@ dmwardjr
What about a hole(or two) in the closet door (18x24) and set it up with an a/c filter assembly like an a/c air handler closet.
I've considered that. However, after standing in the closet with the door closed, I could tell it needs some cold air coming into it. Having more ventilation just want cut it.
I'm about to head to Lowe's to get an AC unit for the mining/data closet.
Sorry if I don't respond for a while.