Patent ID: 8544289

Claim:
A cooling system comprising: an equipment rack configured to support one or more pieces of rack-mounted equipment within an interior of the equipment rack, the equipment rack including a front to receive the rack-mounted equipment therein; an exhaust fan unit mounted on an equipment rack of an enclosure, the exhaust fan unit including a fan and an exhaust duct coupled to the fan, the exhaust fan unit being configured to direct air heated by rack-mounted equipment supported by the equipment, the exhaust fan unit including a temperature system to detect a temperature of the interior of the equipment rack, the temperature system including one or more sensors positioned within the interior of the equipment rack; an overhead plenum in fluid communication with the exhaust duct of the exhaust fan unit; a cooling unit in fluid communication with the overhead plenum, the cooling unit including a heat exchanger and an exhaust assembly, the cooling unit being configured to direct cooled air to the front of the equipment rack; and a controller operably coupled to the exhaust fan unit, the controller being configured to control the operation of the exhaust fan unit in response to temperatures detected by the one or more sensors.