I have a setup like teankisi's, a window in front of the torch with an exaust fan in the top of the window. I don't have a box around the work area like that. Is it necessary to have that if the air goes right out the window? Everything I've been reading on here seems to say I need a hood, but I didn't think I needed one if I had an exhaust fan right above the torch going out the window. Have I been stupid in thinking that? Your opinions would be appreciated. Thanks
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