Engineered for quiet operation and energy efficiency, this bathroom ventilation fan comes complete with a hanger bar system for easy installation. Available in two sizes. Fan dimensions: 10-1/2" L x 11-3/8" W x 7-5/8" H. Grille dimensions: 13" L x 14" W. Nearly silent operation, less than 0.8 - 1.3 sones. 4" ducting. U.L. listed for use o...