Broan 8" Utility Fan is a powerful and efficient ventilation solution for your kitchen, laundry room, recreation room, or workshop. It features a built-in damper to prevent backdrafts and an 11-1/2" square white polymeric grille that is paintable and removable for easy cleaning. The fan has a permanently lubricated motor with twist lock installation and a built-in backdraft damper. It is HVI certified at 180 CFM and includes a built-in on/off rotary switch, so no wall switch is required. The fan adjusts to fit walls 4-1/2" to 9-1/2" thick and has an 8-3/8" diameter steel housing. It fits an 8-1/4" round opening and has a 14-1/4" square outside flange. The fan has a fiberglass reinforced polymeric fan blade.