Duct Size 4 in.

WhisperValue^® DC™ Fan/LED Light with pre-installed condensation sensor helps control bathroom condensation to prevent mold and mildew. It is the lowest profile ENERGY STAR^® rated ventilation fan available. Ideal for residential construction (Single & Multi-Family) and Manufactured Homes. It features Panasonic’s revolutionary DC motor with SmartFlow™ optimum CFM technology and incorporates a Pick-A-Flow™ speed selector switch to customize airflow (50-80-100 CFM).