OK, the budget is practically nill for a start.  I inherited a network some time back from my former manager in IT which is composed of several servers external to the rack, 4 APC UPS1000 batteries, 2 HP rackmount g5 servers, 1 KVM, 3 switches (2 of which are rackmount, the 3rd is just housed in the rack on a shelf), a dsl router and a DLT drive. Everything but the external servers is in the one 19 inch rack that's as old as moses.  I have no blanking panels or exhaust fans currently for the rack.  The one switch which is not rackmounted gets EXTREMELY hot very quickly unless I keep a fan on it constantly. Most docs that I can find online regarding cooling deal with multi rack server rooms.  I have a very sparsely populated, single rack that needs a better solution for cooling. I've read about using exhaust fans and blanking panels for airflow to do the cooling, but I am lost as to exactly put that into action in my setup.  Cheap is the main thing with my bosses, so I want to go at this with a good plan up front so we don't waste time and money with experimentation.  Any direction is very much appreciated.

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