For those of you looking for exhaust fans to use with a spray booth.
I purchased the following portable dust collector fan for my woodshop tools from Harbor Freight.
I paid $100 using a 20% coupon.
The following are anecdotal observations.
I happened to notice it had the same 4in duct connectors that my spray booth fan used. Being curious I switched them out and all I can say is WOW! what a difference.
Using a rattle can I always had to spray in short bursts to keep the fumes from getting into the room. Using this new fan I was not able to detect any paint odor using the rattle can continuously.
If i can handle a rattle can an airbrush shouldn't be a problem.
The spray booth fan is a Grainger exhaust fan rated at 1/20 hp and 365cfm.
This fan is 1 hp and 660cfm.
The exhaust flow never enters the motor section, just like on the Grainger.
I will have to say that it is louder than my Grainger fan.
They also have a smaller cheaper version.
This would be about $80 using a 20% coupon.