US Patent 7295444 Delivering chilled air to components in a hardware cabinet

A hardware cabinet includes a chassis that is designed for mounting multiple heat-generating electronic systems and a door that allows access into the cabinet. The door has a solid face that extends from the top portion of the door along the majority of the door's length. An opening formed in a lower portion of the door allows chilled air to enter the cabinet. The chassis is structured so that, when electronic systems are mounted in the cabinet, a plenum is formed between the door and the electronic systems. The plenum allows air entering the cabinet to rise between the door and the electronic systems.