This is a regular size heated house, measures 18"x18"x24"H on the outside and 13"x14"x13"H on the inside. The floor is vinyl with removable carpet on top. All interior surfaces are covered with carpet. The floor, walls and attic are insulated. The house is heated with an infrared bulb installed in a recessed light fixture in the ceiling so it is out of Kitty's way. There is an adjustable thermostat right inside the access door. The bulb only comes on when heat is needed. The front of the house opens for easy access and cleaning. House has a square window and a Trixie Cat door. The siding & Trim are left natural and finished with a clear penetrating sealer. Also includes a Heated Pad that is designed for outdoor use and is safe even if it gets wet.