A split air conditioner consists of two main parts: the outdoor unit and the indoor unit. The outdoor unit is installed on or near the wall outside of the room or space that you wish to cool. This is the most cost effective option for cooling a desired area of your home.

A ducted air conditioning system differs from a split system in that the entire unit is concealed, usually in the roof space of your property or housed unobtrusively outside the property. The cooled air is then directed to multiple rooms or zones within the building via a system of concealed ducting.

Cassette units work the same way as wall-hung split system units, with the difference being that cassettes are installed into the ceiling instead of on the wall. The indoor unit itself sits flush to your ceiling and distributes conditioned air through two, three or four sides of the unit.