Command-A-Pitch™ Variable In-flight impellers are mounted in our popular vane axial fan housings, performance proven over many years in the most demanding environments. Housings are heavy gauge hot rolled steel, continuously welded in accordance with Section 9, A.S.M.E.Code to minimize friction losses and to enhance performance. Flanges on housings permit quick fastening to flexible duct and other accessories without special tools or skills.
