She ain't pretty, But works like a charm. Because my house is on the water,can't have a full depth basement. It sucks,but can't spray trucks in the garage in the winter.
I don't remember what mill the plastic is,but it's thick.
When you kick this baby on,it sucks the walls in.
It's like a wind tunnel in there when the door is closed.I use two furnace filters stacked.There's only one in this pic,had to use one in the furnace the other day.
If you make one of these be sure the motor is made to operate in fumes.
Hate to see your house leave the foundation!
Also be sure to cover fan when not in use.Or it will fill your new booth w/dust.
Well I hope this helps.
FGD