Designed for use in applications requiring a large amount of output in a hazardous location environment. Our 20" Axial Explosion-Proof Metal Blower is offered with a 1/2 hp single-phase motor and an efficient three-blade impeller fan in a rugged metal housing. Also included is a NEMA rated 115V plug to be used with an explosion-proof socket (sold separately). Meets Class I, Division 1 and 2, Groups C & D, Class II Division 1 and 2 Groups F & G. UL Listed.