8" to a 6"??

jnorris56 Posted By jnorris56, Dec 17, 2011 at 5:04 PM

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  1. jnorris56

    jnorris56
    Member 2.
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    Nov 17, 2011
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    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.
     
  2. LLigetfa

    LLigetfa
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    Nov 9, 2008
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    Against code in most places.
     
  3. begreen

    begreen
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    Nov 18, 2005
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    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.
     
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