Get a direct drive axial downblast ventilator from Grainger to help provide a steady exhaust or supply of clean air under low to moderate static pressures. These exhaust fans feature NEMA 1 junction boxes in motor enclosures and are UL-705 listed for power ventilators. Spun aluminum construction and a rolled bead on the windband provide rigidity and stability to help provide easier lifting and moving. Many models offer speed controls. This selection of power roof ventilators includes 10"- and 12"-dia. propeller models that can be mounted on the wall if preferred. Get a reliable direct drive axial downblast ventilator when you shop Grainger for ventilation supplies today.