Hayward Universal H-Series 400K BTU Natural Gas Pool Heater – W3H400FDN. It was delivered a month and a half ago, has been unboxed, but is unused. Given a 20,000 gallon pool, it will raise the water temperature 1 °F every 25 minutes.
Hayward Universal H-Series 400K BTU Natural Gas Pool Heater – W3H400FDN. It was delivered a month and a half ago, has been unboxed, but is unused. Given a 20,000 gallon pool, it will raise the water temperature 1 °F every 25 minutes.
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