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Universal H-Series Heater 150,000 BTU - Natural Gas, Low NOx (Open Line)

Hayward

SKU: W3H150FDN

The Universal H-Series is an energy efficient, high performance, installation adaptable commitment to the pool service professional.

Replacement SKU: W3HS150FDN

Features

Hayward Universal H-Series gas heaters are the “universal” energy efficient remedy for any new or existing pool or spa. An industry-leading hydraulic design reduces circulation pump run time to provide energy savings of up to 18% when compared to less efficient competitors. The energy efficiency of the Universal H-Series gas heater combines with environmentally friendly low NOx emissions, a standard cupro nickel heat exchanger, and ultimate installation flexibility to responsibly heat a pool or spa today and for years to come.

Features and Benefits

  • Standard cupro nickel heat exchanger
  • Excellent salt water and chemical corrosion resistance
  • Exclusive "Totally Managed" cupro nickel heat exchanger water flow
  • Same water velocity through all tubes for faster heating
  • Patented header by-pass design
  • Reduction in pump run-time results in significant cost savings
  • 2" x 2 1/2" CPVC union plumbing connections
  • Forced draft system constantly moves air through the combustion chamber at a precise flow rate, eliminating the need for a high-wind stack
  • Low NOx emissions - meets clean air quality standards

NOTE: Hayward Universal H-Series heaters meet or exceed the South Coast Air Quality Management District (SCAQMD Rule 1146.2) Low NOx emissions standards in all Low NOx areas that apply the SCAQMD standard.

Active Defrost No
Application New Construction, Aftermarket
Boost Mode No
Brand Hayward
Channel Open Line
Circuit Amps 5.5
Compressor Speed N/A
Cooling Capability No
Fuel Type Natural Gas (NA)
GTIN 610377387194
Heating Capacity (BTU/hr) 150,000
Hertz - Heaters 60 Hz
Kilowatts 44 kW
Warranty - Labor None
Low Ambient Operation Yes
Master Carton Qty 1
Maximum Breaker Size (Amps) 15
Minimum Operating Temperature 40 °F
Pallet Qty 1
Warranty - Parts 1-year
Phase - Heaters 1
Pool Type In Ground
Product Dimensions 24 " x 19 " x 29.5 "
Product Height 24 in
Product Length 29.5 in
Product Weight 135 lb
Product Width 19 in
Rear Clearance - Heaters 6"
Refrigerant No
Series Heaters Universal H-Series
Shipping Dimensions 30.6 " x 32.8 " x 33.3 "
Shipping Weight 150 lb
Side Clearance - Heaters 12"
Silent Mode No
Voltage - Heaters 120/240V
Water Flow Rate Max 125
Water Flow Rate Min 20

Questions & Answers

9 answered question(s)

06/24/26

Q: How does the gas ignition work? ie: Pilot light, Electric, etc What kind of electrical hook up does it need? ie: 120v, 240v? Does it come with a plug for electrical?

A:
Hi, the heater uses a hot surface igniter, and it can be wired either 120 or 240 volts.

By Hayward Support

06/24/26

Q: Please provide availability and pricing. I am replacing an existing H150 heater that has developed worsening tubing leaks due to corrosion. Is there a local distribution center/dealer in the San Diego area? When I entered my Lemon Grove 91945 location nothing came up. There is a nearby Leslie's Pool Supply that I have purchase other Hayward valves and products, but I would like to buy direct since I will be doing the installation as previously done.

A:
Hi, we do not sell direct. You can find a list of local Hayward Authorized Dealers by clicking on the Dealer Locator tab on the home page of our website Hayward.com

By Hayward Support

06/24/26

Q: I live in the Chicago area, with cold and snowy winters. Should I put a cover over my Swimpro 150k heater? If so, any recommendation on best winter cover to buy. Thanks

A:
Hi, your heater is designed to be out in the elements, but you should make sure you drain all the water out of it as outlined in the manual.

By Hayward Support

06/24/26

Q: Can this heater be installed with Omnilogic panel? asking for clarification. Thank you.

A:
Hi, yes any of the OmniLogic base systems can control any of our heaters.

By Hayward Support

06/24/26

Q: if I have this unit and I need to change it to LP what would be the charge for that

A:
Hi, we do not sell direct, but you can find a list of local Hayward Authorized Dealers by clicking on the Dealer Locator tab on the home page of our website Hayward.com

By Hayward Support

06/24/26

Q: can I change a natural gas pool heater to an LP gas

A:
Hi, the UHS heaters can be converted, but it should only be done by a certified gas installer. You can find a list of Hayward Authorized Dealers who can do this by clicking on the Dealer Locator tab on the home page of our website Hayward.com

By Hayward Support

06/24/26

Q: I have a Hayward Swim Pro Model # SW150DHN, Serial number 21132104107331001 that is leaking water. I believe it is coming from the Heat Exchanger Assembly. When I search Model SW150DHN, I get information about H150FD. Are they the same unit?

A:
Hi, yes the heat exchanger would be the same on both of these heaters.

By Hayward Support

06/24/26

Q: Can I get a remote WiFi controller?

A:
HI, there is no heater specific remote available for our heaters. That being said, you can connect this heater to one of our OmniLogic control systems and you will have access to the remote capability of the controller. To find a local pool company that...

By Hayward Support

06/24/26

Q: How many DREAM cocks are on this heater for winter prep I find the only one

A:
There is only one drain on these heaters. You can also disconnect the unions and blow air through the heat exchanger.

By Hayward Support