yeah it is controlled i took a look at his sytem setup today it was real nice unfortunatly i was not able to get any pics. This is how it is the cage i like this: for the cage floor he has a 1/2 in. thick. with a series of drilled holes down the length of the cage floor with the speacil heat coil run through these holes. that takes care of the overall cage heating. now for the perches he drilled holes in the side paneles of the cage for the coil to inter and to exit with the coils going trought a series of three fiberglass branches. all of this is conected to a thermostat like a normal uth sytem would be. i will make sure i get pics next time i go.