I am gonna to start a rat colony, I have begun building me a rack for the rats but I have a question about care. I have a room off of my garage, It has no AC in it but It never really gets all that hot inside of it. I was wondering If that would be an ok spot to have the rack or would it be a bad idea with no AC? I really don't want to keep them in the house, I'm afraid they would stink. I have a fan hanging from the ceiling that circulates air and normal summer time temps here are low to mid 90's. Thanks for any help.

Also here is a picture of my setup if this helps. The door behind the rack is the room they will be staying in.