Cassette air conditioners are ceiling air conditioners and are one of the main types of inverter split systems. Cassette air conditioners work like other wall-mounted split system units. The difference is that the cassette systems are mounted on the ceiling, not on the wall. The inner unit itself is on the ceiling and distributes the conditioned air through two, three, or four sides of the device.

The external device is mounted on the outside, in the same way as a conventional wall-mounted system unit.The powerful cooling of a cassette unit, along with its central placement in the ceiling, makes it highly suitable for large halls or living rooms.