You can move the temp probe if you want but not to far. The problem is if you make it to hot on one side to warm up the other side then you still only have 1/2 of the cage that is usable.

I have 3 rooms (large rooms) each is heated to just below the cold side temp. But some of my racks loose heat fast so I put insulation on the tops of the 4' and 8' cage stacks and insulation around all the cb110 and cb70 racks in the boa room. In the BP room I just insulate the bottom shelf since that room in very warm and safe, and I just worry about the floor radiating the cold temps.