Jun 26, 2017 #1 Why Doe New Member So I have a 4" duct fan brining fresh air in but I'm concerned when I switch to 12/12 light will get in. can you guys think of any solutions? The only thing I can think of is putting some sort of filter on it.
So I have a 4" duct fan brining fresh air in but I'm concerned when I switch to 12/12 light will get in. can you guys think of any solutions? The only thing I can think of is putting some sort of filter on it.
