When these inline duct blowers were developped, reliability and efficiency were the main goal. Its powerful motor combined with its’ aerodynamically designed shape make Vortex Powerfan the performance leader in its’ category. Superior steel construction with powder coated baked paint and convenient North-American sizes from 4 to 12 inches. Speed controllable and balanced motors with permanently lubricated ball bearings ensure vibration-free operation. Proudly made in Canada by Atmosphere, the first industrial inline duct fan that comes with a power cord, ready to plug in. 10 years warranty.