So I've been breeding rodents in a room within my garage since mid fall. It's a 12ftx10ft insulated room within my garage. It has it's own ceiling that is insulated apart from the garage itself. Now that it's getting hot in Ohio my garage is starting to bake. Luckily the rodent room isn't as bad as my garage but it's only time before it gets there. I'm looking for ways to cool down the rodent room without being too expensive (window AC unit is a electrcity hog). I've got a box fan in there circulating air and an exhaust fan but it's still warmer than I would prefer.... Any suggestions on a cost efficient way to keep the temps down? Any input is definitely appreciated and if you need any more information please let me know. Thanks.