ASL Solutions Deluxe Insulated Dog Palace with Floor Heater - Large 2" - 4" of real foam (Styro/EPS) insulation in each and every panel 38.5" H x 31.5" W x 47.5" L Easy pass through, self-closing, well fitted insulated door (not a "flap") Dog Palace sized for medium to large dogs (Labrador through small St. Bernard) Self-storing window panes easily reposition from winter's closed position to summer's open cross ventilation position without tools