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Chimney options - Forno Bravo Forum: The Wood-Fired Oven Community



I'm Peter Reinhart! Ask Me Anything! Monday, February 15, 2016 7:00-8:00 pm EST

To kick off our AMA feature, we have invited author, chef and master bread maker and host of Pizza Quest, Peter Reinhart, to be our first host! Peter will be in the Forum on Monday, February 15th, from 7:00 - 8:00 pm EST. If you are unable to be online during the live session, you can post your questions in the sticky post. Peter will answer those questions during the live session on February 15th. You can view Peter's answers to your questions as well as what happened during the live session in the session thread.

Ask Me Anything New Forum Feature

You will notice a new forum at the top of the main page called, "Ask Me Anything". This forum will be used for live one hour "Ask Me Anything" (AMA) sessions hosted by people who are knowledgeable in different areas pertaining to wood fired ovens. How it works:
- Each AMA will have a "sticky" thread where the community can post questions they would like answered during the live session. This will allow everyone to participate even if you can't be online for the live session. These questions will not be answered by the host until the live AMA; if you need an answer quickly, you should post it in the appropriate Forum area for the community to respond.
- Another thread will be posted for the live AMA. Registered users who are logged in during the live session can interact with the host by asking questions and receiving responses.
- The live thread will remain in the AMA forum to view after the session.

We hope you enjoy this new feature! Please let us know if there is a topic that you'd like to have as an AMA and we'll look for a host!

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Chimney options

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  • Chimney options

    > hi everybody,
    > since i just finished the dome this last saturday, i myself too, feel
    > that i am done building my breadoven and are now able to start
    > cooking......


    > i have another question however, concerning the vent and chimney?
    > can i get the steel vent and flue at home depot or do i have to get it
    > custom made? i know some of you just did it yourselfs, cutting steel
    > and welding it together. it looks easy enough, but i don't know how to
    > welt yet. (learning to weld is a project for some other time).

    Yep. Home Depot carries stove pipe & chimney toppers that will work.
    Get a 3' or longer pipe section (the stainless steel double-walled one
    will last years & years) and a chimney top that fits on top. The
    chimney top will provide a spark arrestor function.

    > would a chimney of 2 feet lenght be enough or would 3 feet be better? i

    3 is better as it will draw more. In fact if you can get it a foot
    taller than the roof will be (within 2 feet) that's best. (The "within
    2 feet means you measure out 2' from the chimney location and mark the
    highest part of the roof you hit. Make the chimney at least 1' taller
    than that -- it helps provide room for the draft to exit the chimney.
    So in the case of mine where I've got a steeply pitched A-frame roof,
    it really only had to just come out the roofing but it actually sticks
    up about 10".)

    > am intending on using a 8inch steel round chimney.
    > also, can i use the same portland/fireclay/sand mix to cement the steel
    > vent & chimney in?

    Good size. I've got a 9x12 rectangular one that draws like a champ.
    Any smaller than 8" may not draw quite as well so you'd want to have
    more of a baffle in front of it to force the smoke up the chimney
    (which will lower the front door).

    > has anyone some piece of advise? what i should avoid?

    Avoid the plain galvanized pipe sections. They'll outgas some nasty
    stuff because this will get *hot*. They will also corrode over time
    with the effect of the acidic smoke & burning galvanization...probably
    only last a couple/three years. The single-wall black chimney pipe is
    better (next best to clay flue liners & stainless steel double-wall).

    > any advise is very much appreciated!
    > thanks to all of you to get me so far
    > simone

  • #2
    Re: Chimney options

    Any ideas what type of store will carry terra cotta pipe? I have been burning up google and so far no luck.


    • #3
      Re: Chimney options

      Terra cotta pipe? Like drain tile? It's become increasingly obsolete since the introduction of perforated plastic pipe. There was also a glazed clay sewer pipe that's disappeared for the same reason.

      Since this is an oven blog, you may be talking about refractory flue tile, which is a standard masonry item, and should be available at any brickyard.
      My geodesic oven project: part 1, part 2


      • #4
        Re: Chimney options

        They still make and use clay pipe, glazed and unglazed, but neither is suitable for the chimney on a WFO. Just ask for "clay flue liner".