When these inline duct blowers were conceived, reliability and efficiency were the main goal. Its' more powerful motor combined with its' aerodynamically designed shape make Vortex Powerfan the performance leader in its' category. These high performance inline blowers feature 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 Vortex Powerfan is also the first industrial inline duct fan that comes with a power cord, ready to plug in, installed by the manufacturer. Never seen in the ventilation industry, these blowers feature a 10 year warranty. The bottom line: Vortex Powerfan is all about performance, reliability, and quality all wrapped up into one package to ensure peace of mind for years.