I operate a commercial sculpting business.  We have two areas that we
need to exchange air in .  In one area we spry paint, in another, we
pour two part urethane foams.  Our question is?  How many CFMs do we
need to exhaust for each room.  Is a system that exhausts 1500 CFMs
per minute too small.  We have calculated that if we used a mechanical
set up to exhaust 1500 CFMS per minute, we would have a complete
exchange of air in Two Minutes in one room and Three minutes in the
other.  WE wear the correct filters and masks but still we want to do
this right