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Thread: Installing a Jandy Natural Gas heater in a garage....

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    Installing a Jandy Natural Gas heater in a garage....

    Curious,
    Why is it necessary to elevate the heater 18" if it is enclosed in a garage?

    TIA

    PF

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    Richard320's Avatar
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    Re: Installing a Jandy Natural Gas heater in a garage....

    Quote Originally Posted by Pool_Fool View Post
    Curious,
    Why is it necessary to elevate the heater 18" if it is enclosed in a garage?

    TIA

    PF
    In the event of a flammable fumes (Think leaking gas can or paint thinner), the ignitor/pilot will be above the pooled fuel and the house hopefully won't go up with a bang. Your household water heater is probably sitting on a platform for the same reason.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Installing a Jandy Natural Gas heater in a garage....

    Quote Originally Posted by Pool_Fool View Post
    Curious,
    Why is it necessary to elevate the heater 18" if it is enclosed in a garage?

    TIA

    PF
    Make sure you have proper ventilation and carbon monoxide detectors in the house/garage
    Gunite Pool/Spa, CLI Caribbean blue crystal stone smooth, Pentair 3hp Intellifo VS, Pentair Quad DE Filter, Pentair 400k BTU Heater, KK Prowler 820, Pentair PSL4 controler with Screenlogic wifi, Inline Chlorinator, Pentair 1.5hp Spa Blower, TF-100 Test Kit w/ Speed Stir. My 2016 Pool Build

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    Re: Installing a Jandy Natural Gas heater in a garage....

    Because it is a potential ignition source for gasoline or other flammable liquids or vapors that could potentially be near the ground.

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    Re: Installing a Jandy Natural Gas heater in a garage....

    There is a 12" inch hole directly above it for air to come in(old vent hole from an old heater), and we are thinking of venting it horizontally directly through the outer wall.

    Does that sound like a decent amount of air flow?

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    Richard320's Avatar
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    Re: Installing a Jandy Natural Gas heater in a garage....

    Quote Originally Posted by Pool_Fool View Post
    There is a 12" inch hole directly above it for air to come in(old vent hole from an old heater), and we are thinking of venting it horizontally directly through the outer wall.

    Does that sound like a decent amount of air flow?
    The heater manual and the local building code get the final say on that.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Installing a Jandy Natural Gas heater in a garage....

    Richard nailed it. Ignition sources in basements and garages have forced several code changes over the years. Take gas water heaters for example. They now have to have all sorts of explosion proof safeties on them that have more than doubled the cost of conventional heaters. Garages are a particular problem as people don't realize how much flammable stuff they store in them. Gas cans, paint thinner, cars, lawnmowers, etc. These all can be potential flammable vapor sources.

    You need to verify if the heater you are purchasing is rated to be installed in an enclosure. some are only rated to be installed outdoors. as far as venting goes, you need to look at both exhaust and intake. an improperly exhausted unit can damage it not to mention fill the room with CO
    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: Installing a Jandy Natural Gas heater in a garage....

    Quote Originally Posted by Richard320 View Post
    The heater manual and the local building code get the final say on that.
    The manual has a nice drawing of how to pipe in proper supply air to the heater as well as spatial requirements.
    Gunite Pool/Spa, CLI Caribbean blue crystal stone smooth, Pentair 3hp Intellifo VS, Pentair Quad DE Filter, Pentair 400k BTU Heater, KK Prowler 820, Pentair PSL4 controler with Screenlogic wifi, Inline Chlorinator, Pentair 1.5hp Spa Blower, TF-100 Test Kit w/ Speed Stir. My 2016 Pool Build

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