Energy efficient split system air conditioner allows unit to reach and maintain set point quickly and operate in 0° to 115°F ambient temperature. Unit automatically switches between cool and heat and easily mounts against a low wall or on ceiling. You can program a sleep and 24-hr. timer when you went your unit to turn on or off. Oscillating up/down louvers allow continuous air sweep. Will auto restart after power outage. Provides ultra quiet operation and has dehumidification and auto-fan modes. Uses environmentally friendly R-410A. New installations require refrigerant line set, sold separately. Split System Heat Pump, Indoor/Outdoor Indoor, Outdoor, Mounting Type Wall, BtuH Cooling 22,000, Reverse Cycle Heat BtuH 27,600, Voltage 230/208, SEER 21.5, Hz 60, Phase 1, Min. Circuit Amps 19, Max. Time Delay Fuse Amps 20, HSPF 10.2, Dehumidification 6.3, Operation Mode Heat/Cool, CFM High 659, CFM Medium 530, CFM Low 436, Indoor Sound Level dB 33 / 39 / 43 / 46, Outdoor Sound Level dB 54, Filter Type Washable, Indoor Width 46-7/8 In., Indoor Depth 10-3/8 In., Indoor Height 13-5/8 In.