I'm in the process of planning out a stealthy-ish grow cabinet. Right now I see the dimensions as being 32" X 14" x 20" with a 4" pc fan below plant level for a fresh air draw, possibly on a timer and a small battery operated fan at plant level just to keep the breeze across the leaves. Haven't quite decided on my order control but once I have that set do you think I need another fan for exhaust or will there be enough air flow for passive ventilation? If I do need another fan do I need to run it non-stop? Once I actually get everything sorted out I plan on starting a journal from build to bud. Any ideas or criticisms are more than welcome. I am using CFL's for light so....