Recent content by HansKloss

not quite, for 6" exhaust (Pi x r x r, 3.14 x 9 = 28 sq. in) you would need around 56 sq in. intake. it could be 7 x 8 square cut out.

passive intake should be 2 x size of an exhaust.

oops, as a new member I can't send private messages yet. Here's the link you should read: Ventilation 101 - International Cannagraphic Magazine Forums it's looooong, but it's a must. good luck! hope I didn't violated any rules by posting other forum thread, but hey, we are here to learn.

Hi Token, I'm in the process of building my own box and I have read a lot about proper ventilation. Active intake is a NO GO: fans mess up air circulation. as far as passive intake, they should be twice the size of an exhaust. I'll PM you great link that will answer many questions regarding...