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I misread the dimensions of your grow area. Mine are actually almost identical - 2 1/2'W x 2'D x 4'H, and a very similar setup. I only have one passive intake near the bottom, one exhaust hole near the top with a fan from a broken microwave blowing out the warm air, and a small cheap fan on...

First, I would lower the lights to an inch from the plants. Then try taking the fan out of your intake (or just don't turn it on) to make it a "passive intake". And use only one fan to circulate air around the plants. That exhaust fan looks plenty big enough to suck the warm air out of that...

Thanks Banjo. It does an awesome job on keeping the temperature down. Only a week or so left . . . just 2 plants, here is a shot of the bigger cola . . .

Thanks for the info on the whole AC/DC thing Kludge. I've read a bit on Tesla too, he was a pretty brainy dude. And thanks for the tip on the case fans ChatNoir, I'll get one after this grow is complete (assuming the house doesn't burn down first:eek: ). It's not too loud though, probably no...

Thanks Aurora, I'll check it out. :)

Thanks King. I just figured since it had a fairly high CFM rating for such a small fan, that it might work. Guess I didn't really think about them not being designed to withstand air pressure differences.:D

We had a microwave that died a few years ago, and today I decided to experiment. I pulled out the fan, connected the two wires coming out of it to an old lamp cord, plugged it in, and voila, it works! I've been looking for a cheap exhaust fan for my grow cabinet (4'H x 2.5'W x 2'D) and I'm...