Explosion Proof Aluminum Propeller Fan w/ Low Stand - 30" This low stand fan can be placed anywhere you need for efficient cooling. Ideal for outdoor use using a severe duty, explosion proof motor. This direct drive fan is made with all welded steel housing. Non-sparking cast aluminum fan blades are enclosed in 1/2" thick front and rear circular wire mesh guards. Non-tipping heavy base for stability. Meets OSHA specifications. Three phase design. Horsepower rating based upon maximum speed/load.