I am no expert, but for what it is worth ~ If I am understanding correctly, you are asking about the exhaust vent, and the propane hose bring fuel to the torch.
I have my propane tank right under the exhaust fan. The incoming replacement air needs to be where the fresh air is, and I think 10 feet should be pretty good.
I personally would have the exhaust fan and propane hose at the end by the torch, and open the window 10 feet away for replacement air.
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