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Thread: Cost to Heat Pool

  1. Back To Top    #1

    Join Date
    Jun 2011
    Location
    Frisco, Texas
    Posts
    70

    Cost to Heat Pool

    Is there a way that I can get a rough idea on what it would cost me to heat my pool using a gas heater? This is a new pool that will be complete by Feb 15th. I know that I can't use the heater for about 30 days. But, would consider heating it over spring break - if it doesn't cost a fortune. I don't know what the pool water temperate will be yet - but is there a simple forumula that shows the cost to heat 1degree, etc?

    I have a 23,000 gallon pool and would like to know how much it costs to heat?

    I appreciate any thoughts and/or suggestions.
    33'x21' In-ground (23,000 gal) - 8' spa raised 18" with 8 jets | Filtration Jandy DE 60 | Sanitation Aquapure 1400 SWG | Pumps Intelliflo VS+SVRS 3.0HP & Jandy 1.5HP stealth water feature pump | Heating Jandy LRZ400 | Lighting Jandy LED Spa (1)/Pool (2) | Coping Tennessee Crab Orchard & Moss Rock | Finish pebble sheen type (riversand) Tahoe Blue

  2. Back To Top    #2

    Re: Cost to Heat Pool

    You will see a noticeable difference if you cover it overnight, that will be the best way to keep your heating costs lower. Maintaining is much easier than re-heating, but the cost is unknown since it's entirely dependent on the weather.

    here is a formula that I saw in another thread.
    Quote Originally Posted by yeggim
    8.34 BTUs to heat one gallon of water 1 degree
    10000 X 8.34=83,400 BTUs to raise your pool 1 degree
    10 degrees rise = 834,000 BTUs
    The missing variables would be the efficiency of your heater (I think most are 80%) and the cost of your gas per therm.

    I remember reading that 1 therm = 100k BTUs


    In my case it would be this:
    14000 * 8.34 = 116760 BTUs per degree
    116,760/100,000 = 1.1676 * [s:1btbfdtu]1.3[/s:1btbfdtu] 0.83 = [s:1btbfdtu]$1.52[/s:1btbfdtu] $0.97
    (I think my gas cost is [s:1btbfdtu]$1.3[/s:1btbfdtu]/therm, I would have to double check) - good thing I was wrong, it's $0.97/therm

    now the biggest question would be, how many degrees per day on average.

    I will have to come back and check this again when I'm deciding how early to open the pool
    Aaron
    [ Vogue Vectra 24' AG | Hard plumb: Hayward Power-Flo Matrix 1HP 2-speed, 27" sand filter & Pentair MiniMax 100 NG | Taylor K-2006 | Central IL ]
    Powered by: TFP, PoolMath & TFTestkits

  3. Back To Top    #3

    Re: Cost to Heat Pool

    For your pool, it would take 191,820 Btu to raise the temperature 1 degree Fahrenheit. If we assume $10.00 per million Btu ($1.00 per Therm) and an 83 % efficient heater, then the cost to raise the pool temperature by 1 degree F would be $2.31.

    Then, you have to consider the amount of heat lost, which will vary depending on variables such as whether the pool is covered, water temperature, ambient air temperature, wind speed etc.

  4. Back To Top    #4

    In the Industry

    Join Date
    Nov 2011
    Location
    Moberly,MO
    Posts
    978

    Re: Cost to Heat Pool

    You will gain some efficiency with the intelliflo running at a flow that is just maybe 1 to 2 gpm more than what it takes to activate saftey switches on the heater.
    Over 30 years in the pool business
    We build vinyl, fiberglass, stainless steel pools
    Certified in Hydraulics

  5. Back To Top    #5

    In the Industry

    Join Date
    Mar 2011
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    441

    Re: Cost to Heat Pool

    http://aquacal.com/sizing.html

    This should do what you need it to.
    20X40 30,000 gallon gunite pool

  6. Back To Top    #6

    Join Date
    Aug 2011
    Location
    North Fort Worth, TX
    Posts
    131

    Re: Cost to Heat Pool

    msujohn ~ did you end up heating the pool? My daughter wants a pool party for her birthday next weekend and I am contemplating heating the pool. Yesterday it was 82 outside and the pool was 65. I don't know what the weather will be next Saturday so I'm not sure how long it would take to heat the pool to get it ~80 for the party?! Any ideas?! Was your gas bill crazy high?!
    Built in 2011, 23x34' IG freeform play pool (18,850 gallon) ~ 7' spa raised 18" with 5 jets, 3 tier fountain and 5 tier cascading waterfall into pool ~ IntelliChlor SCG ~ Pentair Intelligent VS-3050 variable speed pump ~ Clean and Clear 420 cartridge filter ~ Easy touch controller ~ Blue Granite Pebble Sheen ~ Intellibrite LEDs ~ Turbo twister slide ~ 8x8 flagstone tanning ledge with umbrella sleeve and bubbler ~ In-pool flagstone table with umbrella sleeve ~ 997 sq ft exposed aggregate decking Our pool build

  7. Back To Top    #7

    Join Date
    Jun 2011
    Location
    Frisco, Texas
    Posts
    70

    Re: Cost to Heat Pool

    We did not heat the pool. Just have been thinking about it. If you do it keep me informed of the time and cost.
    33'x21' In-ground (23,000 gal) - 8' spa raised 18" with 8 jets | Filtration Jandy DE 60 | Sanitation Aquapure 1400 SWG | Pumps Intelliflo VS+SVRS 3.0HP & Jandy 1.5HP stealth water feature pump | Heating Jandy LRZ400 | Lighting Jandy LED Spa (1)/Pool (2) | Coping Tennessee Crab Orchard & Moss Rock | Finish pebble sheen type (riversand) Tahoe Blue

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