The 9 best rheem 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

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

Natural Gas^Automatic Water bypass^Digital Thermostat

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

LCD digital display provides accurate temperature

Monitors operational status as well as service diagnostics

High-wind resistance

Corrosion-resistant headers

Unitherm governor prevents condensation

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

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

Continuous Hot Water & Comfort When Needed – Provides enough hot water for your entire house, even when using multiple applications such as a shower and dishwasher

Save on Energy Costs – High Efficient Water Heater only runs when needed

Save Water– Water Saving Setting saves up to 1,100 gallons of water per year

Hot-start programming keeps the water heater in a ready state, avoiding any cold-water bursts

Save Space - New smaller size, 19%, and reduced weight by 22% compared to the previous model for easy installation and space savings