Features: Features a powerful 360 CFM permanently lubricated and sealed motor that's specifically designed for continuous use applications Energy efficient foam-insulated housing adjusts to fit walls that are 5-1/2" to 9-7/8" thick Compatible with a number of Broan multi-function and time control wall switches (sold separately) Not recommended for use over bathtubs and showersProduct Technologies: High Sones: We know that comfort and ambience matter in your bathroom. This fan produces 8 sones of sound output while the fan is in operation. High CFM Capacity: This fan has an impressive 360 CFM (cubic feet per minute) of clearing capacity designed for larger bathrooms. Controlling humidity in your bathroom extends the life of your décor and makes for a more hospitable space to prepare for the day ahead. Specifications: CFM: 360 Sones: 8 Duct Size: 10 Inch Round Grill Width: 13.5 Inches Grill Length: 13.5 Inches HVI Certified: Yes UL Listed: No Light Included: No Housing Length: 11-1/2" Housing Width: 11-1/2" Housing Depth: 9-7/8"Broan