FlexAir Selectable: Choose between 80 or 110 CFM to match your bathroom’s airflow needs with a simple flip of the switch. No Attic Access Installation: Room-side install makes it easy to retrofit without needing access to the attic. Quiet Operation: Operates at just 0.6 or 1.3 sones for a peaceful bathroom environment. EZDuct Connector: Creates an airtight seal for fast, hassle-free duct connection. TrueSeal Damper Technology: Reduces air leakage by up to 50%, providing the tightest seal against backdrafts.