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  1. #1
    Join Date
    Oct 2013
    Location
    NJ
    Posts
    1

    Default Concentric Direct Vent placement

    Hello,
    I am being told my current vent is not to code. I have a Peerless 80k btu older Munchkin type boiler which was installed by a previous owner. There is only one exhaust pipe vented to the exterior. It is a 4" pipe and is under a window. It exits 5 inches off the ground but is exhausting at 18" due to the addition of 2 90's on the end of the pipe. I know this is improper. My question is this: If I make the pipe a concentric, with a vent and exhaust to/from the boiler, and make sure it is 18" off grade through the wall and 12" below the window, will I be ok? The pipe is about 4 feet from a corner (two exterior walls meeting). I was told this is not an issue with Concentric Direct Vent pipes. Is this true? Any guidance would be helpful since this is in a problem area of the house! Thanks!!

    Member Benefits1

  2. #2
    Join Date
    Mar 2007
    Location
    New Mexico
    Posts
    1,258

    Default Re: Concentric Direct Vent placement

    That is going to be different for each unit. The manufacturer's instructions should state the clearances to the ground, window, corners, etc. Do you still have the instructions for the boiler? If so, you should see some diagrams in there. If not, you may need to try a web search for the manual.

    Jim Robinson
    New Mexico, USA

  3. #3
    Join Date
    Jul 2008
    Location
    Chicago
    Posts
    261

    Default Re: Concentric Direct Vent placement

    Quote Originally Posted by Diana Kane View Post
    Hello,
    My question is this: If I make the pipe a concentric, with a vent and exhaust to/from the boiler, and make sure it is 18" off grade through the wall and 12" below the window, will I be ok?
    Yes.

    Quote Originally Posted by Diana Kane View Post
    The pipe is about 4 feet from a corner (two exterior walls meeting). I was told this is not an issue with Concentric Direct Vent pipes. Is this true? Any guidance would be helpful since this is in a problem area of the house! Thanks!!
    I think the 4' rule still applies with direct vent (concentric) to inside corners.

    Read this. Go to VENTING, COMBUSTION AIR & CONDENSATE REMOVAL
    http://munchkinboiler.net/uploads/Mu...stallation.pdf

    Mike Lamb
    Inspection Connection, Inc.
    http://www.inspection2020.com/

  4. #4
    Join Date
    Jul 2008
    Location
    Utah
    Posts
    389

    Default Re: Concentric Direct Vent placement

    Quote Originally Posted by Diana Kane View Post
    Hello,
    I am being told my current vent is not to code. I have a Peerless 80k btu older Munchkin type boiler which was installed by a previous owner. There is only one exhaust pipe vented to the exterior. It is a 4" pipe and is under a window. It exits 5 inches off the ground but is exhausting at 18" due to the addition of 2 90's on the end of the pipe. I know this is improper. My question is this: If I make the pipe a concentric, with a vent and exhaust to/from the boiler, and make sure it is 18" off grade through the wall and 12" below the window, will I be ok? The pipe is about 4 feet from a corner (two exterior walls meeting). I was told this is not an issue with Concentric Direct Vent pipes. Is this true? Any guidance would be helpful since this is in a problem area of the house! Thanks!!
    It is under a window? I don't have a code book at home but I think you have a very real issue. I'll try to weigh in tomorrow but in the meantime, don't open your window.

    Last edited by Rod Butler; 10-25-2013 at 03:38 PM.

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