I’ve seen a lot of mining rig cooling solutions out there, but this takes the cake for ingenuity.
http://middlecoinforum.com/showthread.php?372-Hashor-s-Cooling-setup-42MH-with-no-AC
I will try this in the coming weeks as I think it’s the best design I’ve seen yet.

And another guy on taking the same approach

http://middlecoinforum.com/showthread.php?356-Using-a-useless-room-for-a-hobby-My-own-little-data-center-LOL