Broan 676 Ceiling Mount Ventilation Fan - 110 CFM Broan 676 Ceiling Mount Ventilation Fan is an ideal solution to venting excess moisture and helping to prevent possible mold issues. The 676 is a home ventilation fan unit with 110 cubic feet per minute maximum air flow with a 4 sone rating. The centrifugal blower wheel comes equipped with a permanently lubricated motor for continuous operation. The 676 has a torsion spring grille mounting, requiring no tools for installation and removal of the grille cover.