ASL Solutions Deluxe Dog Palace Large Doghouse - Includes Heater and Fan Floor is insulated and raised 4" to provide a dry and warm bedding area Easy pass-through, self-closing, well-fitted insulated door (not a "flap") Self-storing window panes easily reposition from winter's closed position to summer's open cross ventilation position without tools Sized for medium to large dogs (Lab thru Small St. Bernard) 2"-4" of real foam (Styro/EPS) insulation in every panel