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Vent exit at dome apex - Forno Bravo Forum: The Wood-Fired Oven Community

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Vent exit at dome apex

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  • Vent exit at dome apex

    I'd like to route my vent pipe over the top middle of the dome, over the dome insulation before completely enclosing. My concern is whether using a couple of 45 degree elbows will somehow affect vent flow and its ability to draw efficiently. My oven is 34" and I plan on using 6" pipes. The chimney pipe will be several feet tall to clear the roof line of my home.

    George
    George

    My 34" WFO build

    Weber 22-OTG / Ugly Drum Smoker / 34" WFO

  • #2
    Re: Vent exit at dome apex

    2 30 degree bends are allowed for fireplace code, I wouldn't do more than that.

    Comment


    • #3
      Re: Vent exit at dome apex

      Originally posted by Tscarborough View Post
      2 30 degree bends are allowed for fireplace code, I wouldn't do more than that.
      Thanks, I've heard that before but would that yield a vertical vent exit?
      I've been looking at single walled stove pipes and I can only seem to find 45* elbows.

      George
      George

      My 34" WFO build

      Weber 22-OTG / Ugly Drum Smoker / 34" WFO

      Comment


      • #4
        Re: Vent exit at dome apex

        Stove pipe is different. I am pretty sure that double or triple wall is the recommendation for ovens. 2 30's set opposite will duplicate whatever angle the pipe enters the first elbow.

        Comment


        • #5
          Re: Vent exit at dome apex

          Thanks again.
          Double walled 30* elbows and pipes are way too expensive for what I want to achieve, and especially for the chimney height I need.
          Codes aside, is there any reason why I can't bury a blanket insulated single walled stove pipe under the dome enclosure and use single walled throughout?

          George
          George

          My 34" WFO build

          Weber 22-OTG / Ugly Drum Smoker / 34" WFO

          Comment


          • #6
            Re: Vent exit at dome apex

            I think the general concern is that because of the amount of expansion and contraction, you can not get a single walled pipe to seal well. As long as it is all outside and has no penetrations through wood I probably wouldn't worry too much about it (but I still wouldn't go over 30 degrees, you will get extreme build up of flammable soot in 45's).

            Comment


            • #7
              Re: Vent exit at dome apex

              With the flue against the dome it should heat quickly and improve draw, which should compensate for the bends.
              Kindled with zeal and fired with passion.

              Comment


              • #8
                Re: Vent exit at dome apex

                Originally posted by david s View Post
                With the flue against the dome it should heat quickly and improve draw, which should compensate for the bends.
                Thanks, I hope so...

                George
                George

                My 34" WFO build

                Weber 22-OTG / Ugly Drum Smoker / 34" WFO

                Comment


                • #9
                  Re: Vent exit at dome apex

                  If it is outside the insulation, it won't warm, but it WILL warm faster because it will have less draw.

                  Comment


                  • #10
                    Re: Vent exit at dome apex

                    Ok. What if I used just one elbow as shown in my sketch? I like the single elbow design better.

                    George
                    Attached Files
                    George

                    My 34" WFO build

                    Weber 22-OTG / Ugly Drum Smoker / 34" WFO

                    Comment


                    • #11
                      Re: Vent exit at dome apex

                      That should work.

                      Comment


                      • #12
                        Re: Vent exit at dome apex

                        Yeah, I too think it will work. I will try these components and see how the set up draws before I enclose the oven.

                        Thanks...George
                        George

                        My 34" WFO build

                        Weber 22-OTG / Ugly Drum Smoker / 34" WFO

                        Comment


                        • #13
                          Re: Vent exit at dome apex

                          Elbows for stove pipe are adjustable they spin in multiple places to make any angle

                          Comment


                          • #14
                            Re: Vent exit at dome apex

                            Originally posted by shuboyje View Post
                            Elbows for stove pipe are adjustable they spin in multiple places to make any angle
                            I realize most do that. I was looking at rigid 1 piece elbows.

                            George
                            George

                            My 34" WFO build

                            Weber 22-OTG / Ugly Drum Smoker / 34" WFO

                            Comment

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