4" Backdraft Damper, One-Way Airflow Duct Insert with Spring-Loaded Aluminum Blades, for HVAC Exhaust Fans and Range Hood Ventilation Systems

Additional Details from the Manufacturer

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More features

• Durable Build:Crafted with a heavy-duty galvanized steel body and corrosion-resistant aluminum blades, this damper is built to last in both residential and commercial ventilation systems.
• Effective Backflow Prevention:Equipped with spring-loaded blades that automatically close when airflow reverses, this insert reliably blocks unwanted air, dust, or odors from re-entering your ducts.
• Improved Sealing Design: Integrated with exterior rubber rings and interior foam lining, the damper offers enhanced airtight performance while also reducing vibration and noise during operation.
• Flexible Mounting Options:Designed for versatile use, this airflow control device can be installed either vertically or horizontally, adapting easily to different ducting layouts and airflow directions.
• HVAC System Compatible: Ideal for use with range hoods, bathroom fans, and other home ventilation setups, this damper fits seamlessly into both rigid and flexible ductwork to improve system efficiency.