SurfaceShield(TM) technology combined with Broan s powerful ventilation is an effective one, two punch to kill* viruses and prevent the growth of bacteria, mold, and fungi within your room, 110 CFM, Effective ventilation to remove moisture and reduce the risk of mold or mildew in most full baths, Retrofit installations can be done entirely from the room-side - no attic access required. This means a faster, easier installation, EzDuct(TM) connector can be installed from the room side, with no attic access required, TrueSeal(TM) Damper technology reduces air leakage up to 50%