This extra Large Cat Pod has the same heating system as our more  expensive Handcrafted Houses. It consists of a 50 watt infrared heat  lamp screwed into a recessed light fixture so it is out of Kitty's way.  There is an adjustable thermostat that you can set and forget. The heat  only comes on when needed, also has a 20 ft cord. These coolers are   very well insulated and hold the heat in very well.  Made from an Igloo  or Coleman  120 qt cooler  Pod measures 16" x 33" x 14" deep on the  inside. Will fit 3 to 4 cats. The large Catmate door fits the biggest  cats.  There is a piece of removable carpet on the floor. 

Thermostat controlled heatlamp.