This Fan tray is designed specifically for RackSolutions' Rack 151SW. The panel installs directly to the ceiling top panel on the rack, using six 120mm fans to exhaust hot air equipment inside. The six fans combined have an airflow of 576 CFM that assist in accomplishing maximum cooling efficiency and achieving your PUE goals. With the help of the ball bearings, each fan operates at a speed of 3000 RPM with a noise level of only 47 dBA.