Re: Vent & Chimney
My 39" oven has an 8x8 inch flue and seems to draw just fine.
There is a lot of information on the site that relates flue size to oven size.
If you can post a picture it would help. But based on the information, if you have a 20x8 inch transistion to an 8x8 square or 8 inch round, it should work well for the average sized ovens I see built here.
good luck!!!
Christo
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