A multi-split unit is a type of air conditioning system that uses multiple indoor units connected to one outdoor condenser unit. It is also known as a ductless mini split system, and is ideal for cooling or heating a single room or area. The system is composed of at least one outdoor unit and one or more indoor units. The outdoor unit contains the compressor, condenser, and expansion valve. The indoor units are connected to the outdoor unit via refrigeration lines, allowing for individualized temperature control in each room. The indoor units come in a variety of sizes, from wall-mounted to ceiling-mounted cassettes, and provide cooling or heating according to the room’s needs. The multi-split unit has a number of advantages over a traditional HVAC system, as each room can be individually controlled, and it is easy to install and maintain. Furthermore, the multi-split unit allows for greater flexibility in the design of the air conditioning system, as it can be used