Exhaust Fan suggestions.

[Bob Slater]

Building a welding room in the shop. It is about 170 square feet. I am really not wanting to breathe the fumes or smoke if I am welding aluminum or stainless. (Taking a welding course at the moment...new world opening up)
Anyway, I want to rig an exhaust fan with a cone over my table. So I figure I will need some ducting to get the air out of the room. I have looked into used squirrel fans. One has a 1/2 HP motor and claims to move 2800 cfm.
What do you guys think of this one? Would it be easy to hook up to ducting? Would another type of fan be more desirable?

http://cgi.ebay.com/ws/eBayISAPI.dll...m=270374955200

Also, I plan on using this room for general toxic stuff and maybe some spray painting. I don't think a full explosion proof electrical system is in the budget, but if you move enough air, how real world safe might this be for light duty spraying?

[Rollie Meyers]

I would not use that unit in the link you posted, any debris you produce is going right across the motor.Try something along the likes of this, http://www.grainger.com/Grainger/wwg...peOf=&x=75&y=5 a used equipment dealer, scrapyards, fleabay or others would be a place to look as the new price is plenty enough to choke on. Any blower needs the motor seperate from the area where the air is being exausted & filters are not good enough to rely on for keep things clean. The example shown is not the only choice, but that type is used used for rest. hoods & if you have ever seen one in use they can be nasty if they don't have a annual or bi-annual cleaning...

[David G Baker]

I have a over the stove type vent fan that I plan on using over my welding table. Got it at a garage sale at a good price. This will work for welding but not for painting.

[Bob Slater]

I would not use that unit in the link you posted, any debris you produce is going right across the motor.Try something along the likes of this, http://www.grainger.com/Grainger/wwg...peOf=&x=75&y=5 a used equipment dealer, scrapyards, fleabay or others would be a place to look as the new price is plenty enough to choke on. Any blower needs the motor seperate from the area where the air is being exausted & filters are not good enough to rely on for keep things clean. The example shown is not the only choice, but that type is used used for rest. hoods & if you have ever seen one in use they can be nasty if they don't have a annual or bi-annual cleaning...

How do you think these work with the snow we get in Canada. I have had a foot and a half on the roof a few times
. Does that work similar to this one? (Ie a cage)
http://www.delhi-industries.com/Catalogues/ss43.pdf

[Scott T Smith]

Bob, for welding fumes you want a ventilation system that moves a lot of air fairly slowly; otherwise you will have problems with the gas shielding blowing away when you are using a TIG or MIG (non flux-cored wire).