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Thread: Pool Water Evaporation Rates

  1. Back To Top    #1

    Join Date
    Mar 2007
    San Rafael, CA USA

    Pool Water Evaporation Rates

    This WaterEvaporation spreadsheet will calculate the evaporation rate given air and water temperature, relative humidity, and wind. Note that this is the wind speed at the surface of the water which is usually quite a bit lower than general wind speed due to fences and the water being somewhat below ground level.

    This post shows some of the relative effects for these different parameters where wind speed is the most important.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

  2. Back To Top    #2
    JoyfulNoise's Avatar
    Join Date
    May 2015
    Tucson, AZ

    Re: Water Evaporation Rates

    This is great! Thank you for posting this.

    Sent from my iPhone using Tapatalk
    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, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

  3. Back To Top    #3

    Join Date
    Jul 2015
    South Africa

    Re: Pool Water Evaporation Rates

    Thanks for sharing Chem Geek
    +- 45000 Litre IG, Fibre Glass Pool.
    1 HP Pump, some sort of Sand Filter.
    Sunny South Africa

  4. Back To Top    #4
    stev32k's Avatar
    Join Date
    Mar 2009
    Mobile, Alabama

    Re: Pool Water Evaporation Rates

    Thanks for posting that spreadsheet. It agrees very well with my actual measurements.
    20' x 40' IG with vinyl liner volume approx. 35,000 gal.1.5 H.P. main pump, Polaris 280 cleaner W/ 3/4 H.P. booster pump
    Hayward sand filter, 3.14 sq ft, 62 gpm. Stenner 45 MPH10 chlorine feed pump. 1 micron final filter bags (home made and very effective)

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