Perfect Aire 1PAMSH18-SZW-15 Single-Zone Inverter Mini-Split Indoor Unit, Requires Outdoor Unit Model #1PAMSH18-SZ0-15 for Full 18,000 BTU Cooling/Heating System This is an indoor unit only and requires outdoor unit model #1PAMSH18-SZ0-15 to function (make full system) Ductless heat-pump, follow-me remote control, refrigerant leakage alarm and built-in low ambient kit Air Flow (CFM): Hi-440, Mi-390, Lo-280. 3-Fan Speeds (Cool/Heat/Fan). Sound Level (dBa): Hi-42, Mi-39, Lo-31 Full system: 18,000 BTU, 15-SEER, 9-EER, 208-230V, 8.2-HSPF4, 8.0-Heating Amps AHRI Certified (Air-conditioning Heating Refrigeration Institute), cETLus Listed, InverterTek (inverter technology) and Eco-friendly refrigerant