Quote Originally Posted by mearsglassworks View Post
I have a small dayton squiril fan that i use when blowing glass at art fairs. It is a 6in and has a 6 inch duct and register boot for the hood. I would try and find something like that and then use an old stove hood. I got an old stove hood for free and gave it a high temp paint job and cut a 10inch hole in the top to vent over my lathe. great good size hood for free and 5 bucks for a can of wood stove paint. My little dayton pulls a decent air flow for it's small size. It's the same fan the grow stores sell for venting indoor gardens about 200$. this system would control the air flow direction much better without having a giant fan.

I have never been a believer of the attic fans, they pull a decent cfm when not restricted but when hooking up to duct work for a REAL ventilation system a squiril fan is the only way to go. Thay are made to be run under static pressure and will pull a much better suction through a hood. Attic fans are not made to be run under a restriction or pull a suction. Furnace fans is what i use for a shop(hvac guys get used ones for free). they are made to be run with resistance, actually if there isn't enough resistance it won't pull to it's full capacity and will burn out the motor.

this is similar to mine

http://cgi.ebay.com/DAYTON-PERMANENT...item2c5896f0ae

mine has a sealed motor, a got it from a welder who said it was used in the GE factory for venting fumes when welding indoors and could handle some heat. I use it as a temp but did run it daily for about 6 months when i was inbetween shops and it held up. just get a 6inch duct collar and screw to the intake and duct from there. my fan is burried in the garage but if ya need let me know and i'll did it out for a model #.

great looking shop man, i saw it at the glassroots and wanted to check out the inside but i never saw you when you had it running.

You could of come knocked and said hello, I had the back closed up most of time since it was so cold. Next time you see me dont hesitate to check it out. Thanks for the advice on ventilation, its def still a work in progress @ this point. Just went with attic fan since it was easy, cheap, and fit the vent hole that was in the ceiling perfectly. But I wanna be safe and not affect my health for sure!