TERRA18HP230V1AO 18,000 BTU TERRA Ductless Split Outdoor Unit. The Terra Ultra Efficient Ductless Mini-Split Heat Pump System is the most energy efficient system ever created from GREE. It provides unrivaled comfort, quietness and most importantly energy savings. The Terra outdoor compressor section is powered by a twin-rotary compressor with Gree's G10 Inverter technology. This inverter technology with eco-friendly R-410a refrigerant saves you energy, reduces outdoor noise and keeps the room temperature steady by eliminating the constant starts and stops of conventional systems. The terra indoor cabinet is designed to be a comfortable fit for virtually any living space. A line-set (sold separately) is required for installation - be sure to select the appropriate size. G10 Inverter Technology Ultra High Efficiency 27 SEER Energy Star Qualified Photocatalytic Air Filter 3 programmable Sleep Modes 4-way Airflow operation (Swing) Waterfall heating airflow 7 Fan Speeds-from Mute to Turbo Gold Fin Condenser Photocatalytic Filter I-Feel Automatic Function Low Ambient Cooling to 5a°F Optional GREE Wired Controller Low voltage start-up Intelligent Defrost 5yr Parts Warranty - 7yr Compressor Warranty