The heat pump works with a speed controlled compressor and delivers heat and DHW up to 70°C. It can also be used for energy saving surface cooling and for active air conditioning and room dehumidification via fan coils. The controller and user interface are housed in the compact wall mounted indoor unit. It is controlled with the leading-edge Ochsner Tronic Smart (OTS) and can be operated either on the 7" touchscreen of the heat pump indoor unit or using the OCHSNER Smart app.