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  1. #1
    Join Date
    Mar 2007
    Location
    Philadelphia PA
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    3,177

    Default combustion air for power vented WH

    New construction today - had a high efficiency gas water heater in a small closet. It power vented through the roof. There was only one vent for combustion air, up above the door.
    There has to be a second vent down by the floor, right? The fact that the WH is power vented has no bearing on this requirement?

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    "There is no exception to the rule that every rule has an exception." -James Thurber, writer and cartoonist (1894-1961)
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  2. #2
    Join Date
    Mar 2007
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    Philadelphia PA
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    Default Re: combustion air for power vented WH

    Here's a pic

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  3. #3
    Ray Norton's Avatar
    Ray Norton Guest

    Default Re: combustion air for power vented WH

    Right you are. If combustion air is not piped in the high/ low vents are required.


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