Looikng to make a light trap/stop light leaks from a 12' max fan with the least amount of cfm loss possible..
The fan is between two flower rooms, sharing an ac.
I looked into dust shrooms but they are pretty expensive, but that might be the best route.
I would definitely need two, because I looked at one and it didn't quite do the trick...
Dark room vents seem like they would cut down on flow quite a bit....
Also can anyone can interpret this chart from can fans site? I am not sure what "wg" stands for?
Is it "static pressure" or inches of ducting or something like that?