1. Indoor unit: a fan draws hot air over a heat-exchanging coil, through which cold refrigerant flows. This absorbs the heat from the air and cooled air is blown into the room.
2. Pipe work: the refrigerant circulates through the units and takes the heat from the indoor unit to the outdoor one.
3. Outdoor unit: the refrigerant gas passes through a heat exchanger and the heat absorbed from the Indoor Unit is dissipated with the aid of a fan. This process cools the refrigerant which becomes a liquid, this liquid is pushed through a compressor into the Indoor Unit where the process starts again.
