Thanks Jeff. I am really pleased with how this booth works. I am using two marine bilge blowers to remove the fumes and overspray. They vent to the outside world through 2 - 10'L x 4"W flexible marine hoses that are fit into a window insert. My booth is 8'W x 8'L x 7'H which is approximately 450 cubic feet. My blowers each move about 450 cubic feet of air per minute (i.e. 900 CFM combined) which seems perfectly adequate for my usage with an HVLP gun. Intake is via an opening in the booth covered by two 20" furnace/AC filters. The exhaust port is also covered by two 20" filters and behind them is a 30" x 20" (guessing on dimensions there) charcoal filter.

Ray, the gun you see is my cheapo primer gun. For real painting I use a Devilbiss SRI HVLP gun. Very nice quality hardware and almost impossible to get poor results, particularly if you follow the infamous David Reid "reduce it 200%" rule.

Here are pics of the bilge blower used as well as the exhaust fan assembly.

Gee David, more power to you. I would just as soon reduce my exposure to this toxic stuff, and that includes cigarette smoke. Our lungs are pretty sensitive and damage to them is cumulative.

Antony