Broan-NuTone 511 8" Room To Room Fan Since their beginning in 1932, Broan has pioneered many of the product innovations now established as standards of the industry. Today, Broan carries on the commitment to provide the finest products in the indus try. Broan-NuTone 511 8" Room To Room Fan Features: • Utility Fans, Room-to-room • 8" Fan, 180 CFM, 3.5 Sones. 13-1/2" square plastic grille. • 180 CFM 3.5 Sones • Built-in variable speed control • Housing adjusts to fit wa lls from 3” to 5-1/2” thick • Easy interior wall installation • Permanently lubricated motor • High-strength, reinforced polymeric fan blade • Two attractive white polymeric grilles can be painted to match decor