Inline 4 Inch Backdraft Damper With One Way Airflow Check Valve For Ducting, Spring Loaded Shutter And Airtight Rubber Seal That Keeps Drafts Out And Odors In Check For Dryer Vents, Bathrooms, And Range Hoods

Single 4-inch inline backdraft damper with airtight seal
✔️ One-way airflow, spring-loaded blades, quiet gasket seal

This passive inline backdraft damper fits standard 4-inch ducts and is ideal for dryer vents, bathroom exhausts, and kitchen range hoods. It prevents cold drafts, odors, and backflow while allowing exhaust to vent out smoothly.

✅ One-way airflow blocks backdrafts and odors in 4-inch ducts
✅ Airtight gasket seal and foam padding maximize energy efficiency
✅ Spring-loaded blades snap shut when airflow stops for quick sealing
✅ Noise-dampening design minimizes rattling in high-pressure systems
✅ Galvanized steel housing fits standard 4-inch (100mm) ducts
✅ Ideal for dryer vents, bathrooms, and range hoods

💡 What is a backdraft damper used for in home ventilation?

These handy devices help control airflow in duct runs, blocking outside air and odors while allowing exhaust to escape.

- Handy for 4-inch dryer vents, bathroom fans, and kitchen range hoods

- One-way design stops backflow, drafts, and odors from entering living spaces

- Spring-loaded blades seal quickly to save energy and reduce noise

- Quiet operation with gasket seals and foam padding in galvanized housing