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Casting a vent? - Forno Bravo Forum: The Wood-Fired Oven Community



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Casting a vent?

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  • Casting a vent?

    I am thinking of casting my vent for my 42" oven. The instructions say to cast it using a form etc. They do not say if it needs to be a special type of refractory concrete or just regular concrete.

    Will regular concrete handle the heat in the vent/chimney?


  • #2
    Re: Casting a vent?

    No: The vent area, particularly down near the oven, gets very hot. You need to cast it out of refractory, or build the transition up with firebrick.
    My geodesic oven project: part 1, part 2


    • #3
      Re: Casting a vent?

      to add to dmun's comments - be sure to use a castable refractory, not Refmix, Heatstop, or the fireclay home brew mortars. I think various manufacturers also offer insulating castable refractory as well.
      Sorry for the lack of specifics, it has been 1 1/2 yrs since I actually researched this myself (opting to stick will brick, a Duravent transition plate and Duravent pipe for a chimney)



      • #4
        Re: Casting a vent?

        A quick and easy solution to this problem is to cut your transition out of stainless steel and tack it together as I have just done for Hendo's oven (pic)
        I will arrange to fit it with the lights on Saturday with a few small dyna bolts located in the centre of the firebrick archways.
        It also makes the fitment and aiming of the oven illumination a breeeeze.

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

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

        Neillís Pompeiii #1
        Neillís kitchen underway