Intelligent thermostatic control, works with 22' or deeper BRK, MBRKIntelligent cooling for laminate racks. Intelligent thermostatic control Mounts in top of rear access panel Fits RK/BRK and RDR Series 100 CFMDesigned for cooling laminate racksMounts in top of Rear Access PanelRated for 100 CFM in free air110V input voltage(4) Fan guards included