Unical YON is a multi-split air conditioning system which can be installed in various configurations, to meet the specific needs of residential and light commercial applications. The air conditioning system comprises an outdoor unit, which accommodates the refrigeration system, and indoor units, which can be of various types, for example wall-mounted, floor-standing, or ducted. The system is available with different refrigerants, R32 and R290, and different power ratings, to meet the specific requirements of the installation.