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The Hayward W3H135FDP is a 135,000 BTU gas pool heater built for above ground pools and spas. It uses a cupro nickel heat exchanger, which resists corrosion from unbalanced water better than standard copper. The electronic control panel is simple to set, and Hayward rates the hydraulics among the best in its class for fast heat-up. The best new price is $2,399.00 at eBay as of November 7, 2026, with 5 stores listing it new.
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Lowest price we've seen: $2,399.00 on Nov 7 at Poolzilla. Tracked across 12 stores since Nov 7.
Owners of Hayward H-Series heaters generally report fast heat-up and reliable service over several seasons. Complaints tend to focus on installation cost and on units that failed early when water chemistry was neglected.
Hayward H-Series heater for above ground pools and spas combines reliable technology with ease of operation and superior performance. H-Series heaters boast industry-leading hydraulic performance coupled with a 135,000 BTU rating for faster speed-to-heat capability. Their intuitive electronic panel is also quick and easy to operate, so pool owners can spend less time messing with controls and more time relaxing in the water. Built with a durable cupro nickel heat exchanger as standard, H-Series heaters offer exceptional protection against corrosion and premature failure caused by unbalanced water chemistry, ensuring you get season after season of premium heating performance.