Provides powerful, efficient ventilation for kitchen, laundry room, rec room, or workshop. Designed for vertical ceiling installation only, features removable easy-to-clean permanently lubricated motor and blade assembly. Durable damper quietly eliminates backdrafts. Adjustable mounting brackets with keyhole slots span up to 24 inches to install easily between ceiling joists. Fits 8 In. round duct, 7 In. x 8 In. diameter steel housing. 11-1/4 In. square white polymeric grille can be painted to match any decor. HVI (Home Ventilating Institute) certified at 180 CFM (cubic feet per minute), 5.0 Sones. UL (Underwriter's Laboratories) listed.