Yeah, you're right more supplied air, we didn't need this to, but the bride left it so I'll put it up.
Supplied air pump in lower level closet in the house, I use the paper hood style, nice and light and cool.
Supplied air line going through the wall underground out to the shop
1 x 6 in booth caulked and bolted wall
1 x 4 caulked and lag screwed to the wall, keeps the water from getting under the osb, works good always stays like that.