I am in the process of building a new indoor enclosure for my 5 yr old sulcata. He is outside most of the year but as long as I can still carry him inside during the worst part of the winter I would still like to do that. It will be an enclosed enclosure to help hold in the humidity and heat. The size will be 8'x16' with a hide. In the hide I will be using an oil filled radiator that I now use for his outside hide.For he rest of the enclosure I am not sure what to use heat panels, another oil filled radiator, or CHE. His outdoor enclosure is 70'x36'.