no, your fan does not have to oscillate. the main purpose of that fan is to simulate wind and help your stems grow nice and strong. as long as it hits all of your ladies you're fine.

as far as ventilation, you want to exchange the air in your grow room at the minimum of every five minutes. (every one or two minutes is ideal, i think.)

to find cubic feet you use l x w x h. so you would have 2 x 4 x 4 or (2 x 4) x 4= 32 cubic feet. so your 225 CFM fan is plenty of sufficient for your needs.

the intake hole is another thing. you want to create a negative pressure in your cab. you do this by exhausting more air than you can take in. this negative pressure draws in fresh, 02 rich, cool air.

i guess this is normally done with smaller intakes than exhausts. i've read all kind of opinions on the subject. you might have to play around with this.

good growing!


-shake
headshake Reviewed by headshake on . fans and venting I have a small grow cab.2'wx4'lx4'h with 20,000 lumens from t5 fluro's.does my fan for blowing on the plants have to be oscalating considering the small space or can it be a stationery type fan. Also my venting is from a 6" inline fan with 225 cfm and a passive intake hole 6"- is this too muchcfm for my cabinet or does this really matter? :twocents: Rating: 5