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  1. #1
    Walker Haglock's Avatar
    Walker Haglock Guest

    Default Direct vent flue location

    What do you make of a direct vent PVC flue routed out the side of the home, but located inside of the cold air return? I wrote it up for several reasons, but mainly as a safety hazard. If that PVC joint hidden inside the cold air ever gets compromised, the carbon monoxide and other hot gases go right back into the system for re-distribution throughout the home.

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  2. #2
    Join Date
    Mar 2007
    Location
    Philadelphia PA
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    3,177

    Default Re: Direct vent flue location

    "There is no exception to the rule that every rule has an exception." -James Thurber, writer and cartoonist (1894-1961)
    www.ArnoldHomeInspections.com

  3. #3
    Garry Blankenship's Avatar
    Garry Blankenship Guest

    Default Re: Direct vent flue location

    No authority in this area, but I think you did well by your client. The possibility of CO leakage is worthy of advisement, regardless of the codes and the mere presence of PVC inside breathable air chambers is another concern. If it's not a code violation, it should be.


  4. #4
    Join Date
    Jul 2008
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    Snowbird (this means I'm retired and migrate between locations), FL/MI
    Posts
    4,086

    Default Re: Direct vent flue location

    Quote Originally Posted by Walker Haglock View Post
    What do you make of a direct vent PVC flue routed out the side of the home, but located inside of the cold air return? I wrote it up for several reasons, but mainly as a safety hazard. If that PVC joint hidden inside the cold air ever gets compromised, the carbon monoxide and other hot gases go right back into the system for re-distribution throughout the home.
    Not permitted. Shall not means no.

    Quote Originally Posted by 2009 IRC

    M1801.8 Duct penetrations. Chimneys, vents and vent connectors shall not extend into or through supply and return air ducts or plenums.



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