A system for providing ventilation to rack-mounted computers includes a plurality of rack-mounted computers on a plurality of motherboards each having a front end near a work space and a back end, a plurality of fans mounted near the back end of each of the plurality of motherboards and adapted to deliver heated air from the computers to a common warm-air plenum, and a plurality of motor controllers coupled to the plurality of fans and adapted to maintain a substantially constant exhaust temperature for each of the fans.