1974 Dodge Dart Sport rebuild

Thanks Neil, for the info. I have done the air flow calculations for the booth using the cubic feet of the booth and the CFM of the fans. The fan CFM is supposed to be 3 times the cubic feet of the booth. That's not happening! LOL The booth is 24x14x13.5 so 4,536 cubic feet and the fans equal 6400 CFM unrestricted. Once the filters go in I will be happy if I get 5000 CFM. It is what it is, so I will work with it. Sprayed a few cars with only box fans going in the windows so this is an UPGRADE! Progress I guess. I agree with you that if there is not enough air coming through the filters, the air will be sucked in through every little gap there is. That would not be good! I can always add more fans, but that adds $$$$ and the "making money" part of this resto has long since been sucked out of the booth!