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Hayward H-Series Natural Gas Pool Heater for Inground Pools 150,000 BTU

  • Based on 160 reviews
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Size: 150,000 BTU (W3H150FDN)


Features

  • EASY TO USE: Intuitive inground pool heater control panel enables easy operation and maintenance. The digital LED display helps maintain pool water temperature while monitoring pool water heater performance with self-diagnostic capabilities
  • MULTIPLE COVERAGE OPTIONS FOR POOLS AND SPAS: This gas pool heater and pool and spa heater suits in-ground pools and spas up to 450 sq ft with a natural gas connection; additional models cover 600, 750, or 1,200 sq ft
  • ENERGY SAVING AND BUILT TO LAST: Efficiently designed pool heater for inground pools helps deliver consistent hot water for swimming pools, reduce pump run time for energy savings, and protect against corrosion caused by unbalanced water chemistry
  • SIMPLE INSTALLATION: This 150,000 BTU Hayward natural gas pool heater allows flexible gas and electric connections on the right or left side, with an H-Series built-in 3/4" gas connection for easier fuel line setup
  • LOW ENVIRONMENTAL IMPACT: Hayward gas pool heaters for inground use are certified for low-NOx emissions and eco-friendly operation, reducing circulation pump run time while delivering a reliable swimming pool heater solution for inground pools

Description

These swimming pool heaters-specifically the Universal H-Series 150,000 BTU Natural Gas model from Hayward-deliver reliable, long-lasting comfort for pools and spas up to 400 ft. Serving equally well as a versatile pool and hot tub heater, the unit offers exceptional protection against corrosion and premature failure caused by unbalanced water chemistry,ensuring season after season of premium heating performance. Industry-leading hydraulic design combines with lightning-fast speed-to-heat capability, so users spend less time waiting and more time swimming. Ideal to maintain water temperature and extend swim season into spring, fall, or evening swims, the Universal H-Series also meets strict low-NOx air-quality standards with minimal environmental impact.

Product Dimensions: 29.5 x 19 x 24 inches


Item Weight: 150 pounds


Manufacturer: Hayward


Item model number: W3H150FDN


Frequently asked questions

The Hayward Universal H-Series heater operates on natural gas, making it energy efficient and economical.

Yes, the heater is designed to keep the water warm in both in-ground pools and spas, providing a comfortable swimming environment irrespective of the weather.

As the name indicates, this Hayward heater has a heat output of 150,000 BTU, allowing it to heat up a large amount of water quickly and effectively.

While it's generally recommended to have a professional install it due to the complexity of gas-fueled appliances, the straightforward design of the heater does allow for do-it-yourself installations if you're handy and follow all safety precautions.

Top Amazon Reviews

🚀 Abunda's Overview

This is our summary and key points to consider based on customer reviews.


The Hayward Gas Heater gets a generally positive review from most customers. Reviewers highlight its easy installation process, excellent power in elevating their pool's temperature swiftly, and much lower electricity bills. Nevertheless, several customers mentioned encountering issues post-installation with warranty service and certain units had manufacturing defects leading to early failure or damage.

Pros

  • 👍 Easy to install
  • đŸ”Ĩ Heats the pool quickly
  • 👌 Direct replacement for older models
  • 💰 Big savings on electricity bills compared to heat pumps

Cons

  • 👎 Poor customer service and warranty handling
  • âš ī¸ Some units have manufacturing defects
  • â˜šī¸ Expect some issues with durability

Should I Buy It?

If you are well-prepared to potentially deal with initial hiccups post-installation and less than stellar customer service, the Hayward Gas Heater is a solid choice for its heating performance and would notably save on your energy bills compared to traditional heat pumps. However, for long-term peace of mind and better post-sales service, you might want to explore other brands.


  • The Hayward Natural Gas unit is NO# 1
Size: 150,000 BTU (W3H150FDN)
I purchased the 150,000 BTU natural gas unit on sale in late May. I installed the unit with my friend that is a licensed NYS electrician. The install was quite easy. I actually fired it up in minutes once we completed the installation. My pool holds 20,000 gals of water, the actual water Temperature at start up was 74 degrees. I ran the pool pump & Heater from 11:30 PM To 6:00 AM. In the 7 hours time the pool Temperature Rose from 74 degrees to 92 degrees, that is a rise of 18 degrees in 7 hrs. The ambient outside Temperature was 63 degrees, I did NOT use my solar pool cover for this test. This LITTLE hayward heater is a DYNOMO. For the past 7 years I had a 110k electric heat pump and it to 5 days to reach the above temperatures. I purchased it on Amazon for $4195 Biggest WASTE OF MONEY in the north east. I made the switch for the above reasons and MOST OF ALL MY ELECTRIC BILL was $810 a MONTH with that Stupid heat pump. I even called my electric company and spoke to the Director of Engineering which is my equivalent and he agreed heat pumps are NOT as economical as alot of the so called experts say. Lastly the Hayward 150k BTU heater is a FIVE STAR in my professional opinion. ... show more
Reviewed in the United States on July 13, 2023 by eddie macina

  • Works well
Size: 150,000 BTU (W3H150FDN)
Great pool heater!
Reviewed in the United States on September 7, 2026 by Acrandall

  • Remember to turn in the natural gas switch- ON
Size: 150,000 BTU (W3H150FDN)
Installation was straight forward and relatively easy. Remember to turn on the little-bitty-extremely small natural gas switch ON.
Reviewed in the United States on July 22, 2026 by JKT

  • Buyer Beware
Size: 150,000 BTU (W3H150FDN)
Worked when initially installed. After a year the heat exchanger leaked. Within warranty period yet Hayward doesn't warranty it due to water ph and acidity out of tolerance. A few tenths off according to test strips. Forget even trying to contact Hayward - all automation, they deflect to local service companies. Horrible customer service all the way around. You think when you buy a name like Hayward you're buying a quality product only to find out it's junk. I have a $3,000 useless box now that lasted a year. Buyer beware. They claim they should last 7-10 years. Very disappointed without any recourse from Hayward. ... show more
Reviewed in the United States on July 11, 2026 by sam

  • Easy swap of pool heater.
Size: 150,000 BTU (W3H150FDN)
Three year old Hayward gas heater started leaking heater core with steam emitted. New heater easy replacement with water connections and natural gas connection in same positions. Quickly disconnect old heater and connect new heater. With price of natural gas increasing just wish new heater was more efficient. ... show more
Reviewed in the United States on May 6, 2026 by Richard W. Tribou

  • unit quit and asurion 2 year warranty is worthless they charged me but don't cover this
Size: 150,000 BTU (W3H150FDN)
Hayward has no one to help in my area with a warranty as its brand-new gives code BD...so now i will request a credit on my so called worthless warr. and pay for the repairs as can't get any help from Hayward with the problem. crazy cuz i'm in Florida and pools are common here and the hayward locator gave me one dealer and they said sorry can't help with a gas heater ... show more
Reviewed in the United States on September 26, 2023 by Don C

  • Great pool heater
Size: 150,000 BTU (W3H150FDN)
Wonderful product
Reviewed in the United States on June 9, 2026 by julie

  • Phenomenal heater
Size: 150,000 BTU (W3H150FDN)
Phenomenal heater. Almost gave it Four stars for not aligning pipe sizing for gas OR water, but if you can't change that easily then you shouldn't be buying it and installing it yourself
Reviewed in the United States on December 4, 2025 by Chris K.

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