12" Certified Explosion-Proof Axial Fans For Hazardous Locations. Rugged, lightweight conductive polyethylene fan is designed to accommodate a variety of applications as well as demanding job site conditions in hazardous locations at an economical price. Approved for Hazardous Location Usage: CVF-12EXP - Class I, Div I, Groups C & D; Class II, Div I, Groups E, F, & G.