This is a large size heated Cedar house, measures 21"x21"x25"H on the outside and 16"x17"x15"H on the inside. The floor is vinyl with a heated cushion on top that is covered with a Corn Flower Fabric. All interior surfaces are lined with Cedar. The floor, walls and attic are insulated. The house is heated with a 60 watt heat emitter that is recessed into the ceiling and covered by an aluminum grill for Kitty's protection. This house has the upgraded thermostat that you can set and forget. And there is a thermometer on the back wall. The same thermostat controls both the heat emitter and the heated cushion. The front of the house opens for easy access and cleaning. House has a square window and a 2 Large Petmate Doors that will fit the biggest cat, one on the front and one on the back. The siding & Trim are Cedar and finished with a clear penetrating sealer.