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Thread: Pool Heater Condensation

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    Pool Heater Condensation

    Just opened today and the water temp after fill is 49. Lit the heater and it caught on the first try. I notice some water dripping from the base of the heater. Is this normal when the water is so cold?
    16 X 32 Vinyl. Hayward aqua rite salt system, T -15 cell. Hayward H250 gas heater, Hayward 1HP superpump.

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    JasonLion's Avatar
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    Re: Pool Heater Condensation

    Yes, that is normal when the water is very cold. You don't want that to happen too often. if you run the heater when there is a lot of condensation enough times it may eventually damage the heater.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Pool Heater Condensation

    Quote Originally Posted by JasonLion View Post
    Yes, that is normal when the water is very cold. You don't want that to happen too often. if you run the heater when there is a lot of condensation enough times it may eventually damage the heater.
    It only happens in the spring when I open. It will last for several hours though till the water is warm enough. Is that enough to screw up the heater?
    16 X 32 Vinyl. Hayward aqua rite salt system, T -15 cell. Hayward H250 gas heater, Hayward 1HP superpump.

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    JasonLion's Avatar
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    Re: Pool Heater Condensation

    No, once a year shouldn't be a problem.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: Pool Heater Condensation

    Quote Originally Posted by JasonLion View Post
    No, once a year shouldn't be a problem.
    Is there anything that can be done to avoid it?
    16 X 32 Vinyl. Hayward aqua rite salt system, T -15 cell. Hayward H250 gas heater, Hayward 1HP superpump.

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    JasonLion's Avatar
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    Re: Pool Heater Condensation

    The only way to avoid it is to never run the heater when the water is that cold. However, that isn't always practical.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    Re: Pool Heater Condensation

    Quote Originally Posted by JasonLion View Post
    The only way to avoid it is to never run the heater when the water is that cold. However, that isn't always practical.
    Thanks for the info. I appreciate it.
    16 X 32 Vinyl. Hayward aqua rite salt system, T -15 cell. Hayward H250 gas heater, Hayward 1HP superpump.

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    TFP Guide

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    Re: Pool Heater Condensation

    What you are experiencing is the fact that burned natural Gas has an enormous amount of water vapor as a byproduct of the combustion. When this water vapor comes into contact with the cold surface of the heat exchanger, it condenses out and forms water droplets. This is akin to the dew point you hear so much about on the weather channel. In a pool heater running natural gas, the condensation point is around 150 deg f. Once the exhaust gas lowers to that temp it will condensate. One of the problems that can occur is the water will collect the fine soot particles from the combustion process and start to clog up the heat exchanger. In the north we have this problem with home heating boilers if they are not set up properly.
    Unknown make 18' above ground (bought used in 1999) Sparco sand filter. Hayward 100,000 BTu heater. 2 speed pump

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    Re: Pool Heater Condensation

    You can also bypass some of the water past the heater and thus the heater has a better chance of heating up what water does go thru the heater. When you start the heater up and you hear the sizzling of the water dripping, open the manual bypass, if you have one built into the pool plumbing of the heater, and the condensation stops. So if you have this issue and no manual bypass built intot he pool plumbing of the heater, add it and see how it then acts.

    Your mileage may vary......LOL
    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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