Chimney Question For New Stove

RoosterBoy Posted By RoosterBoy, Jul 21, 2006 at 2:45 PM

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  1. RoosterBoy

    RoosterBoy
    New Member

    Jul 5, 2006
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    CT
    hay guys i have a Vermont casting stove right now that uses a 8 inch chimney straight up free standing wood stove no bends

    the new stove i am getting is a Avalon and it has a 6 inch opening can i use six inch black pipe till it hits the ceiling and then use a reducer so it it go's into the 8 inch class a chimney all ready installed.

    id like to take it out and use 6 inch's all the way up but money is tight this year I'm spending it on more wood and buying a new stove.

    whats the down side to using a reducer on the chimney

    thanks
    Jason
     
  2. MountainStoveGuy

    MountainStoveGuy
    Minister of Fire

    Jan 23, 2006
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  3. elkimmeg

    elkimmeg
    Guest

    If it is an all interior location to the roof line 6" to 8'' is code compliant. The issue is draft, Can a stove producing draft out of a 6" flue collar, sufficiently heat the 8" pipe area to promote decent draft? Quite possible for the interior chimney location. However I would not remove much or the Class A 8" pipe, to run a longer single wall 6" connector pipe. The class A will still hold more heat in to promote better draft than single wall. (My oppinion not code)
     
  4. RoosterBoy

    RoosterBoy
    New Member

    Jul 5, 2006
    170
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    Loc:
    CT
    thanks guys i just want the stove to run efficient. it is running up into my attic and out the roof.

    i will run five feet of single wall pipe till it reaches the celling then it will have a reducer that will go to 8" directly into my class a. i just want to get away with it this year and next year i will have it all 6 inch.

    think i will have any problems. the total chimney height is 13 ft from the stove to the top of the cap

    thanks
    Jason
     
  5. MountainStoveGuy

    MountainStoveGuy
    Minister of Fire

    Jan 23, 2006
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    Loc:
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    You could have problems, yes. thats not a very tall chimney and the volume wont help. But you got to do what you got to do. you might have to put up with hard starts and backpuffing, if that happens then you know what you have to change. I would say on a 13' 8" chimney you will likely have problems on a 6" high efficiency epa stove. Any amount of negative pressure will compound the problem.
     
  6. Corie

    Corie
    Minister of Fire

    Nov 18, 2005
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    Loc:
    Halifax, VA
    Yeah I have to agree with all that's been said so far. But as far as this year goes, like elk said, it's code compliant and it will probably work "ok" but the possibilty of hard starts or difficulty burning in warmer temperatures is possible.
     
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