- Ensures consistent heating performance in various weather conditions.
- No fans are needed to address drafting issues.
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