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Got a fisher w 8" oulet but a 6" flue

Post in 'Classic Wood Stove Forums (prior to approx. 1993)' started by Tommybronco, Sep 8, 2012.

  1. Tommybronco

    Tommybronco New Member

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    So i got a great deal on a fisher..free. I have a 6" hole in the ceiling though. I have been to two new buildings with brand new stoves w 8" outlets that neck down to 6" is that ok for me to do?

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  2. begreen

    begreen Mooderator Staff Member

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    Moved to the classic forum for a more targeted response. What model Fisher?
  3. fossil

    fossil Accidental Moderator Staff Member

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    Tell us everything about the installed flue...is there more than just a 6" hole in the ceiling?
  4. Tommybronco

    Tommybronco New Member

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    The house originally had a woodburner with a 6" pipe. stove was removed for a gas stove 4" sleave into the 6". Now i want to put a wood burner stove back in. The stove is a two door fisher with an 8" outlet. Learning so much from this site since i found it two days ago. got to get home to inspect it to find out exactly what model it is.
  5. fossil

    fossil Accidental Moderator Staff Member

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    You'll want to have that existing flue inspected by a professional chimney sweep before you proceed with any modifications to the system. Rick
  6. Highbeam

    Highbeam Minister of Fire

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    You have a grandma or grandpa bear depending on the size. 6 bricks across the rear make it a grandpa. These stoves are designed to burn with those wide doors open so they all used an 8" flue. The larger stove was a Papa and it uses a 6" flue and a single door. This leads me to believe that so long as you don't burn with doors open, the firebox doesn't need an 8" flue but anytime you open both of those doors wide to add fuel you risk smoke spillage.

    A really nice and long 6" flue will outdraft a crappy 8" flue.
  7. ScotO

    ScotO Guest

    Welcome to the forums. You can neck it down (I'd do it right at the stove), but like others said you have to be careful not to run it wide open, you'd probably have some smoke spillage.
  8. Tommybronco

    Tommybronco New Member

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    perfect that is what i wanted to hear. i had read that the taller the pipe the better. It will be approx 22' to the top with the vaulted ceilings. Thanks so much.

    How bout the best vendor for 6" single wall for the main span from the stove to just before the ceiling?
  9. ScotO

    ScotO Guest

    Nothin off the top of my head, but go with either a heavy wall pipe or stainless single or double wall pipe. Look on the internet, if for nothing else just to get an idea of exactly what you want. Google it.
  10. begreen

    begreen Mooderator Staff Member

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    With that length of connector there is going to be significant cooling of the flue gases if single-wall is used. That can lead to major creosote accumulation. Normally it's recommended to not exceed an 8ft run of single-wall connector for this reason.
  11. ScotO

    ScotO Guest

    I agree BG. It would pay to go with a black double wall pipe for sure.

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