I am personally beginning to think the "work station" concept (negative pressure booth) of hood/vent is best... See second picture in this thread for example of "work station"....
http://www.lampworketc.com/forums/sh...48&postcount=1
Also have come to believe anything less than a 500CFM fan/blower is a just a joke and one is fooling ones self.... Also one should use 8 inch or larger vent duct with a minimum of turns. Best way is to have exhaust go up and out wall with one 90° turn if possible. Range hoods just don't get it as far as I am concerned. They have no side "curtains" (partitions)to direct air flow, and people tend to mount them to high. They should be no more then the top of your head in height (just high enough that you don't hit them while at work).
Also just as important as fan/hood combination is make-up air.... If you don't have make-up air, the booth/fan is for nothing as you will have no air flow... So make-up air is the other 50% of ventilation.
Dale
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Vendor-Artist-Studio-Teacher Registry
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San Francisco - A Few Toys Short of a Happy Meal