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Thread: Is my heat pump big enough?

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    Join Date
    Nov 2015
    Location
    Lawrence, KS
    Posts
    64

    Is my heat pump big enough?

    We are building 20x40 inground vinyl liner, 30,000 gallons, and are equipping it with a Pentair 125,000 BTU heat/cool pump. We hope to use the pool from May thru October in Kansas. I wanted to make sure the heat pump was big enough to heat the pool to 85-88 degrees on a regular basis. Any thoughts or feedback are greatly appreciated.

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    mas985's Avatar
    Join Date
    May 2007
    Location
    Pleasanton, CA
    Posts
    11,482

    Re: Is my heat pump big enough?

    The heat pump will raise the water temperature about 0.5 degree per hour. So on demand heating will take quite awhile but if you run the heater every day, then it should be able keep up with the heat loss. It just might cost you a fortune though.
    Mark
    Hydraulics 101; Pump Ed 101; Pump/Pool Spreadsheets; Pump Run Time Study; DIY Acid Dosing; DIY Cover Roller
    18'x36' 20k plaster, MaxFlo SP2303VSP, Aqualogic PS8 SWCG, 420 sq-ft Cartridge, Solar, 6 jet spa, 1 HP jet pump, 400k BTU NG Heater

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    JoyfulNoise's Avatar
    Join Date
    May 2015
    Location
    Tucson, AZ
    Posts
    11,588

    Re: Is my heat pump big enough?

    A good solar cover (bubble type) will help you a lot. An opaque auto-cover would be good too but that adds a lot of cost to a pool build. As with any type of heating method (gas or heat pump), evaporative heat loss is the biggest driver of how well you can maintain a particular water temperature.


    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

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    Re: Is my heat pump big enough?

    Do you have natural gas available?

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