I am not sure I understand. A paint booth should have the fumes drawn thru it and vented outside, could hook it up thru a window. This is why the fuss over the motor,,,, its not a problem to pressurize a booth but it doesn't clear fumes,,, it blows them everywhere. You need a draw with restriction on the inlet to move air in an orderly fashion, drawing across the room. Sucking thru filters, even cracks. My booth isn't sealed but has enough fan to pull the gaps together and I am familiar where it draws, where dust may come in, the sweet spot that if I stand along the wall and shoot paint across the bay can see it drawn in to a plume and exhausted out as evidenced by a total lack of overspray.
The cut down of the fan is not finished in one of the pics, I flashed it. After I set up I run it a minute. Most of the air comes over the end downdraft. I don't really even got to sweep the floor neat on a lot of it. Dust aint much a deal.
I open the walk door to the building. I cut the fan down some, it was really too much. As I mention the pic isn't complete, I put filter in front of it after the flashing. 1 hp motor. I open the walk door on the building. I can heat on the building side, blaze the wood stove.
