Description Documents Specifications Description Backdraft spring-loaded dampers are recommended for the stale air to outside air duct. This damper prevents outdoor air from entering the Air Exchanger while it's in standby, off, or recirculating. These dampers are installed with leaf-hinge vertical. Documents Specifications Manufacturer: Airia Brands Inc. Description: 6 inch Backdraft Damper Compatibility: all brands. Manufacturers’ Part Number: 99-RSK6
