Totally Enclosed Aluminum Propeller Fan w/ Medium Stand - 48" These floor fans provide high velocity, efficient cooling for warehouses, factories, plants and other industrial environments. Direct drive fan is made with all welded steel housing. Non-sparking cast aluminum fan blades are enclosed in 1/8" thick front and rear circular wire mesh guards. Totally enclosed fan cooled motor. Non-tipping heavy base for stability. Medium stand is made with an angle iron frame for strength. Drum fan allows tilting for vertical airflow adjustment. Meets OSHA specifications. Three phase design. Horsepower rating based upon maximum speed/load.