Function and airflow control This round backdraft damper features an intelligent design that promotes efficient airflow when closing to prevent backflow, improving ventilation and odor control. Fast installation Designed for easy connection to your existing ductwork, enabling a straightforward installation that saves time and effort. Versatile applications Suitable for a range of uses, including fan ducts and HVAC systems, making this damper essential for effective airflow direction control. Durable construction Made from durable materials to deliver long lasting performance without compromising efficiency in your ventilation system. Use scenarios - In residential bathrooms or kitchens to prevent odors from traveling back into living spaces. - In attic, crawlspace, or laundry vent applications to avoid backflow of contaminants. - In commercial HVAC ductwork to prevent cross-flow between zones while maintaining efficient airflow.