A split system is made up of two components.
An indoor unit mounted within the room/space requiring air conditioning. Delivering the air quietly and efficiently to the area.
The outdoor unit houses the compressor and expels the heat outside. The two are connected by refrigerant pipes and electrical connections which determines the installation costs.
A split system has been split into 2 parts – one part is installed inside (this part blows out the air) and the other part contains all the mechanical components (it is installed outside).
Both parts are connected by pipe work and electrical wires that are completely hidden.
The advantage of a split system is that the mechanical part is installed away from living areas so the machines are whisper quiet.