Knurr CoolLoop is a data center server cooling solution that can be operated as both an open and closed system. The system can be set to either directly cool the adjacent cabinet (closed system), or to supplement the data center cooling (open system). A system of valves ensures that the correct cooling level is provided for every server. The Knurr CoolLoop is a water-cooled cabinet unit for side mounting on server cabinets. It is a closed unit with warm air suction from the rear and cool air expulsion at the front – blown vertically over the entire height of the cabinet.