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Thread: Heater Recomendation

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    Heater Recomendation

    Hello and welcome to my first post.

    I own a pool spa combo. I heat the pool with a solar heater and am very happy with doing so. The spa on the other hand is in need of a new heater. The heater i currently have is a gas guzzling dinosaur that is on its last legs. Its large enough to heat the pool and then some. I am looking to replace it but with something much smaller, because i am only interested in heating the spa with it. Is this something that is commonly done and if so a little guidance in the right direction and a suggestion on an actual unit would be much appreciated. The spa is approximately 500 gallons. Thanks for any help you guys can give me.
    16k, IG Plaster, 3 Hp Intelliflow Variable Speed, 420 sf Cartridge Filter, 1977, Pentair Legend Pool Cleaner, Attached Spa, Some crappy Teledyne Larrs Dinosaur Heater

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    Mod Squad jblizzle's Avatar
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    Re: Heater Recomendation

    Welcome to TFP!!!

    Actually the heater size does not really affect the cost to heat and maintain the water, it only affects the speed at which this happens.
    For example:
    A 400k BTU heater may heat the spa up to temp in 1 hour
    A 250k BTU heater would heat the spa in 1.6 hours
    But, both would use a very similar amount of gas to accomplish the same job.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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    Isaac-1's Avatar
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    Re: Heater Recomendation

    It would help if you tell us where your located, how your gas rates compare to your electric rates, etc.
    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
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    Re: Heater Recomendation

    Hey Thanks for the info Jblizzle I appreciate it.

    Sure Thing Isaac. I live in the San Francisco bay area of Northern California. Im not quite sure how these compare but I Pay on average about $1.20 a Therm for gas and $0.14 a Kilowatt hour for Electrical. The amount of my gas bill tends to be about double my electric bill in the winter but we are running the furnace constantly because of our sad single pane aluminum windows. I hope this is the info you are looking for.
    16k, IG Plaster, 3 Hp Intelliflow Variable Speed, 420 sf Cartridge Filter, 1977, Pentair Legend Pool Cleaner, Attached Spa, Some crappy Teledyne Larrs Dinosaur Heater

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    Re: Heater Recomendation

    We use the Hayward Heatpro 21104T. It works great except Hayward replaced it last year under warranty because of a bad condensor. So far no issues since then. It cost us during the pool install 3K to put it in.
    16.6 x 32.6 Vinyl Liner Grecian, Aqua Rite Plus SWG, Hayward HeatPro 110K BTU, Pentair VRS, LED Laminar and Interfab Waterfall.

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    Re: Heater Recomendation

    Thanks for the suggestion Newbie. About how long would you say it takes for your spa to heat up. Someone told me that heat pumps were not the way to go in my area because of our lack of humidity. It didn't make a huge amount of sense at the time but that's what I heard. The thought of using electricity instead of gas to heat the spa is very appealing I must say.
    16k, IG Plaster, 3 Hp Intelliflow Variable Speed, 420 sf Cartridge Filter, 1977, Pentair Legend Pool Cleaner, Attached Spa, Some crappy Teledyne Larrs Dinosaur Heater

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    Mod Squad jblizzle's Avatar
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    Re: Heater Recomendation

    Quote Originally Posted by Ross P
    The thought of using electricity instead of gas to heat the spa is very appealing I must say.
    Really? Generally natural gas is cheaper and faster.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
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    Re: Heater Recomendation

    First off gas is really the way to go to heat a spa. Especially if you want to heat it during cooler weather or during the night time hours. Electric heat pumps are great for bodies of water that don't require quick heat ups and when you have outside temps that are fairly warm to begin with. Remember, electric heat pumps draw in the outside warmth to help generate heat. No warm/hot weather outside, no/little warm generated by electric heater.

    With a 400K BTU heater you should be able to heat your spa up rather quickly. Usually you can get close to 4 degrees about every 1.5 minutes or there about. A 250K BTU heater you will get about about 2 degrees in that 1.5 minute.

    Rates for gas aren't going to be an issue if you want to use your spa. Gas is the only solution to heating a body of water in a relatively quick amount of time.
    Paul
    http://www.gastekservices.com A word of caution: When working with gas and electrical you might want to consider a licensed contractor. Consider the value of your life and others around you. If you would like to provide a review of the help I provided, please use the following link to leave a review. gastek - Google Search,

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    Re: Heater Recomendation

    Thanks a lot Paul the info is much appreciated. I am fully willing to do all of the plumbing on the solar heater but I agree with you on hiring out the gas heater installation.
    16k, IG Plaster, 3 Hp Intelliflow Variable Speed, 420 sf Cartridge Filter, 1977, Pentair Legend Pool Cleaner, Attached Spa, Some crappy Teledyne Larrs Dinosaur Heater

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