The MaxxAir 42 in two-speed portable drum fan is a big air mover. This fan is ideal for moving large volumes of hot air quickly and efficiently to keep people and machines cooled off. The drum fan is useful in indoors, on the factory floor, in a warehouse or in a barn with livestock where high-velocity air movement is needed. This fan is belt-driven for quieter operation and longevity and has a rugged, 22 ga steel powder-coated housing for durability. The grille is OSHA compliant, rust-resistant and powder-coated.