So I'm going to start breeding rats in the spring and I'll be doing it in my shed in my backyard which stays the same temperature as it is outside pretty much year round. Since I live in central Illinois where it can go below zero in the winter and well above 100* in the summertime, I was wondering if I should come up with some kind of climate control for the shed. I've already decided that if it came to it I could insulate the walls of the shed and run electricity out to it and have an air conditioner in the summer and a space heater in the winter to keep it at optimal temps, I'm just wondering what the optimal temps would be to keep them first, alive and healthy and second breeding consistently.

Thanks,
Greg