Raising Electronics Rack Mount Fan - Solid, Versatile and Premium Quality, protect rack mount equipment from overheating, performance issues, and shortened lifespans.-----This 1U rack mount cooling unit with 4 fans is designed for applications that requires high volume cooling inside server or network cabinets. -----With an easy adjust control log, this temp control auto server fan will significantly improves the heat in your system. -----It mounts to any standard 19' installation cabinets and racks to provide a maximum airflow in your mission critical server systems. -----It can be mount either at the Top or Bottom of the your cabinets or racks. Also, if you would like to mount it in between your equipment, it is going to perform well too. -----The air flows from the unit bottom to top. Operates at a quiet noise level(from 42-48dBA) making it perfect for the server room or within your office space.