Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 13 of 13

Thread: Optimum temp for a heated pool

  1. Back To Top    #1

    Optimum temp for a heated pool

    Hello,

    I have just recently gone from owning and operating a 10k gallon above ground pool to moving in a home with a 42k gallon in ground pool and spa. This is the first time I have ever had the ability to enjoy a heated pool!

    I am curious about the optimum temp for a pool that size. I live in Northern California and the temp is averaging 48-52 in the daytime, and drops to about 35 during the night time hours. We had the grand kids for the new year and heated the pool for the first time. Kids will get into 68 degree water without batting an eyelash, so as temp slowly increased so did the use age. We allowed the pool to reach 88 degrees mostly to find out if it was possible. I will admit that is was a luxury to be swimming in water that warm while it was so cold, but this was a special treat.

    My husband has decided that the optimum temp is between 72 and 75 degrees, while I tend to think that is should be between 78 to 82 degrees. What temp do you keep your heated pool at?
    20x45 in-ground 42k pool and spa built in 1989. Just moved into this home and am still in the learning phase of understanding equipment

  2. Back To Top    #2
    banditig's Avatar
    Join Date
    Sep 2015
    Location
    Ohio
    Posts
    464

    Re: Optimum temp for a heated pool

    I like mine above 82, but I have a much smaller pool. And keep a bubble cover on it when not in use.
    15x54 swim & play vinyl metal wall AG
    Hayward S210T sand filter 1.5 HP Pentair Superflo vs
    Rheem raypak 130,000 BTU mv ng
    Jacuzzi 345 whirlpool bath
    TF-100 test kit, HM digital com100 Wanda the Whale

  3. Back To Top    #3
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Location
    Central Minnesota
    Posts
    5,079

    Re: Optimum temp for a heated pool

    I'd have to get another job or take on another spouse to afford to heat my pool that much for any length of time. In the summer, I like the pool in the high 70s, low 80s. If it were air temps where you're at now, even low 70s would feel pretty good.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

  4. Back To Top    #4

    Join Date
    Aug 2014
    Location
    Shallotte, NC
    Posts
    693

    Re: Optimum temp for a heated pool

    Quote Originally Posted by JenniferW View Post

    My husband has decided that the optimum temp is between 72 and 75 degrees, while I tend to think that is should be between 78 to 82 degrees. What temp do you keep your heated pool at?
    Yet another, "How long is a piece of string?, question....

    Seriously, you are both right, but it is a matter of personal taste. We don't have a heater, but my wife and I have very similar opinions.... and feel "opening day" is a few weeks apart..... However, if you do a google search, you will find that most people are in your ballpark, rather than his. If seniors are involved, most printed material will push the temperatures as high as 88. I'm a senior and I'm good at 70 degrees... my wife, also a senior, loves the 91 degree temperatures we can get in mid summer.... I'm done, because it feels like bath water.... headed to the surf.

    You are probably going to have to agree to disagree, to some extent, especially after the first "heating" bill arrives.....

  5. Back To Top    #5
    borjis's Avatar
    Join Date
    Aug 2014
    Location
    Pacific NW
    Posts
    2,058

    Re: Optimum temp for a heated pool

    for me 78 is minimum.

    83 ideal. On a warm day I can step in the pool with no shiver moment at that temp.

    I've had it up to 88 but it felt like bath water.
    16x32 IG Vinyl, 13,000 Gals. Hayward S-244T sand filter, SP2810X15 pump
    (1.5 HP motor) Raypak PR266AEN (266k btu) gas heater. TF-100 Test Kit.
    Dolphin E10 Cleaning Robot.

  6. Back To Top    #6
    Patrick_B's Avatar
    Join Date
    Jun 2011
    Location
    Midland TX
    Posts
    15,001

    Re: Optimum temp for a heated pool

    It's personal, but I can almost assure you having and keeping it warm enough this time of year will mean $$$
    TFP Moderator
    Essential Links:
    ABC's Of Pool Chemistry, Test Kits, SLAM Your Pool
    28K Gal IG FreeForm, CLI Quartz, Pentair 36"SF & VS Pump, Dolphin M5, Rheem

  7. Back To Top    #7

    TFP Guide

    chiefwej's Avatar
    Join Date
    Jun 2011
    Location
    Tucson
    Posts
    2,853

    Re: Optimum temp for a heated pool

    Unless you have an unlimited bank account or win the Powerball jackpot, maintaining 42,000 gallons of water at any temprature 70+ degrees when the outside temps are in the 30's is totally impractical.

    You will soon learn that, (when your gas bill arrives).
    chiefwej
    Tucson, AZ
    16x36 rectangular (19k) Pebble Tec play pool/spa, Pentair Intelliflo VS 011018, Super II 2hp (spa), Aqua Rite T-15 SWG, Pro Grid 60 DE, Hayward H400 & Heliocol Solar heating, A&A infloor system, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit

  8. Back To Top    #8
    Nectarologist's Avatar
    Join Date
    Apr 2015
    Location
    New York
    Posts
    362

    Re: Optimum temp for a heated pool

    Hi. I leave my pool at 84 degrees and if it's cloudy I put it to 86 (based on feedback, i.e., being told to raise it). I don't have a cover but use a liquid solar blanket (not as good but seemed to help hold heat in ok). I live outside NYC and close the pool by October (open in May). Once I'm into end of June through August the heater doesn't work much at all (assuming a hot dry summer like we just had). That's a cool treat for the kids! I assume if you expect it to drop below 32 you just leave the pump running during the night right? My water on the top of the cover won't start to freeze at night until the air temp drops below 30.
    Inground, vinyl liner, 16 x 32 (approx. 21k gallons), roman end w/ bench, 2 Jandy LED lights
    Pump: Jandy Flopro, 1.5 hp Heater: Raypak, 266k btu (P-R266-A-EN-C; nat gas) Filter: Jandy C340 (cartridge filter) Robot: Doheny's Dolphin Discovery

  9. Back To Top    #9
    Isaac-1's Avatar
    Join Date
    May 2010
    Location
    SW Louisiana
    Posts
    6,711

    Re: Optimum temp for a heated pool

    It really is a personal choice, and it does tend to go up with age, back when I was in my 20's I would have said 77 degrees as ideal and would swim in much colder, 6 years ago when I joined this message board I would have said 82 - 83 leaning towards 82, and now I am at 83 close to leaning towards 83-84.
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
    I use and endorse TFtestKits TF-100 from http://tftestkits.net
    ~Remember TFP counts on your donations to keep this site ad free~

  10. Back To Top    #10

    TFP Guide

    Kiss4aFrog's Avatar
    Join Date
    May 2013
    Location
    Hudson, WI
    Posts
    2,602

    Re: Optimum temp for a heated pool

    You just need to find the sweet spot between feels good and affordable.
    '70s IG Vinyl 32K gal, Lazy L, Hayward SuperPump 1.5hp 120V, S240 Sand Filter W/DE
    Solar Blanket, Well Water, Borax Added, TF-100 tester. ? too cold
    1979, 275gal Conway Emerald Spa P-100-2, ES-2 Spa Pack, bromine floater, indoor
    TF-100, Best test kit - TFTestkits.net
    Please help keep the lights on, become a TFP Supporter!

  11. Back To Top    #11

    Join Date
    Sep 2012
    Location
    Pittsburgh
    Posts
    35

    Re: Optimum temp for a heated pool

    I have seen articles that say competitive swimming should be at 78. Recreational for me is 82 to 84.

  12. Back To Top    #12
    needsajet's Avatar
    Join Date
    Jan 2016
    Location
    Sydney, NSW, Australia
    Posts
    3,556

    Re: Optimum temp for a heated pool

    My wife likes 86 and I like 82. At 86 it doesn't cool me off on a hot day, but I could float around in it forever. If it's sunny out, I'll jump in without hesitation at anything over 75.
    12k IG salt; glass beads in plaster; K-2006C, K-1766, CCL, and Aussie 4in1 (HTH); Pentair Eco800 1.2HP VS; Zodiac SWC 1.3 lb/day (25 g/hr); 25" filter recycled glass; OKU solar panels; 1/2 HP solar pump; Rebel (Warrior) pool cleaner; FlowViz; prior pool AG 10k | Read Before Posting to get the best possible advice | ... and this helped me a lot!: TFPC for Beginners

  13. Back To Top    #13

    Join Date
    Sep 2014
    Location
    Hamilton, Canada
    Posts
    70

    Re: Optimum temp for a heated pool

    We have much colder winters (below freezing), but our winter started very late.
    So in the late fall and wintertime, I've run mine as hot as 100F, running the pool as a 20,000 gallon hot tub.

    Last season (2014) we ran into early December but this year we ran our swimming pool (Hamilton, Ontario, Canada) until January 11th.

    Our process was to usually let the pool cool down to 70 during the week, turn on the heater on Friday and run the heater for approximately 24 hours, to bring it up to hottub temperatures. Rinse and repeat every weekend, gives 8 nights of hottub temperatures. We've thrown many neighborhood barbecues.

    Last month's natural heating bill was only $211, because of techniques I've come up with. I'll post in a new thread explaining how I managed to keep my bill low, while running my swimming pool into the beginning of winter (although winter came rather late this year!)... I used a tactic of turning off the poolpump everytime I turned off the heater (prevents pipe cooling effect), and using a solar thermal blanket whenever the pool was not in use. Often, the pool fell only 5 degrees by the time I turned the heater back on the next day. I avoid thermostat cycling (inefficient, due to ground pipe cooling effect, when heater cycles off, the water sometimes gets colder than the water in the pool, given uninsulated plumbing through the ground), and instead run the pool full-throttle heating instaed. Totalled, all these techniques allowed me to save maybe ~70%, and allows me to run the pool as one giant hottub during the late fall and early winter.

    EDIT, I've posted the thread:
    FAQ: Cheaply Keeping a Pool Hot -- 90F/95F/100F -- How we ran till Jan 11th in Canada

    When the ambient air above the pool is near or below freezing, it is nice and toasty at 95F feeling like a hot tub.

    In the summer, we run at 70-85F.
    Became homeowners/poolowners in 2014 -- Now Resident Experts In Cheaply Hot-Tubbing (95F) A Large 20,000 Gallon Pool.
    20,000 gallon concrete/vinyl, 32'x16' size, Raypak Digital 266 Heater, Hayward Tristar VS pump

Posting Permissions

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