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  1. #1
    Join Date
    Mar 2007
    Location
    Tampa, Fl
    Posts
    155

    Default Maximum angle on flue

    flues for gas furnaces and water heaters were not vertical at roof. I guess they were either trying to get clearance from the roof or they didn't have the proper boot/flashing/thimble at the supply house for such a high pitched roof. Is this acceptable and if not, what is the max angle? Seems that a wind blowing in the right direction could blow those gasses back down the flue. Sorry, don't inspect many gas appliances down here.

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  2. #2
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,248

    Default Re: Maximum angle on flue

    I looked at a couple of installation installation instructions and they state "vertical" and those are not "vertical".

    Do you have the manufacturer of the vent? You could send them the photos and have them respond stating that they are acceptable or not.

    I'm going to guess that they were also not strapped and supported properly in the attic.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  3. #3
    Join Date
    Mar 2007
    Location
    Tampa, Fl
    Posts
    155

    Default Re: Maximum angle on flue

    Thanks Jerry. You would be right... in fact there was negative slope in the attic and one connection was not secured...so recommended full review of system and repair as needed. We don't want anyone taking a permanent nap.


  4. #4
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,248

    Default Re: Maximum angle on flue

    Matthew,

    When not supported and strapped properly in the attic, that allows the wind to blow the vents around, they may have been installed "vertically" and are not because the wind blew them sideways.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  5. #5
    Join Date
    Mar 2007
    Location
    Plano, Texas
    Posts
    4,170

    Default Re: Maximum angle on flue

    That is a very common issue here where gas appliances are common.
    Good call.

    Jim Luttrall
    www.MrInspector.net
    Plano, Texas

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