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  1. #1
    Jon mackay's Avatar
    Jon mackay Guest

    Default Furnace vent initial rise

    I know that water heaters must have an 18" vertical rise befor the first transition.

    Is there a rule for gas furnaces?

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  2. #2
    Join Date
    Mar 2007
    Location
    Chicago, IL
    Posts
    2,797

    Default Re: Furnace vent initial rise

    I'm not aware of a 18" requirement for any gas appliance.

    This questions comes up here often, this is likely the most useful (if somewhat ... err.. contentious) iteration, see the second version of Jerry Peck's .pdf, near the middle of the thread.

    http://www.inspectionnews.net/home_i...ust-slope.html

    Michael Thomas
    Paragon Property Services Inc., Chicago IL
    http://paragoninspects.com

  3. #3
    David Bell's Avatar
    David Bell Guest

    Default Re: Furnace vent initial rise

    Most gas water heaters I have seen with draft hoods have a 6" requirement before any change in direction.


  4. #4
    Join Date
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    Default Re: Furnace vent initial rise

    Quote Originally Posted by David Bell View Post
    Most gas water heaters I have seen with draft hoods have a 6" requirement before any change in direction.
    !2 inches.

    Show us where it only requires 6 inches.

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

  5. #5
    David Bell's Avatar
    David Bell Guest

    Default Re: Furnace vent initial rise

    Here is an example

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  6. #6
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    Default Re: Furnace vent initial rise

    Quote Originally Posted by David Bell View Post
    Here is an example
    Thank you,

    Q. Now, however, when you take the code's connector rise chart minimum of 1 foot and try to match that with that manufacturer's drawing (do you know how old that is?) what do you end up with?

    A. The most restrictive shall apply. (From the codes.)

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

  7. #7
    David Bell's Avatar
    David Bell Guest

    Default Re: Furnace vent initial rise

    Are those not B-Vent requirements? Show me single wall pipe requirements.


  8. #8
    Ron Bibler's Avatar
    Ron Bibler Guest

    Default Re: Furnace vent initial rise

    I see this form time to time.

    Best

    Ron

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  9. #9
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
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    Default Re: Furnace vent initial rise

    Quote Originally Posted by David Bell View Post
    Are those not B-Vent requirements? Show me single wall pipe requirements.

    First, go back and review the drawing you posted.

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

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