So, I added another 2'' intake, everything runs well, but not well enough. Temps. in closet stay, consistently, 22 degrees higher than whatever the temp outside of the room is. 80 degrees in the closet? my a/c'd room needs to be at 58. BAH!

The electrical cost to maintain this is out of the question, especially considering were about to be in July in about a week. Any suggestions? Bigger exhaust fan? More passive intake? Anything?