Frigidaire's FFRH1222R2 12,000 BTU 230V Median Slide-Out Chasis Air Conditioner with 11,000 BTU Supplemental Heat Capability is perfect for a room up to 550 square feet. The slide-out chassis is designed for either window or wall installation. In addition to cooling, this versatile unit also offers supplemental heat capability, providing you with an additional heat source to your main heat source when outdoor temperatures are above 45 degrees Fahrenheit. It quickly cools the room on hot days and quiet operation keeps you comfortable without keeping you awake. Features include electronic controls, full-function remote control with heat, 8-way air direction control and multiple speeds. Plus, the washable mesh filter with clean filter alert reduces bacteria, room odors and airborne particles creating a comfortable environment. This unit requires a special 230V electrical outlet and will not operate with a standard 115V household electrical outlet.