Go to you nearest pet store and purchase a "cat flap" cat door?.............
I've been trying to train Toonces on server maintainance but he's a little slow.

I've got 4 Intel SR2300 servers w/ Dual Xeon chips and RPS on each. Got 2 SmartUPS 3000XL, HP ProCurve 4108 w/ 4 10/100 24 port mods and 1 8-port Gb mod, Quantum SuperLoader, small router, all in a rack mount. I also have an old PII Novell box. Our phone system is in the same room and produces some heat.

My biggest prob is on weekends they shut the A/C down in the building. During the summer it gets probably over 85 in the office. Even pulling air from outside is gonna leave my servers in some elevated temps. But forking over 10,000 clams for a dedicated A/C unit is a bit steep.