8" inch Vortex S Line S-800 Power Fan 728 CFM by Atmosphere + VenTech Variable Fan Speed Controller

[Vortex S Line Powerfan] The S-line is a revolutionary series of fans that combine energy efficiency, ultra-quiet operations and a collection of advanced technologies that deliver unparalleled performances. An extremely energy efficient AC brushless motor powers the patented mixed-flow dual impellers. Built with double insulated walls, noise is reduced to levels that were previously thought to be unattainable. All S-Line models are assembled with high impact resistant polycarbonate casings, an integrated back draft damper and a mounting bracket designed for quick and easy installation. [VenTech Fan Speed Controller] The VenTech Speed Controller is an electronic circuit with the sole purpose to vary an electric motor's speed, just like those in your duct and inline fans. This router speed controller works with any universal AC/DC brush-type motor. The controller features a 3 - way rocker switch with high, medium or low options.