Yea I hear that, you can do all you need to with basic fans, and I wasn't about to go and dish out 90 dollars for some rediculous rat-cage unit after all the main idea is to replace the air in the grow room every 5-10 minutes right? So why not do it at a fraction of that price Hmm oh but wait you have one? Is it the one that sucks air in or shoots air out? Cuz I would think if you have one of those pumping fresh air in you wouldn't need another fan, just simply cut a hole near the top of your closet (The idea being that hot, used air rises) or install a vent, I'm not sure if you have to keep this closet lookin' pretty (Is it in a family place?) Anyway happy growin' man I can't wait to see your designs persued and be sure to let us know what strains you grow!

Cheers