Highly versatile Multi21+ systems, featuring GREE's G10 inverter-driven compressor and eco-friendly R410A refrigerant, are among the most innovative ductless split heat pumps available today. Our advanced G10 inverter technology gives you maximum efficiency to redact your energy consumption. The slim compact design of the indoor unit hangs inconspicuously on the wall and mixes well with most interior designs. Built-in Wi-Fi technology allows local too long-distance control from smart devices with the GREE+ smart app. A universal piping assembly/line-set (sold separately) is required for installation be sure to select the appropriate size. Color: White.