Designed to cool and heat rooms up to 1,000 sq. ft. with variable speed inverter - ensuring this is achieved quietly and efficiently, 19.0 SEER Rating - DoE Certified: helps to save a considerable amount for heating and cooling, Low temp operation: operates at temperatures as low as -4F/-20C, making it ideal for scenarios that require year-round cooling - while the heat pump makes it a cold weather option, Refrigerant leak detection: the unit will automatically shut down in the event of a leakage, Indoor unit, outdoor unit and pipes come pre-charged with R410A refrigerant