Cool, but is your fan/filter combo inside your tent? I am new to growing indoors. I didn't think I would have room for all that.I have a grow closet similiar in size to yours, mine is 33"x33"x5ft tall.I have a sunleaves windtunnel 4" inline 2oocfm fan with a 4"x12" phresh carbon filter and it does the trick perfectly for that size cab.My passive intake hole is cut to 6" and creates plenty of airflow with the fan pulling air thru the filter.