Frigidaire 18,500 BTU 230V Median Slide-Out Chassis Air Conditioner w/ 16,000 BTU Supplemental Heat Capability, FFRH1822Q2 Median air conditioner with supplemental heat capability requires special 230V electrical outlet (Unit will not work with standard 115V outlet) Slide-out chassis for either window installation (window mounting kit included) or wall installation (8" maximum wall thickness) 18,500 BTU cooling capacity / 16,000 BTU supplemental heating capacity for a room up to 1,050 sq. ft. with dehumidification up to 5.5 pints per hour Supplemental heat capability provides an additional heat source to your main heat source when outdoor temperatures are above 45F Modes designed to save you energy and money include Auto Cool, Sleep and Energy Saver