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pizzahead 09-30-2008 05:31 PM

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?


dmun 09-30-2008 07:07 PM

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.

RTflorida 09-30-2008 09:02 PM

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)


nissanneill 10-01-2008 03:21 AM

Re: Casting a vent?
1 Attachment(s)
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.


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