Building Code and Building Construction - Questions and Answers
Or when you want to know how construction is supposed to be done.

|
AskCodeMan.com
|
The following Codemen are available to answer your questions:
All Codes and Standards - Jerry Peck, Codeman


Q&A Board links
  • REGISTER

  • FAQ

  • LOGIN

  • Q&A BOARD INDEX

  • View New Questions

  • View Unanswered Questions

  • View Active Questions/Answers

  • Mark Questions as read

  • View Your Questions

  • Go To Your User Control Panel




  • Links to:
  • Construction Litigation Consultants


  • Florida Building Commission

  • Florida Building Codes Online


  • International Code Council

  • ICC Codes Free Online


  • Building Officials and Administrators of Florida




  • Product Approvals
  • Florida Product Approval

  • ICC Evaluation Reports Search

  • Miami-Dade NOA Search




  • Inspector and Contractor License Search
  • Search Florida Licenses




  • Technical links
  • Technical Information page


























































  • Contact Codeman



  • Custom Search

    b vent on furnace located in basement 2 feet from chimney

    b vent on furnace located in basement 2 feet from chimney

    New postby WARREN40 on Thu Feb 18, 2010 1:20 am

    i installed a furnace in Detroit michigan and the inspector wants a b vent installed is this code it has a 6" flue
    WARREN40
     
    Posts: 1
    Joined: Thu Feb 18, 2010 12:50 am

    Re: b vent on furnace located in basement 2 feet from chimney

    New postby Jerry Peck - Codeman on Thu Feb 18, 2010 10:18 pm

    Hi Warren,

    The type of vent has to do with the type of appliance, not the size of the vent.

    Is it a natural draft gas furnace? If so, then a Type Gas Vent is what is required, the size based on many variables.

    If it is a condensing gas furnace then it would need a different type of vent.

    I've contacted someone for additional input, if you could provide the type of furnace for him it would help with the answer.
    Jerry Peck - CodeMan
    AskCodeMan.com

    Construction and Litigation Consultant
    Construction Litigation Consultants, LLC.
    ConstructionLitigationConsultants.com
    User avatar
    Jerry Peck - Codeman
    Site Admin
     
    Posts: 1097
    Joined: Fri Dec 12, 2008 12:06 pm

    Re: b vent on furnace located in basement 2 feet from chimney

    New postby Hearthman on Thu Feb 18, 2010 10:51 pm

    Warren, you didn't provide much info. so I'm not sure what you're dealing with or asking. Are you saying the AHJ wants you to install a B-vent in lieu of a listed liner in the chimney or is he asking you to use B-vent as a vent connector to the masonry chimney?

    You must also consult the mfrs listed instructions. Some furnaces require a B-vent connector even in a conditioned space venting into an interior chimney. The codes and mfr much be consulted for specifics in vent connector sizing.

    Modern 80% fan asisted furnaces run on such low stack temps, there is very little heat lost to warm the stack and thus create draft. The use of B-vent prevents stack connector losses, which helps draft while reducing condensation of flue gases. If this furnace does not have a post-purge cycle, one can easily be added, which will purge much of the moisture out of the stack and reduce condensation.

    Is there a gas water heater common vented with this furnace?

    Hearthman
    Keep the fire in the fireplace.
    Hearthman
     
    Posts: 14
    Joined: Sun Mar 01, 2009 9:49 pm
    Location: Philly


    Return to Mechanical: Heating and cooling equipment, duct work, ventilation and exhaust fans



    Who is online

    Users browsing this forum: No registered users and 1 guest



    www.AskCodeMan.com