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  1. #1
    Jay Barnett's Avatar
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    Default Intake & Exhaust question

    Home was built in 2007. Lennox High efficiency furnace installed. In the attic the intake & exhaust were "Y'd" into the same vent through the roof. Is this acceptable??? I thought they were to be totally separate.

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  2. #2
    Jay Barnett's Avatar
    Jay Barnett Guest

    Default Re: Intake & Exhaust question

    Here is the picture of the intake/exhaust

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  3. #3
    Join Date
    Aug 2007
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    Memphis TN.
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    Default Re: Intake & Exhaust question

    Quote Originally Posted by Jay Barnett View Post
    .
    I thought they were to be totally separate.
    .
    Correct.
    .

    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.

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

    Default Re: Intake & Exhaust question

    Not so fast, what did the roof top vent look like?
    Anything like this?
    Weil Mclain 383-500-350 - Weil Mclain - Concentric Vent Termination Kit For Weil McLain Ultra Boilers
    [IMG]file:///C:/DOCUME%7E1/User/LOCALS%7E1/Temp/moz-screenshot-2.png[/IMG]

    Jim Luttrall
    www.MrInspector.net
    Plano, Texas

  5. #5
    Join Date
    Aug 2007
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    Memphis TN.
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    Default Re: Intake & Exhaust question

    Quote Originally Posted by Jim Luttrall View Post
    .
    ]\Not so fast, what did the roof top vent look like?
    Anything like this?
    Weil Mclain 383-500-350 - Weil Mclain - Concentric Vent Termination Kit For Weil McLain Ultra Boilers
    [IMG]file:///C:/DOCUME%7E1/User/LOCALS%7E1/Temp/moz-screenshot-2.png[/IMG]
    .
    I stand Corrected.
    * page 32 figure 30. ( entire manual too large to upload, your model may vary.)
    .

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    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.

  6. #6
    Jay Barnett's Avatar
    Jay Barnett Guest

    Default Re: Intake & Exhaust question

    Thats it! attached is the actual top view of this intake/exhaust. But it was a Lennox high efficiency furnace? Never seen this intake/exhaust used before???

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  7. #7
    Join Date
    Aug 2007
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    Default Re: Intake & Exhaust question

    Quote Originally Posted by Jay Barnett View Post
    Thats it! attached is the actual top view of this intake/exhaust. But it was a Lennox high efficiency furnace? Never seen this intake/exhaust used before???
    .
    .....
    .

    Attached Files Attached Files
    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
    David Bell's Avatar
    David Bell Guest

    Default Re: Intake & Exhaust question

    Concentric vent that all manufacturers can supply as an option to a 2 pipe discharge and intake.


  9. #9
    ray jackson's Avatar
    ray jackson Guest

    Default Re: Intake & Exhaust question

    Yes that is a concentric vent termination, and is approved by all manufacturers I've ever dealt with. One thing to watch out for though is the vent has to enter the straight end of the termination with the intake at the 45 degree end. If the two lines are reversed the vent gasses can re-circulate into the furnace and cause failures.


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