The SRFAN1U requires only one rack space and installs easily in an enclosure or server cabinet. It includes three powerful four-inch 120V fans that should be mounted low in the rack in order to push cool air toward the top. The high-performance fans circulate air at 210 cubic feet per minute (CFM). The 1U tray is constructed from heavy-duty cold-rolled steel that is built to last. The six-foot AC power cord plugs into any NEMA 5-15R outlet.