The definition of an indoor mini split is a type of air conditioning system that is composed of two main parts: an outdoor compressor/condenser and an indoor air-handling unit. This type of system is ideal for homes or businesses that don’t have ductwork or where it is not practical to install it. It is also a great option for homes or businesses that want to cool multiple rooms with different temperatures. The outdoor unit contains the compressor, condenser, and expansion valve, while the indoor unit contains the evaporator, fan, and air filter. The two units are connected by copper tubing and electrical wiring. The outdoor unit is usually installed outside the building, while the indoor unit is installed inside the building. This type of system is efficient, quiet, and can be installed quickly. It is also a great option for those who want to save energy and money.