Cool Attic CX30BD2SPD Belt Drive 2-Speed Whole House Fan with Shutter, 30-Inch, White
This Cool Attic 30-inch belt drive 2-speed whole house fan with shutters will help cool down your home in those hot months.  It has a precision-balanced aluminum fan blade assembly with 4 blades, unlike 3 in most competing brands for greater air movement.  It has a joist-in/joist out installation and steel venturi for enhanced durability.  The shutter is a white powder-coated finish automatic shutter with 95% plus air closure.  A wall switch is included with high/low/off settings.  It is UL and C-UL listed and comes with a 10 year warranty.  This model is designed for 2,000 to 3,000 square feet on one story and has a CFM high/low of 7,800/5,400.  This unit needs 10 to 12 square feet of net free exhaust area. Rough Opening: 29-1/2-Inch  x 32-1/4-Inch, Outside Shutter Dimensions: 31-1/2-Inch  x 34-Inch.