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8" to a 6"??

Post in 'Classic Wood Stove Forums Pre-EPA (prior to 1988)' started by jnorris56, Dec 17, 2011.

  1. jnorris56 New Member

    joined: Nov 17, 2011
    13 posts
    Eastern Shore, MD
    Is it safe to install and 8" rear exhaust and krimp the exit pipe down to a 6" thimble? I know probably not ideal but found a cheap rear exit sierra that needs painting but other than that in good condition.
    jnorris56, Dec 17, 2011
    #1

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  2. LLigetfa Minister of Fire

    joined: Nov 9, 2008
    7,310 posts
    NW Ontario
    Against code in most places.
    LLigetfa, Dec 17, 2011
    #2

  3. begreen Super Moderator

    joined: Nov 18, 2005
    36,118 posts
    South Puget Sound, WA
    Correct, generally not allowed, though sometimes there are exceptions. Safety has a lot to do with lots of factor, venting is just one of them. Tell us more about your setup and what you are trying to accomplish and we can help better.

    What's the current chimney height and condition? What would be the plan for this installation, full stainless liner? How close are the nearest combustibles?, etc. etc.
    begreen, Dec 17, 2011
    #3

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