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  1. #1
    Clay White's Avatar
    Clay White Guest

    Default Different sized furnace vent pipe segments

    Last edited by Clay White; 01-02-2008 at 03:09 PM.
    OREP Home Inspector E&O Insurance 2

  2. #2
    Join Date
    Aug 2007
    Location
    Memphis TN.
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    4,311

    Default Re: Different sized furnace vent pipe segments

    Clay,

    The size of the SW Vent doesn't bother me the distance to combustibles does.

    Also I can't see any screws to connect B1 to SW Vent.

    Appears be water stained by SW Vent patched? Active Leak?

    It Might have Choked Artie But it ain't gone'a choke Stymie! Our Gang " The Pooch " (1932)
    Billy J. Stephens HI Service Memphis TN.

  3. #3
    Jon Randolph's Avatar
    Jon Randolph Guest

    Default Re: Different sized furnace vent pipe segments

    Looks like a single wall vent going through the ceiling. I would be concerned about clearance to combustibles.


  4. #4
    Join Date
    Aug 2007
    Location
    Memphis TN.
    Posts
    4,311

    Default Re: Different sized furnace vent pipe segments

    Quote Originally Posted by Billy Stephens View Post
    Clay,

    The size of the SW Vent doesn't bother me the distance to combustibles does.
    Quote Originally Posted by Jon Randolph View Post
    Looks like a single wall vent going through the ceiling. I would be concerned about clearance to combustibles.

    Jon, ??

    It Might have Choked Artie But it ain't gone'a choke Stymie! Our Gang " The Pooch " (1932)
    Billy J. Stephens HI Service Memphis TN.

  5. #5
    Jon Randolph's Avatar
    Jon Randolph Guest

    Default Re: Different sized furnace vent pipe segments

    Sorry,

    I looked at the pic and read the original post but I guess that I didn't see your comment.

    We need an icon to designate "foot in mouth"


  6. #6
    Join Date
    Mar 2007
    Location
    Lake Barrington, IL
    Posts
    1,363

    Default Re: Different sized furnace vent pipe segments

    The section that runs into the ceiling is a B-vent. In our area of N. Illinois condensation formation is a very frequent occurrence and I suspect that this installation would lead to problems if installed here.

    I think that it's warranted to question this installation. The problem is that the contractor may have no understanding of your reasoning is.

    Eric Barker, ACI
    Lake Barrington, IL

  7. #7
    Join Date
    Aug 2007
    Location
    Memphis TN.
    Posts
    4,311

    Default Re: Different sized furnace vent pipe segments

    Quote Originally Posted by Eric Barker View Post
    The section that runs into the ceiling is a B-vent.

    Vent is still too close to combustibles.

    It Might have Choked Artie But it ain't gone'a choke Stymie! Our Gang " The Pooch " (1932)
    Billy J. Stephens HI Service Memphis TN.

  8. #8
    buddy brault's Avatar
    buddy brault Guest

    Default Re: Different sized furnace vent pipe segments

    Hey Clay, I agree with Eric on the b vent through ceiling. I do not see any connection between the vent increaser and the existing vent. I looks like tabs on b vent so there should be a snap ring. Screws would be ok provided they don't penetrate the inner wall of the vent. Also would also need 1" clearance around. By the way does the furnace have a draft inducer motor?


  9. #9
    Byron Lentz's Avatar
    Byron Lentz Guest

    Default Re: Different sized furnace vent pipe segments

    Yes it is a problem; the vent system is designed to flow at the size of the outlet of the combustion chamber. And yes condensation will likely form and run back down to the combustion chamber. I also am a HVAC contractor and this type of set up has made me money before.


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