The Tempest 5000cfm Industrial Cooling Fan is ideal for cooling large areas by delivering a large stream of cool air. This large volume air mover helps to keep areas cool by moving the warm static air to give a cooling effect. This 20" (500mm) portable fan is perfectly balanced on a frame making it an efficient source of portable cooling. The Tempest 5000 is an industrial cooling fan manufactured to the very highest standards, built to withstand the rigours of tough industries.