Metal Back Draft Shutter

A Back Draft Shutter is a mechanical ventilation device designed to prevent reverse airflow in duct systems. It automatically opens when air flows in the intended direction and closes when airflow stops or reverses, preventing backdrafts, energy loss, and contamination. Commonly used in HVAC systems, exhaust fans, and industrial ventilation, back draft shutters improve efficiency and maintain air quality by blocking unwanted drafts, dust, and external pollutants. Available in various materials such as galvanized steel, aluminum, or plastic, they can be spring-loaded or gravity-operated for different airflow applications.