garage ventilation

[Amofred9]

In my little one's garage, I installed a bathroom exhaust fan after read a review from hvaclifehack. Due to my flat, insulated ceiling, the fan is located in the attic space on top. The fan has a one-way air valve/flap, and the exhaust point at the gable has another. This prevents cold air from entering. A duct is just an abs pipe surrounded in insulation to prevent heat loss through the ceiling in winter.

[MAC702]

If you are using an exhaust fan, from where is the make-up air coming into the space?

[Sberry]

I got a couple ways but this is a stick weld booth.

[Auto_Tech]

I've switched to a 3M Speedglas Helmet / Respirator -- the only problem I'd point out is visibility out the viewing area is not as clean / clear as Miller's Digital and Lincoln's Viking advanced helmets.