Mentalchild Well-Known Member Sep 24, 2009 #1 im making a grow box and i got 4 80mm fans and i was wondering how many should be intake and how many out take.
im making a grow box and i got 4 80mm fans and i was wondering how many should be intake and how many out take.
stickey Active Member Sep 24, 2009 #2 twice as many exuast as intake, with 4 id put 3 exuast and 1 intake