Hayward H-Series Propane Gas Heater, 135K BTU, 120/240 V, 60 Hz, Single Phase | W3H135FDP

The Hayward W3H135FDP is a 135,000 BTU Hayward gas pool heater in the H-Series line, running on liquid propane with electronic ignition. This residential in-ground unit uses a cupro-nickel heat exchanger, a corrosion-resistant alloy that distinguishes it from standard copper-core models in the same category.

The W3H135FDP operates on LP gas, so confirm your fuel supply before ordering — this heater is not convertible to natural gas. Electronic ignition eliminates the need for a continuous standing pilot light, meaning the unit only fires when there is a heat call.

Hayward's H-Series is a well-established platform in the residential heater market. The cupro-nickel exchanger is the primary differentiator at this price point, separating it from lower-cost copper exchanger versions. Unit price is $2,239. Fuel type is propane only.