Welding exhaust options/opinion

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I am a hobby welder (mig, tig, stick) and am just starting out with my setup.  Below is a picture of my welding table.  You can see my current ghetto temperorary exhaust system.  Obviously this is very non-directional and pulls out heat along with the fumes.  It does work since the fumes are clearly drawn into the fan.  However, it's time to upgrade.I am thinking of installing the fan in the second picture in either position demonstrated by the red circles. I am thinking the higher position may be better since there will be a more gradual bend in the ductwork.  I can fabricate a hood to focus the draw.  I realize i will have to crack the door to get an air flow.Total cost will be $200 or less.  Any thoughts?  Fan Diameter (in.) 14 Air Delivery (CFM) 1,400 Volts 115 Speeds (qty.) 1 Dimensions L x W x H (in.) 16 x 27 x 28 Needs to be Hardwired Yes Amps 2.65 Speed (RPM) 1,100 attached to this:
Reply:Hey caspian,I would opt for the higher location & you need to really examine the exhaust flow as there is no need for a "turbine" fan. I do like the louvered type, although I would consider a 10-12" rather than a 14" w/1400cfm draw. Sometimes, excessive draw will affect your shielding gas & cause porosity in your welds. I have a small squirrel-cage fan w/4" adj. duct above my TIG table that has an 850cfm draw & does a great job & also draws the SMAW smoke nicely. I have the duct tube so I can adjust the direction of draw downward for the TIG table or up for the larger welding table about 8' away. If you get a multi-speed louvered fan, that may do the trick as far as reducing your loss of heat. Just some fodder to consider.Denny Attached ImagesComplete Welding/Machine/Fab. ShopMobile UnitFinally retired*Moderator*"A man's word is his honor...without honor there is nothing.""Words are like bullets.... Once they leave your muzzle, you cannot get them back."
Reply:Originally Posted by yorkiepapHey caspian,If you get a multi-speed louvered fan, that may do the trick as far as reducing your loss of heat.Denny
Reply:Definitely use the higher location - moves the fan away from your shielding gases, gets the motor more out of the way of grinding dust, and the fumes in my shop like to float at ceiling level anyway.
Reply:The chosen upper location will likely have the window header and you don't want to cut through it. I'd move some stuff on shelf shelf or move the fan above the tool box. Another option would be to remove the window and put your fan it it's place.With the fan shown your motor is cooled but the air moving through it... you'll eat motors with welding smoke. Bladed fans and squirrel cage fans will load up with dirt requiring maintenance.  I'd use a centrifugal fan as they are very tolerant of dust, grit, and even chunks, often use a smaller hole, and can move more air at higher velocity.
Reply:All fans eat heat.I bought a Harbor frieght wood chip exhaust fan with a hose kit.   I needed to add a variable speed controller.  It does the trick for me.   Garbage can lid for a hood, vented out the window.  I hang the "hood" over where I am working because the fumes and stuff rise then get sucked out.In the winter I try to use MIG and TIG instead of stick so I do not fill my shop with smoke and have to open the door.DavidReal world weldin.  When I grow up I want to be a tig weldor.