Broan-NuTone 1670F Fin Pak Fan 50 Cfm 3.5 Sones 6Pk 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 product s in the industry. Broan-NuTone 1670F Fin Pak Fan 50 Cfm 3.5 Sones 6Pk Features: • Finish Pack. Motor Assembly and Grille. 50 CFM, 3.5 Sones