The 12" (30 cm) Axial Fan is the latest addition to Air Systems' ventilation product group. Known for product quality and performance, Air Systems offers a rugged portable polyethylene fan line designed to accommodate a variety of applications as well as emanding job site conditions at an economical price. Certified for outdoor use. Applications: Electrical Transformer Repair, Construction / Maintenance, Utility Companies, Shipbuilding, Open Trenching, Manhole Entry, Underground Vaults.