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  1. #1
    Join Date
    Oct 2010
    Location
    Southwest US
    Posts
    585

    Default Comments on shared furnace / water heater vent

    Not sure if this is OK. The furnace has an induced draft blower (not a cat IV). The vent extends up about 6 feet then is nearly horizontal (about 1/4 inch fer foot of rise) for about 10 feet where it tees into the water heater vent, then vertical out the roof. Vent sizes all looked OK. All type B and clearances looked OK. What I'm not sure about is the induced draft shared with the standard water heater and the long nearly-horizontal run.

    PB3000.jpg

    PB30000.jpg

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  2. #2
    Join Date
    Mar 2007
    Location
    Plano, Texas
    Posts
    4,170

    Default Re: Comments on shared furnace / water heater vent

    What is your overall rise? Is there any evidence of condensation or improper function?

    Jim Luttrall
    www.MrInspector.net
    Plano, Texas

  3. #3
    Join Date
    Feb 2008
    Location
    Caledon, Ontario
    Posts
    5,005

    Default Re: Comments on shared furnace / water heater vent

    I'd be calling for service prior to close of title. There is rust evident at the top and bottom of the access plate to the heat exchanger. Something amiss.


  4. #4
    Join Date
    Oct 2010
    Location
    Southwest US
    Posts
    585

    Default Re: Comments on shared furnace / water heater vent

    I would say the overall rise is about 20 feet. What I thought were condensation stains on the blower are actually stains from the humidifier above leaking. So no, no signs of improper drafting.


  5. #5
    Join Date
    Oct 2010
    Location
    Southwest US
    Posts
    585

    Default Re: Comments on shared furnace / water heater vent

    Quote Originally Posted by Raymond Wand View Post
    I'd be calling for service prior to close of title. There is rust evident at the top and bottom of the access plate to the heat exchanger. Something amiss.
    From the leaking humidifier I believe, but servicing is a good idea to see if there is permanent damage.


  6. #6
    James Duffin's Avatar
    James Duffin Guest

    Default Re: Comments on shared furnace / water heater vent

    How old is the installation? What you could be seeing is normal wear...


  7. #7
    Join Date
    Mar 2011
    Location
    Sparks,NV
    Posts
    109

    Default Re: Comments on shared furnace / water heater vent

    Nevada IOS#1730
    Nevada Energy Auditor #30
    775-342-4767 www.homecsi.com

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