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Thread: Pool Heater Water Temp

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    GADawgFan's Avatar
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    Pool Heater Water Temp

    Hey everyone....just a quick, general question. I've turned on my heater for the first time and my pool water is about 63 degrees. The temp that shows the pool water after it passes through the heater and SWG shows only 70. Would that indicate that the heater is not heating properly (it's shown 90+ when I ran it last summer) or that the water is so cold that after it passes through the heater it's only increasing it a few degrees and will increase as the pool water temp increases?

    Thanks....David
    New Pool: Pentair Intelliflo VS Pump, Pentair Quad 100 DE filter, Pentair EasyTouch control system, Pentair IC 40 SWG, Pentair Mastertemp 400,000 BTU gas heater, Pentair ScreenLogic wireless interface, Spa, Polaris QT Blower, Polaris 9450 pool cleaner, Gunite w/ Pebble Tec, 10K Gallons
    Old Pool: david-and-kristy-s-pool-build-t8676.html

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    Mod Squad Bama Rambler's Avatar
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    Re: Pool Heater Water Temp

    We really need to know more to even guess whether there's a problem or not. Size of heater, GPM through heater or size of pump and length of piping, size of pool, other equipment.

    A delta temp of 8º might be all that heater is capable of at that temp. Actually, a delta-T of 8º is pretty good.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    GADawgFan's Avatar
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    Re: Pool Heater Water Temp

    Thanks Bama Rambler.....it's a 17,000 gallon pool with a 250,000 BTU NG heater. 1 1/2 HP pump with 2" plumbing that sits about 25 ft' from the pool. Don't know my GPM.
    New Pool: Pentair Intelliflo VS Pump, Pentair Quad 100 DE filter, Pentair EasyTouch control system, Pentair IC 40 SWG, Pentair Mastertemp 400,000 BTU gas heater, Pentair ScreenLogic wireless interface, Spa, Polaris QT Blower, Polaris 9450 pool cleaner, Gunite w/ Pebble Tec, 10K Gallons
    Old Pool: david-and-kristy-s-pool-build-t8676.html

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    Re: Pool Heater Water Temp

    I'd say a seven degree delta is fine. It's not like the water is sitting in there for a while. The water is in and out in about 2 seconds or so. 1 BTU will heat 1 pound of water 1 degree. At 7+ lbs per gallon, it's going to take a while to heat the pool. The pool is your water tank.

    Scott
    Owner of - PoolGuyNJ LLC
    Expert Pool and Spa Repairs, Renovations, and Augmentation. Helping people decide what is the right gear for meeting their needs. Expectations Set, Expectations Met, No Surprises.

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    Re: Pool Heater Water Temp

    Using you specs it will take about 10 hours to raise your pool water from 63 degrees to 80 degrees.
    14,000 gallon IG, Vinyl. Hayward 3/4 hp superpump, Penatair IC40 SWCG, Pentair automation, Hayward sand filter, Aqua Comfort heat pump, Hayward 400k Lo-Nox LP heater.

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    GADawgFan's Avatar
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    Re: Pool Heater Water Temp

    Thanks.....right at 10-11 hours to heat. We're ready for the first swim this season!
    New Pool: Pentair Intelliflo VS Pump, Pentair Quad 100 DE filter, Pentair EasyTouch control system, Pentair IC 40 SWG, Pentair Mastertemp 400,000 BTU gas heater, Pentair ScreenLogic wireless interface, Spa, Polaris QT Blower, Polaris 9450 pool cleaner, Gunite w/ Pebble Tec, 10K Gallons
    Old Pool: david-and-kristy-s-pool-build-t8676.html

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