I’m doing an overhead “hood”. I haven’t fabricated it yet, but I did purchase a couple of parts already. My ducting is flexible and I plan to have it mounted floating above (so I can reposition or move it out of the way whenever I need). The hood itself I envision will be similar to the shape of what you see above a kitchen cooktop, only smaller and shop-styled (home made).
Here’s my fan:
And the ducting:
All in for $200. The hood itself I’ll be making out of some scraps and hung from the ceiling in a way that is close enough to the table to be effective, yet highly moveable and positionable (x, y, and z) for whatever is thrown at it.
I’m not cutting a hole in my walls or garage doors, but I plan to have one of the doors open the 8" required to stick the hose out. We don’t really get much snow, sometimes zero; garage is insulated and stays relatively warm. If it turns out to be too cold I’ll build an 8" blocker out of a sheet of plywood to run across the open space to keep the wind out.
I’m also making four moveable walls out of welding curtains with some metal frames. This will help to keep sparks inside the zone, and also channel more fumes towards the suction of the hood. These are what I purchased:
To look something like this when I’m done:
