Suited for areas where flammable gases, vapors or finely pulverized dusts may exist, the EPF-HPSM-24-480V has three spark-resistant cast-aluminum blades that move stale air at a rate of up to 6,860 ft3/min. The frame is made of heavy-duty 14 gauge steel that is arc welded with tubular supports. This unit is rated for use in Class 1, Group D, and Class II, Groups F and G, hazardous areas. The three-phase explosionproof fan has a 1-hp fully enclosed motor that spins the propeller at a rate of 1,750 rpm. The hard-wired ventilation fan is designed to be wall mounted and operates on 230 to 480 VAC electrical current. It can be used in clean rooms, extraction rooms, oil refineries, grain mills and chemical storage areas for fume, smoke and dust removal.