The definition of a split A/C unit is a type of air conditioning system that is composed of two parts: an outdoor unit and an indoor unit. The outdoor unit contains the compressor, condenser, and expansion valve, while the indoor unit contains the evaporator and fan. The two units are connected by copper tubing and electrical wiring. The outdoor unit is responsible for cooling the air and the indoor unit is responsible for distributing the cooled air throughout the space. Split A/C units are ideal for cooling large spaces, such as commercial buildings, because they are more efficient than traditional window units. Additionally, split A/C units are quieter than window units, making them a great choice for residential spaces. Split A/C units are also more energy efficient than traditional window units, helping to reduce energy costs. Finally, split A/C units are more aesthetically pleasing than window units, making them a great choice for any space.