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

Hayward

SKU: W3H150FDP

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

Replacement SKU: W3HS150FDP

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, Renovation, Aftermarket
Boost Mode No
Brand Hayward
Channel Open Line
Circuit Amps 5.5
Compressor Speed N/A
Cooling Capability No
Fuel Type Propane (LP)
GTIN 610377387200
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

5 answered question(s)

06/24/26

Q: Can this be switched to natural gas.

A:
Hi, yes it can be converted to natural gas, but it should only be done by a qualified gas installer.

By Hayward Support

06/24/26

Q: Propane line inlet size

A:
Hi, the valve has a 3/4" NPT opening for the gas line.

By Hayward Support

06/24/26

Q: Why do specifications show 44 KW when it is supposed to be a propane heater?

A:
HI, 44Kw is the equivalent of 150,000 BTU's of heat. (3.4 BTU's per watt). That is the heating capacity of this heater in watts.

By Hayward Support

06/24/26

Q: Does this model have an exhaust kit to vent the exhaust out of a roof?

A:
This heater does not come with a vent kit, but you can purchase one separately. UHXNEGVT11506 for negative pressure venting, or UHXPOSHZ11506 for positive pressure venting.

By Hayward Support

06/24/26

Q: What is the part number to convert to natural gas

A:
HI, to convert a H150FDN to propane you will need a FDXLGCK1150NP manifold kit. This conversion should only be done by a licensed gas service provider. You can find one near you by clicking on the dealer locator tab in the upper right of the homescreen...

By Hayward Support