This is a med size house measuring 20"x20"x27"h on the outside and 14"x15"x13"h on the inside. The floor is VINYL with a piece of removable carpet on top. The interior walls are lined with Cedar. The floor, walls and attic are insulated. The house is heated by a 50 watt infrared bulb installed into a recessed light fixture in the ceiling so it is out of the way. There is an adjustable thermostat mounted inside the door, the bulb only comes on when heat is needed. There is also a thermometer mounted on the inside back wall. This house has two commercial door upgrades made by Pet Safe. The house comes with a 20 ft cord. The front of the house opens for easy access and cleaning. The siding and trim are Cedar and finished the Marine Varnish Clearcoat. Also includes a weatherproof outlet mounted on the back and a heated Stainless steel bowl. The stainless steel construction will not harbor bacteria, does not stain, will not absorb smells, and is easy to clean and disinfect. This 120-ounce, heated bowl uses only 25 watts to keep water from freezing even at sub-zero temperatures. Also includes the heated pad that is designed for outdoor use.