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    Venting oil burning appliances

    Venting oil burning appliances

    New postby Anthony on Fri Aug 27, 2010 9:25 am

    Can oil burning appliances be vented with a class b vent or does it have to be class L?
    Anthony
     
    Posts: 5
    Joined: Wed Jul 28, 2010 12:33 pm

    Re: Venting oil burning appliances

    New postby Jerry Peck - Codeman on Fri Aug 27, 2010 5:36 pm

    From the 2006 IRC:
    - Table M1804.1
    - - Type L oil vents are for oil-burning appliances which are listed and labeled for venting with Type L vents

    G2403 General Definitions
    - VENT. A pipe or other conduit composed of factory-made components, containing a passageway for conveying combustion products and air to the atmosphere, listed and labeled for use with a specific type or class of appliance.
    - - Special gas vent. A vent listed and labeled for use with listed Category II, III and IV gas appliances.
    - - Type B vent. A vent listed and labeled for use with appliances with draft hoods and other Category I appliances that are listed for use with Type B vents.
    - - Type BW vent. A vent listed and labeled for use with wall furnaces.
    - - Type L vent. A vent listed and labeled for use with appliances that are listed for use with Type L or Type B vents.

    The last part is the answer to your question: An appliance listed for use with a Type B vent may be vented into a Type L vent, however, the reverse does not hold true. Thus an oil-burning appliance listed and labeled for venting into a Type L vent is not suitable for venting into a Type B vent.

    The Type L vent is listed for higher temperatures than a Type B vent. Also, the clearances around a Type L vent are greater than around a Type B vent, therefore a Type B vent could create a fire hazard if an appliance is listed for use with a Type L vent, even if the Type B vent itself did not fail, combustible material around the Type B vent could catch fire due to the higher temperatures and lack of sufficient clearance.

    If you need more information I can contact my expert and have him reply with more information.
    Jerry Peck - CodeMan
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