Propane Pool and Spa Heater for In-Ground Pools and Spas - Hayward Universal H-Series 🛍️
Heat Up Your Pool and Spa with the Powerful and Efficient Hayward W3H400FDP Propane Heater - Perfect for In-Ground Pools and Spas!
Hayward Propane Pool and Spa Heater - 400,000 BTU Universal H-Series
The Hayward W3H400FDP Universal H-Series propane pool and spa heater is the perfect solution for keeping your in-ground pool and spa warm all year round. With a powerful 400,000 BTU output, this heater is designed to efficiently heat large pools and spas while maintaining optimal energy efficiency.
- High Heating Capacity: The Hayward W3H400FDP Universal H-Series 400,000 BTU Propane Pool and Spa Heater is designed to heat large in-ground pools and spas quickly and efficiently. With a high heating capacity, it can quickly raise the temperature of your pool or spa to your desired level.
- Energy Efficient: The heater features an industry-leading thermal efficiency rating, which means it can heat your pool or spa without consuming excessive amounts of propane. This can help you reduce your energy bills and save money in the long run.
- User-Friendly Controls: The heater features an easy-to-use digital control panel that allows you to set the temperature of your pool or spa with precision. The control panel also includes diagnostic codes that help you troubleshoot any issues that may arise.
- Durable Construction: The Hayward W3H400FDP Universal H-Series 400,000 BTU Propane Pool and Spa Heater is built to last. It features a corrosion-resistant heat exchanger and a durable ext
The Hayward W3H400FDP Universal H-Series 400,000 BTU Propane Pool and Spa Heater is the perfect solution to keep your in-ground pool or spa warm and comfortable throughout the year. With its advanced technology and high heating capacity, this heater can quickly and efficiently heat up large pools and spas. The heater is designed with a versatile universal design that allows it to be used with any existing filtration system or pool/spa automation system. Its compact size and easy installation process make it a great option for both new and existing pool and spa owners. The heater is also equipped with a range of safety features, including a rust-resistant heat exchanger and a high-limit pressure switch, ensuring that your pool or spa is always safe and secure. With the Hayward W3H400FDP Universal H-Series 400,000 BTU Propane Pool and Spa Heater, you can enjoy the luxury of a warm and comfortable pool or spa all year round.
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Updated October 2025
#1
🏅Editor’s Pick
Hayward Universal H-Series Pool and Spa Heater
Heat up your in-ground pool and spa with ease using the powerful Hayward W3H150FDN Universal H-Series 150,000 BTU Natural Gas Heater.
✅ Reviewed selection • Updated October 2025
- High BTU Output: The Hayward W3H150FDN Universal H-Series 150,000 BTU Natural Gas Pool and Spa Heater is a powerful heater that can quickly and efficiently heat up large in-ground pools and spas.
- Energy Efficient: The heater is designed to be energy efficient, which means that it can save you money on your energy bills over time. It also has a low NOx emission rating, making it an environmentally friendly option.
- Easy to Use: The heater is easy to use and comes with a user-friendly digital control panel that allows you to set and adjust the temperature of your pool or spa with ease.
- Durable and Reliable: The Hayward W3H150FDN Universal H-Series 150,000 BTU Natural Gas Pool and Spa Heater is built to last, with a corrosion-resistant heat exchanger and a durable design that can withstand harsh outdoor conditions. It also comes with a 1-year warranty for added peace of mind.
#2
🏅Best Value
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Effortlessly Heat Your In-Ground Pool and Spa with Hayward W3H400FDN Universal H-Series Natural Gas Heater - 400,000 BTU.
✅ Reviewed selection • Updated October 2025
- High heating power: The Hayward W3H400FDN Universal H-Series pool and spa heater has a heating power of 400,000 BTUs, making it ideal for heating large in-ground pools and spas quickly and efficiently.
- Energy-efficient: Despite its high heating power, the Hayward W3H400FDN Universal H-Series pool and spa heater is designed to be energy-efficient, helping you save on your energy bills and reduce your carbon footprint.
- User-friendly: The Hayward W3H400FDN Universal H-Series pool and spa heater is designed with the user in mind, featuring an easy-to-read digital display and intuitive controls that make it easy to set and adjust the temperature of your pool or spa.
- Durable and reliable: Made with high-quality materials and built to last, the Hayward W3H400FDN Universal H-Series pool and spa heater is a reliable and durable choice for heating your in-ground pool or spa, ensuring that you can enjoy your pool or spa year-round.
#3
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EcoSmart Pool Heater
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✅ Reviewed selection • Updated October 2025
- Energy Efficient: The EcoSmart SMART POOL 27 Electric Tankless Pool Heater is designed to be energy efficient, which means it can save you money on your electricity bill. It uses self-modulating technology to adjust the power output based on the demand, ensuring that you only use the energy you need.
- Easy to Install: The EcoSmart SMART POOL 27 Electric Tankless Pool Heater is easy to install and can be done by a professional or a DIY enthusiast. It does not require any venting or gas lines, making it a great option for those who want a hassle-free installation.
- Durable: This pool heater is built to last, thanks to its high-quality materials and construction. It is made from stainless steel and has a corrosion-resistant heating element, which ensures that it can withstand the harsh pool environment.
- Smart Technology: The EcoSmart SMART POOL 27 Electric Tankless Pool Heater comes with smart technology that allows you to control the temperature of your pool remotely. You ca
#4
Raypak Digital Natural Gas Pool Heater - 266,000 BTU
Enjoy Perfectly Heated Pool Water with Raypak's 266,000 BTU Digital Electronic Ignition Natural Gas Pool Heater
✅ Reviewed selection • Updated October 2025
- Efficient Heating: The Raypak 266,000 BTU Digital Electronic Ignition Natural Gas Pool Heater is highly efficient and can quickly heat up your pool to your desired temperature.
- Digital Electronic Ignition: With digital electronic ignition, this pool heater is easy to start and operate. You don't have to worry about lighting pilot lights or manually igniting the heater.
- Durable Construction: The Raypak 266,000 BTU Digital Electronic Ignition Natural Gas Pool Heater is built to last. It features a corrosion-resistant heat exchanger and a tough polymer header that can withstand harsh weather conditions.
- User-Friendly Control Panel: The pool heater comes with a user-friendly control panel that makes it easy to set and adjust the temperature of your pool. The display is easy to read, and the controls are intuitive and straightforward.
#5
Digital Natural Gas Pool Heater by Raypak
Heat Your Pool Quickly and Efficiently with Raypak's 406,000 Btu Digital Natural Gas Heater Featuring Cupro Nickel Technology - Ray-014941.
✅ Reviewed selection • Updated October 2025
- High Heating Capacity: The Raypak 406,000 Btu Digital Natural Gas Pool Heater has an impressive heating capacity, making it ideal for large swimming pools or spas. It can quickly raise the temperature of the water, allowing you to enjoy your pool or spa even on cooler days.
- Energy-Efficient: The heater is designed to be energy-efficient, which means that it can help you save money on your energy bills. It features a digital display that allows you to easily adjust the temperature and set the heater to run only when needed.
- Durable Construction: The Raypak 406,000 Btu Digital Natural Gas Pool Heater is made from high-quality materials, including a cupro-nickel heat exchanger. This ensures that the heater is durable and long-lasting, even when exposed to harsh pool chemicals and weather conditions.
- Easy to Use: The digital display and intuitive controls make the Raypak 406,000 Btu Digital Natural Gas Pool Heater easy to use. It also features a self-diagnostic system that c
#6
Raypak Natural Gas Heater - PR156AENC
Heat Your Pool Efficiently with Raypak 014784 PR156AENC 150000 BTU Natural Gas Heater
✅ Reviewed selection • Updated October 2025
- High Heating Capacity: The Raypak 014784 PR156AENC 150000 BTU Natural Gas Heater has a heating capacity of 150,000 BTUs, making it ideal for larger pools and spas.
- Energy Efficient: This natural gas heater has an energy efficiency rating of 83%, which means it can save you money on your energy bills compared to other pool heaters.
- Durable Construction: The Raypak 014784 PR156AENC is built with high-quality materials and features a corrosion-resistant heat exchanger. This ensures that the heater will last for many years, even in harsh pool environments.
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#7
Raypak Digital Natural Gas Heater with Electronic Ignition
Efficiently Heat Your Pool with Raypak's Polymer Headers Digital Control Natural Gas Heater
✅ Reviewed selection • Updated October 2025
- Efficient Heating: The Raypak 014784 Polymer Headers Digital Control/Electronic Ignition/Natural Gas P-R156A-EN-C Heater is designed to provide efficient heating for your pool or spa. It has a high thermal efficiency rating, which means it can heat your pool or spa quickly and efficiently.
- Durable and Long-lasting: The polymer headers of this heater are corrosion-resistant, which makes them durable and long-lasting. The electronic ignition system ensures that the heater starts up quickly and reliably every time, without the need for a pilot light.
- Digital Control: The digital control system of this heater allows you to easily set and adjust the temperature of your pool or spa. It also has a diagnostic code display that helps you troubleshoot any issues that may arise.
- Natural Gas: This heater runs on natural gas, which is a clean and efficient fuel source. It is also more cost-effective than other fuel sources, such as propane or electricity.
#8
Propane Pool Heater by Raypak - 150K BTU (RYPR15)
Experience Perfectly Heated Pools All-Year-Round with Raypak 014786-156A Propane Gas Pool Heater - The Ultimate Solution for Your Pool Heating Needs.
✅ Reviewed selection • Updated October 2025
- High Heating Capacity: The Raypak 014786-156A Propane Gas Pool Heater has a heating capacity of 150,000 BTU, which makes it suitable for heating large swimming pools quickly and efficiently.
- Propane Gas Fuel: The use of propane gas as a fuel source makes the Raypak 014786-156A Propane Gas Pool Heater a cost-effective option for pool owners. Propane gas is readily available and is often cheaper than other fuel sources.
- Easy to Install: The Raypak 014786-156A Propane Gas Pool Heater is designed for easy installation, which means that pool owners can have it up and running in no time. It also comes with a user-friendly digital control panel that makes it easy to operate.
- Suitable for High Altitudes: The Raypak 014786-156A Propane Gas Pool Heater is designed to work efficiently in high altitude areas up to 1999ft elevation. This makes it a great option for pool owners living in areas with high altitudes.
#9
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✅ Reviewed selection • Updated October 2025
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- Compact Design: This heater has a compact design that makes it ideal for small pools up to 15,000 gallons. Its small size also makes it easy to install and maintain.
- High Heating Capacity: With a heating capacity of 125,000 BTUs, the Pentair EC462025 MasterTemp 125 is capable of heating your pool or spa quickly and efficiently.
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#10
Raypak Natural Gas Pool Heater - 105,000 BTU
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✅ Reviewed selection • Updated October 2025
- High Heating Capacity: The Raypak 014779 PR106AENC 105000 BTU Natural Gas Pool Heater has a heating capacity of 105,000 BTUs, which makes it highly efficient in heating up large swimming pools quickly.
- Energy Efficient: This pool heater is designed to be highly energy efficient, which means it can save you money on your monthly energy bills while still keeping your pool warm and comfortable.
- Durable Construction: The Raypak 014779 PR106AENC 105000 BTU Natural Gas Pool Heater is built to last with its corrosion-resistant materials and a copper heat exchanger that can withstand harsh weather conditions.
- Easy to Use: This pool heater is user-friendly and easy to operate, with simple controls that allow you to adjust the temperature of your pool water to your desired level. Additionally, it comes with a digital display that makes it easy to monitor and adjust the temperature.
#11
Beige H-Series Pool Heater by Hayward.
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✅ Reviewed selection • Updated October 2025
- High Efficiency: The Hayward W3H135FDP H-Series Pool Heater is designed to be highly efficient, with a low NOx emissions rating. This means that it is not only better for the environment, but it can also save you money on your energy bills.
- Durable Construction: The pool heater is made from high-quality materials, including corrosion-resistant copper fin tubes and a stainless steel burners. This ensures that the heater will last for many years, even with regular use.
- Easy to Use: The Hayward W3H135FDP H-Series Pool Heater is designed to be user-friendly, with a digital control panel that makes it easy to set and adjust the temperature. It also has a self-diagnostic feature that can help you troubleshoot any issues that may arise.
- Versatile: The pool heater is designed to work with a variety of pool sizes and types, making it a versatile choice for many different pool owners. It also has a compact design that makes it easy to install in a variety of locations.
#12
Raypak Pool and Spa Heater - 105,000 BTU (Natural Gas)
Experience Unmatched Comfort with Raypak 105,000 BTU Natural Gas Swimming Pool and Spa Heater
✅ Reviewed selection • Updated October 2025
- Efficient Heating: The Raypak 105,000 BTU Swimming Pool and Spa Heater is designed to efficiently heat your pool or spa, which means that you can enjoy warm water without having to wait for a long time.
- Natural Gas Powered: The heater is powered by natural gas, which is a cost-effective and eco-friendly fuel source. This means that you can enjoy a warm pool or spa without having to worry about your energy bills skyrocketing.
- Durable: The Raypak 105,000 BTU Swimming Pool and Spa Heater is built to last. It is made from high-quality materials that are designed to withstand the elements and resist corrosion, ensuring that you can enjoy warm water for many years to come.
- Easy to Use: The heater is designed to be easy to use, with a simple control panel that allows you to adjust the temperature and other settings as needed. This means that you can quickly and easily get your pool or spa to the perfect temperature without any hassle.