There are also room AC units that are self contained. They don't require any outside ventilation and I think they're pretty reasonable(under about $400 for a large one).
Otherwise, if you can lower the animals closer to the floor, put in fans for circulation, or even(if it's an attached garage) you could open the door to the house and let the house AC cool the garage(might get pricy).
If you put frozen bottles in the cages the rats might(will) chew on them, so I'd put them on top of the rack(racks right?) or outside the tank up against the glass.
Sometimes in summer my snakeroom gets too warm and I move the snakes from upper bins to lower bins and don't use the upper ones at all. That usually fixes the problem. Sometimes I use a fan too.
Reply With Quote