Re: CFM (100 per foot) in spray booth?
I think you want the square foot of opening of the booth.. as in the big open area you stand and spray. Just like a garage door opening, the area of the door.
TO keep the dust confined you need about 100FPM per square foot of opening, that is 100 CFM.
If you're limited on fan you can always make some sliding or hinged panels to close it off.
IMHO
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