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  1. #1
    Join Date
    Jan 2008
    Location
    USA
    Posts
    49

    Wood Stove (Insert) ; can i use B-Vent ??

    Ill be buying a Wood Stove to sit partially in the fireplace . The Fireplace has an 8" heavy wall metal Vent going straight up about 20' . I have alot of 6" B-Vent (double wall) Vent which id like to use since its a straight shot all the way up. Can you see any reason why I couldnt use B-Vent ? The instructions say to use a flexible stainless steel liner ... but it doesnt say B-Vent cant be used. Any advice ? Thanks.

  2. #2
    Join Date
    Oct 2008
    Location
    Coming to a town near you soon
    Posts
    774
    Id follow the manufactures recommendations. My car doesnt say not to use water instead of gas but Im not going to try it.

  3. #3
    Join Date
    May 2005
    Location
    Madison, WI
    Posts
    1,078
    Please do not use the B-vent. There is a reason they have different vent for wood appliances. The B-Vent is not rated for 1700 or 2100 deg which a wood appliance requires. I don't really know what it would do since I have never done it, but I know the outcome would not be good. I would recommend have a pro install the stove for you.

    clintkennon makes a good point... if the manual had to list every type of vent NOT to use there would be a few pages just on that topic. Consider anything NOT in the manual to be not allowed. You MUST use listed and tested solid fuel chimney system and install all components to the manufacturer installation instructions.

  4. #4
    Join Date
    Aug 2004
    Location
    S.E. Pa
    Posts
    6,192

    Exclamation

    Before you install a woodstove into an existing fireplace, it needs a level II inspection to determine the suitability. This will also guide venting choices. If this is a factory built fireplace, you cannot install a woodstove into it. If it is masonry and in acceptable condition, then install a listed liner properly sized and insulated to meet UL 1777 for a 2,100F zero clearance listing.

    B-vent is rated only for category I gas appliances and not approved for wood. Schedule 40 PVC pipe is not approved for wood either but they dont' list it in the manual. Instead of listing what materials are unsuitable, they state what is: venting that is tested and listed for that application. For wood, that means a liner that is listed to UL 1777. To meet that listing, you will require that liner mfrs. special insulation. There are four levels of insulation required: zero clearance and 1" for combustibles in contact with the outside of the chimney then the same with the liner either in contact or 1" from the inside of the chimney. ALL liners for wood require insulation-period. Naked liners do not meet the UL 1777 requirements for 2,100F without insulation.

    If you use a factory chimney for wood, it must meet UL 103HT. Most all of this chimney carries a 2" clearance to combustibles. You must use all the listed components the mfr. specifies. For instance, you cannot use homemade firestops.
    HTH,

  5. #5
    Join Date
    Jan 2008
    Location
    USA
    Posts
    49
    Quote Originally Posted by clintkennon View Post
    Id follow the manufactures recommendations. My car doesnt say not to use water instead of gas but Im not going to try it.
    My car says to use water : http://www.youtube.com/watch?v=I4RWduwXZgs

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