A Close Control Unit (CCU) is designed for applications where humidity/climate control, high precision air conditioning is essential, including data centre cooling, medium and low density server environments, telecom switching stations, medical operating theatres and clean room environments.

New energy and performance standards require air conditioning systems with precise close control to achieve high reliability, better humidity and temperature control as well as part-load efficiency. These features are crucial for areas where close control units typically operate; i.e. in data centers, mobile phone network exchanges and server rooms, where cooling is business-critical.