got a couple of questions.on a reverse flow smoker build

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Original poster
Oct 3, 2012
powell. tn
I'm building a reverse flow smoker with what I was told is a 40 gallon tank. According to feldon my 1/2 moon opening should be 11.19". 49.15 sq.inches. the ? I have is the 11.19 at the widest point of the 1/2 moon or is this the total of the opening .or can I just cut the entire opening from the fire box .the box is 24x16x16 setting in the box at 5". Thanks for the help. is reader supported and as an Amazon Associate, we may earn commissions from qualifying purchases.

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