RIO18HP230V1AH 18,000 BTU RIO Ductless Split Indoor Unit. The RIO High Efficiency Ductless Mini-Split Heat Pump system is compact, quiet and provides unmatched comfort in any room. The RIO outdoor compressor section is powered by a twin rotary compressor with Gree's DC Inverter technology. This inverter technology with eco-friendly R-410a refrigerant to saves you energy, reduces outdoor noise and keeps room temperature steady by eliminating the constant starts and stops of conventional air conditioning systems. The RIO indoor section is designed to be a comfortable fit in virtually any living space. G10 Inverter Technology High Efficiency (16 SEER) Low Ambient Cooling to 5a° F (208-230Volt systems) Low voltage start-up Intelligent Defrost Intelligent Pre-heating Comfortable Sleep Mode Auto Swing (Vertical) Multiple Fan Speeds Auto Clean Dry Anti-mildew design LED display Self-diagnosis Control lock Fan Delay 5yr parts warranty - 7yr compressor warranty