I am collecting ideas for outdoor enclosure for cold winters in Chicago. I have a couple years (i think) before I will need one. I don't plan on keeping him outside in the winter, but would like to be able to put him out on warmer days for some rays and would like him to have a warm house to go into if he gets to cold, until I come for him. Now my questions is this. Has anyone used the under floor heating system they have for your home? You can install it under stone or ceramic tile, carpet and I think cement floors. I am not sure if you can install it under wood floor. It is run off of the main electrical box. I would also use a second heat source over head. This would all be in a double walled insulated small dog house style house. The door I am looking for, if anyone has seen one, automatically opens either by stepping on a plate or by walking through a infrared beam. Any thoughts good or bad would be appreciated.