The 10 best natural gas pool heaters of 2025

Built to withstand various weather conditions, perfect solution for environments requiring efficiency, convenience and versatility.

Intermittent spark ignition pilot safety controls. Pilot only comes on when there is a call for heat.

Space-age material means the heater won't retain residual heat after it is turned off, allowing it to be installed without the use of costly metal heat sinks.

Part Number: 009217 | Model Number: P-R266A-EN-C

Gas powered and suitable for use with swimming pools and spas

The Hayward Universal H-Series 150,000 BTU Natural Gas Heater delivers premium heating performance for years of reliable, long-lasting comfort

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

Front-panel-only access and intuitive control pad provide easy operation, service and maintenance

Low NOx emissions meet air quality standards in all low-NOx areas, ensuring low environmental impact

Polymer headers prevent rust stains on your pool or spa surface

All-Copper-Fin-Tube Heat Exchanger; Made from a single piece of extruded copper

Delivers uninterrupted heating performance regardless of falling leaves, wind, airborne debris, rain, downdrafts, updrafts, sleet, snow, etc

Doesn't require fans to combat drafting problems

High-performance, affordable heater with premium features

82% energy efficiency is highest in class

1-1/2 in. Plumbing connection -- ideal for smaller bodies of water, including aboveground pools, spas and inground pools up to 15,000 gallons

Pre-mixed combustion technology for ultra-fast heat up

Easy-to-use digital display/controller

Durable cupro nickel heat exchanger

Industry-leading hydraulic performance with faster speed-to-heat capability

Intuitive and easy-to-operate electronic panel

Exclusive "Totally Managed" cupro nickel heat exchanger water flow

Low NOx emissions—meets clean air quality standards

Integral Fin Copper Exchanger Tube

Corrosion-Free Polymer Headers

Backlit LCD Controls

Self-Diagnostic Microprocessor Controlled Ignition

Part Number: 014784 | Model Number: P-R156A-EN-C

Allows you to extend your swim season, open your pool earlier and close it later.

Perfect choice for above-ground pools and spas

2" water connections

Perfect for above-ground pools and spas

HEATING CAPACITY: Powerful 400,000 BTU natural gas heater designed for efficient pool and spa heating

COMPACT DESIGN: Space-saving footprint allows for easy installation in tight spaces while maintaining high performance

TEMPERATURE CONTROL: Pre-wired digital controls enable precise temperature adjustments for optimal comfort

OPERATIONAL FEATURES: Rotating digital display for easy monitoring and user-friendly operation interface

CONSTRUCTION: Durable housing with corrosion-resistant components designed for long-term outdoor installation

Natural Gas^Automatic Water bypass^Digital Thermostat

Part Number: 014941

Model Number: P-R406A-EN-X

Cupro-nickel gas pool and spa heater

Pagoda design ensures heater stays active in harsh weather conditions

Microprocessor controlled thermostat