Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 12 of 12

Thread: Most efficient way to heat pool natural gas?

  1. Back To Top    #1

    Join Date
    Apr 2017
    Location
    Moab
    Posts
    3

    Most efficient way to heat pool natural gas?

    Hello All,

    I will add pool equipment info to sig soon. I have a quick question. I have an indoor fiberglass leisure reflection IG pool. Hayward 250K BTU pool heater automatic cover and high dollar dehumidifier (not fully fired yet waiting on manufacturer). We have the pump on a timer so the heater/ pump are not running from 9 PM to 8 AM. We have the heat set to 86. Is it better to leave the heater/ pump running or keep it on the timer as far as my heating bill would go? On the timer obviously it's not running for 11 hours but during that time heat goes down a bit. When it starts up has to reheat. I live in Moab, UT, wide range of temps, from 0 degrees in the winter to over 100 in the summer. Sorry for lack of explanation in my question but I think you know what I am asking.

    pool.jpg

  2. Back To Top    #2
    elwood58's Avatar
    Join Date
    May 2012
    Location
    Sun City West Arizona (2nd Home)
    Posts
    656

    Re: Most efficient way to heat pool natural gas?

    I would think with Natural Gas that you are probably on the right track, so long as you are closing the cover overnight. If you were using a Heat Pump, it would be a different story, as the heat gain seems to be 1 degree per hour, so catch up time would be long each day.
    19204 Gallon L Shape with a 10X10 2nd Step Baja Ledge. Intellichlor IC-40, IntellipH, Cartridge Filter, Pentair Heater/Chiller (Heat Pump). Tons of Deck with Deck Jets. Construction Complete 6/5/17.

    "If you don't measure it, you can't manage it!"

  3. Back To Top    #3

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,950

    Re: Most efficient way to heat pool natural gas?

    I agree with elwood......probably.

    If the pool experiences long, vacant periods with no swimmers, gas is probably best. If you will be in the pool 3 times weekly or even more, then a heat pump might be your best bet. Either way, there are so many variables you cannot calculate it as precisely as you might like so just base your choice on how you use your nice pool.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  4. Back To Top    #4

    In the Industry

    Join Date
    Nov 2011
    Location
    Moberly,MO
    Posts
    1,025

    Re: Most efficient way to heat pool natural gas?

    Sorry to burst the bubble. You won't be able to put a heat pump on an indoor pool. Gas is the best way to heat an indoor pool. Do away with the timer get a superflo vs pump or something similar, set the lowest rpm you can to run the heater and let it run at that speed for maybe 20 hours a day then for 4 hours a day speed it up a little.
    Over 30 years in the pool business
    We build vinyl, fiberglass, stainless steel pools
    Certified in Hydraulics

  5. Back To Top    #5

    Join Date
    May 2016
    Location
    West Bloomfield, MI
    Posts
    757

    Re: Most efficient way to heat pool natural gas?

    I read this differently guys. I don't think bripenn is asking about a heat pump at all. He has his heater and his pool pump on the same timer. It sounds to me like this is a discussion about pumping and heating schedules, heat loss and time to heat etc. as it all relates to efficiency.
    12,000 gal Diamond Brite indoor​ pool. Pentair Triton TR-60 Sand Filter +added DE, Lochinvar Energyrite ERN-200 gas heater, Pentair Multi-valve, Pentair SuperFlo VS pump, TF-100 kit, Pool Math App - iOS

  6. Back To Top    #6
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    24,974

    Re: Most efficient way to heat pool natural gas?

    Swampy has done some pretty extensive analysis on heating efficiently with gas here, Anyone Have a Winter Pool Dome - Ameridome or Others?
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  7. Back To Top    #7

    Join Date
    Apr 2017
    Location
    Moab
    Posts
    3

    Re: Most efficient way to heat pool natural gas?

    Correct, from the research I did heat pump wasn't an option especially for the climate I am in and wanting a heated pool year round. Pumping and heating schedules is what I was after. Thanks, looks like I will have to do some research on the super-flo.

  8. Back To Top    #8
    elwood58's Avatar
    Join Date
    May 2012
    Location
    Sun City West Arizona (2nd Home)
    Posts
    656

    Re: Most efficient way to heat pool natural gas?

    Quote Originally Posted by swimcmp View Post
    Sorry to burst the bubble. You won't be able to put a heat pump on an indoor pool. Gas is the best way to heat an indoor pool. Do away with the timer get a superflo vs pump or something similar, set the lowest rpm you can to run the heater and let it run at that speed for maybe 20 hours a day then for 4 hours a day speed it up a little.
    I was not assuming a Heat Pump be installed indoors. It would have to sit outside.
    19204 Gallon L Shape with a 10X10 2nd Step Baja Ledge. Intellichlor IC-40, IntellipH, Cartridge Filter, Pentair Heater/Chiller (Heat Pump). Tons of Deck with Deck Jets. Construction Complete 6/5/17.

    "If you don't measure it, you can't manage it!"

  9. Back To Top    #9

    Join Date
    May 2016
    Location
    West Bloomfield, MI
    Posts
    757

    Re: Most efficient way to heat pool natural gas?

    I allow my pool to cool down during periods on non-use. (if I plan to be out of town for a wkd etc) I know the case has been made that cycling too often can be inefficient, but I schedule it carefully and indoor pools have the double hit of moisture mitigation, which is much higher when the water is warmed. I recently replaced my old single-speed pump with a SuperFlo. No regrets, but that introduced the possibility that the pump could cycle off while the heater has power. If the pressure switch fails, then so will my heater.

    I'm still experimenting with speeds, duration and heat... When I want to bring the pool from cold to warm, I run the SuperFlo at 2800 RPM and set the timer for 24 hours. I make a point to shut the heater off at that point and control it manually to maintain heat.

    2800 is a guess. The slower the speed, the more often my heater cycles off. At 3450 (top speed, same as the old pump), it's loud and consuming a LOT of power.
    12,000 gal Diamond Brite indoor​ pool. Pentair Triton TR-60 Sand Filter +added DE, Lochinvar Energyrite ERN-200 gas heater, Pentair Multi-valve, Pentair SuperFlo VS pump, TF-100 kit, Pool Math App - iOS

  10. Back To Top    #10


    Join Date
    Nov 2015
    Location
    Carrollton tx
    Posts
    487

    Re: Most efficient way to heat pool natural gas?

    Quote Originally Posted by Rollercoastr View Post
    I allow my pool to cool down during periods on non-use. (if I plan to be out of town for a wkd etc) I know the case has been made that cycling too often can be inefficient, but I schedule it carefully and indoor pools have the double hit of moisture mitigation, which is much higher when the water is warmed. I recently replaced my old single-speed pump with a SuperFlo. No regrets, but that introduced the possibility that the pump could cycle off while the heater has power. If the pressure switch fails, then so will my heater.

    I'm still experimenting with speeds, duration and heat... When I want to bring the pool from cold to warm, I run the SuperFlo at 2800 RPM and set the timer for 24 hours. I make a point to shut the heater off at that point and control it manually to maintain heat.

    2800 is a guess. The slower the speed, the more often my heater cycles off. At 3450 (top speed, same as the old pump), it's loud and consuming a LOT of power.
    Seems odd that your heater cycles off more often at lower pump speeds ... Unless the heated water doesnt mix as well in the pool when at low speed. And the intakes are near a heated return that is sensing JUST heated water.
    I would think that about 1500 rpm would be plenty of water to use the heater and low enough RPM to keep noise and cost down ...
    Doug - Purchased 1/2016, 1995 house with 16x31 ft, ~23000 gallon Gunite pool w 11x7 spa, 3 Pentair VS pumps, a boost pump for polaris 3900 and a BaduŽ Jet super-sport swim jet pump, 1.5 hp blower, a CL460 Cartridge filter. TF-100 test kit. Aquapure 1400 SWG, iAqualink - Lots to learn. New Aquabright, Jandy LEDs, CMP LED Sheers.

  11. Back To Top    #11

    Join Date
    May 2016
    Location
    West Bloomfield, MI
    Posts
    757

    Re: Most efficient way to heat pool natural gas?

    Quote Originally Posted by Silver_2000 View Post
    Seems odd that your heater cycles off more often at lower pump speeds ...
    Sorry, I should've said the thermostat cycles. The pressure switch won't even shut down the heater at 1,100 RPM.
    12,000 gal Diamond Brite indoor​ pool. Pentair Triton TR-60 Sand Filter +added DE, Lochinvar Energyrite ERN-200 gas heater, Pentair Multi-valve, Pentair SuperFlo VS pump, TF-100 kit, Pool Math App - iOS

  12. Back To Top    #12

    Join Date
    Apr 2017
    Location
    Moab
    Posts
    3

    Re: Most efficient way to heat pool natural gas?

    Quote Originally Posted by elwood58 View Post
    I was not assuming a Heat Pump be installed indoors. It would have to sit outside.
    In my case with my climate a heat pump in not an option correct? Moab, UT. Winters in the 20s and 30s sometimes much lower.
    Leisure Reflection 30 Fiberglass, 10,000 gallons plus indoor pool, 1.5 HP Hayward Super Pump, 25K Salt System, 325K Cartridge Filter, Auto Cover, Pool Pump Timer. Top Notch Dehumidifier (don't have the specs in front of me).

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •