36" Belt Drive Whole House Fan with Shutter

36"" Belt driven fan with dependable 2-speed thermally protected PSC motorCeiling mount installation onlyRe-engineered bracing virtually eliminates vibrationDual ball bearing technology allows for superior shaft alignment and greater stabilityVentilates over 3200 sq. ft. on 1 storyPrecison balanced aluminum fan blade assemblyFour fan blades for greater air movementJoint-in/joist-out installationSteel venturi for enhanced durabilityWhite automatic shutter included, has 95% air closureHigh/low/off wall switch includedCFM: High 9700 / Low 6800UL & CUL listed