DejaVuDejaVu
Member
With a little help from a few forum members I have decided to get a 6" and run it at lower speedTry and keep the ballast outside your growspace to minimize heat, I would have thought a 4" fan would be fine. I've got a 9" inline fan in a space 12' x 12' x 8' and the negative pressure is huge, very hard to shut the door.