I seasoned my UDS and had a few problems. I did not have a very large fire. I was able to get the UDS to well over 230 for several hours. But... to do that I had to open all three bottom vents. I did not have an exhaust stack on it at the time (Since then I got a 10" pipe and screwed in the 2" bung). Could not having an exhaust stack cause back draft and smoke come out of my bottom vents?
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