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Bath Fans
Why does my damper stay open on my unit?
Our dampers are specifically designed to remain open slightly when the fan is off. This protects the unit from over-heating when the light only is being used and will allow any accumulating heat to be removed from the housing and into the duct work. Any backdraft in the ducting will cause the damper flap to close, preventing outside air from entering the room. The same dampers are currently being used on our fan only and fan/light units.