Join Date: Sep 2001
Location: dallas, tx., usa
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I'm not sure if this will help you, but I had good luck cooling my data closet simply by using low voltage computer fans, which are cheap, pretty efficient and relatively quiet. There's even a website or two that specializes in selling computer fans that are super quiet, if that's one of your concerns. Watch out, though, usually quiet comes at the expense of rpms.
The way I did it was I had several dead power supplies lying around, gutted everything but the fans (or maybe I installed new ones), and then tapped the wiring harness to the computer that was in there. I also used free-standing computer box fans, again tapping the wiring harness of the computer. The wiring wasn't necessarily pretty, and watch your fingers on the free-standing fans, but it did lower the temperature of the closet significantly.
Place the fans in such a way so that the flow is across or through your components always in one direction from intake to exhaust.