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Thread: Pool heater question Re how fast to heat?

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    FirstVallartaPool's Avatar
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    Apr 2016
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    Puerto Vallarta mexico
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    Pool heater question Re how fast to heat?

    Was wondering as i still haven't figured out roughly how fast will our heater warm our pool if outside temp is 80?
    Heat siphon specs:
    Model SX3.25HP 208/230 60 . 80,000 btu

    Pool approximately 3800 gallons

    Thanks all!
    Pool 3800 gaĺlon glass tiled concrete approximately 10 years old/ Puerto Vallarta
    Hayward sand filter S166t.
    Pool Pump Silver10/1115 1hp
    Heat siphon Sx3.25hp
    Hard Municipal Water tf-100 test kit

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    Mod Squad pooldv's Avatar
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    Re: Pool heater question Re how fast to heat?

    1 btu raises 1 lb of water 1 degree f in an hour.

    3800 8.34lbs = 31,692 lbs 80,000 = 0.4 hours or 24 minutes for 1 degree temp rise. Assuming 100% efficiency and no loss. So, maybe assume 30 minutes per degree f.
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    FirstVallartaPool's Avatar
    Join Date
    Apr 2016
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    Puerto Vallarta mexico
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    Re: Pool heater question Re how fast to heat?

    Excellent thanks! That's pretty fast as i plan on running filter for about 3 hours a day in December when heater is on....that should be perfect. Right now 2 hours is working fine to filter pool only per day. December temps are roughly 77f days and 19f nights.
    Pool 3800 gaĺlon glass tiled concrete approximately 10 years old/ Puerto Vallarta
    Hayward sand filter S166t.
    Pool Pump Silver10/1115 1hp
    Heat siphon Sx3.25hp
    Hard Municipal Water tf-100 test kit

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