With its slim-line design the Digital Inverter high-wall unit is ideal for offices, restaurants and other applications where elegance is required. High Efficiency Twin Rotary Inverter Compressor. Replacement Technology (R22 & R407c) High performance operation, using digital inverter control system Enhanced filtration system TCC Link remote control (optional) Auto louvre mode allows optimum air distribution Infra-red and wired controls available With its slim-line design the Digital Inverter high-wall unit is ideal for offices, restaurants and other applications where elegance is required. The units are suitable for use with either new R410A refrigerant pipework, or indeed can be used as ‘replacement technology’ enabling the re-use of existing R22 or R407c pipework.