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Perlite Concrete on free form igloo

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  • #16
    Re: Perlite Concrete on free form igloo

    Please do keep us updated on this! I know your chimney R&D will be helpful to more than a few members, and the subject of indoor WFO's seems to be getting a ton of action lately on several threads.

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    • #17
      Chimney throat adjustment

      After last nights smoke leaking I was a little disappointed. I finally decided to open up the throat a little as shown in the pictures. It seemed that most of the smoke was leaking past the throat on the sides. I cut the throat to curve from the edge of the oven opening up to match the width of the flue liner. A little dusty for an inside job and unfortunately I nicked a few bricks with the grinder wheel, but I did manage to get a nice curve. I loosely put the chimney back together, temporarily taped the joints with aluminum tape and built fire number 4. Not a lick of smoke leaked this time. I plan to keep the chimney in its temporary unmortared state until the curing process is done and I have seen enough fire conditions to be sure the chimney is working up to expectations.

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      • #18
        Re: Perlite Concrete on free form igloo

        Marty,
        another possible solution if you continue to get smoke out of your front archway is to make a door or even a blind to fill the top half of the opening thus making it harder for the smoke to escape with the rush of air into the oven. A top half door will also force the smoke up your generous flue.


        Neill
        Prevention is better than cure, - do it right the first time!

        The more I learn, the more I realise how little I know


        Neill’s Pompeiii #1
        http://www.fornobravo.com/forum/f8/n...-1-a-2005.html
        Neill’s kitchen underway
        http://www.fornobravo.com/forum/f35/...rway-4591.html

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        • #19
          Re: Perlite Concrete on free form igloo

          You might also consider a draft door to channel air and smoke on startup. Your oven is unlikely to leak smoke once the fire's going.
          My geodesic oven project: part 1, part 2

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          • #20
            Re: Perlite Concrete on free form igloo

            I plan on making the front arch 2" lower than the inner arch to help with the smoke leaking. It appears yours are the same height?

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            • #21
              Re: Perlite Concrete on free form igloo

              I plan on making the front arch 2" lower than the inner arch to help with the smoke leaking. It appears yours are the same height?
              I thought about doing that. I think it would have made the difference of smoking or not smoking for my oven. I was concerned about the ease of using the door. Tipping the door under the dropped section would work just fine.

              I have also considered an inner and outer door with a damper or air control device. I may still do that. So far no more smoking. Opening up the throat made a huge difference.

              I am also considering making a clean-out for the lower part of the flue by cutting a square hole in the first tile as seen in the photo below. Since I have got things working for now I am hesitant to make any changes though.

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