Beer Belly
Well-Known Member
I used one like this inline with a 6" duct and filter. Fantech was the brand like my fan but these are very generic and many sizes and brands are available. Look for backdraft damper. They even have powered ones.Yes I'm definitely pulling the air from my garage. What brand of damper did you get? I'm still figuring out what size passive air intake I need to make? My exhaust fan is a 14 inch max fan 1700 CFM it's a beast.
Only open when air is being sucked out. Works like a charm. Just a thought, but with a room your size you could probably place a couple of smaller ones to create better air circulation.