The 11 best pentair pool heaters of 2025

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

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

Built to last with tough rust proof exterior

Premix combustion technology for fast and efficient warm-ups

Built in safety features to ensure system protection

Rotatable, easy-to-use, intuitive operation controls

Certified for outdoor and indoor installation

Built to last with tough rust proof exterior

Premix combustion technology for fast and efficient warm-ups

Built in safety features to ensure system protection

Rotatable, easy-to-use, intuitive operation controls

Certified for outdoor and indoor installation

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

The Hayward Universal H-Series 400,000 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

HEATING CAPACITY: Powerful 250,000 BTU natural gas heater designed for efficient pool and spa heating

COMPACT DESIGN: Space-saving unit with rotating digital display for flexible installation options and easy monitoring

PERFORMANCE FEATURES: Pre-mixed gas combustion technology ensures consistent heating and optimal fuel efficiency

OPERATIONAL CONTROLS: User-friendly digital controls with temperature adjustment and diagnostic indicator lights

CONSTRUCTION: Durable copper heat exchanger and rust-resistant housing built for long-lasting performance

Extend Your Swim Season: The pool heat pump features a dual-mode heating and cooling system that maintains optimal water temperatures year-round. Precision control ensures heating from 47–104℉ and cooling from 47–83℉, allowing you to enjoy extended swimming sessions through autumn’s crisp chill and spring’s cool mornings.

Rapid Heating & APP Control: Engineered for speed and efficiency, it delivers 35,000 BTU warmth in hours, perfect for large pools, up to 9,000-gallon systems, or chilly climates. Take full control via the app & control panel. Adjust temperatures remotely, track energy use, and program heating schedules to fit your lifestyle.

Inverter Energy Saving: Intelligent heat pump system featuring full DC variable frequency technology delivers 15.8 COP for maximum heating output. Adaptive frequency conversion algorithm dynamically adjusts power in real-time, achieving 70% energy savings over traditional electric heating and 40% higher efficiency than gas systems.

Ultra-Quiet & Auto-Defrost: Variable frequency technology reduces operational noise to just 48 dB, paired with an intelligent defrosting system featuring automatically initiated cycles every 40 minutes that complete the process in just 5 minutes, ensuring uninterrupted winter operation with continuous heating performance.

Easy to Assemble: Our heat pump features 3 versatile connection options designed to integrate with all pools, (1.25" & 1.5" hose adapter, 1.5" adapter conversion kit, 1.5" PVC pipe converter), ensuring hassle-free installation and optimal performance. Enjoy peace of mind with our 3-year warranty. Dive into comfort and reliability.

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: 009216 | Model Number: P-R206A-EN-C

High efficiency, Small footprint

【Compatibility】Pool Heater Repair Kit Compatible with Pentair Master Temp & Max E Therm Pool Heaters

【Replace Part Number】42002-0024S Stack Flue Sensor Replacement, 42001-0053S Thermistor Sensor Replacement, 42001-0060S (3902) Pressure Switch Replacement, 42002-0025S Gas Shutoff Switch 140°F Replacement, 42001-0063S High Limit Switch 135°F Replacement

【High Quality】Made of high quality materials, high reliability and durability, providing the perfect heating experience for your pool or spa.

【Easy Installation】Includes all accessories for installation. Watching the video on YouTube will help you to complete the installation faster

【Perfect Service】Friendly return policy and customer service. If you have any questions, please contact us by email, we will reply you within 24 hour.

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