iPower 4 inch Shutter Back Draft Blocker, One-Way Airflow Ducting Insert Backflow Preventer with 2 Inline Springs Loaded Folding Blades, 4" Backdraft Damper, for HVAC Extractor Fan Vent, Range Hoods

The Backdraft Damper is a lightweight and efficient solution for preventing backflow in ventilation ducts.

Its spring-loaded wings open under pressure created by airflow and automatically close with a built-in spring, ensuring optimal performance.

The damper also features an internal foam strip and smooth-running spring to minimize rattling.

With its durable construction made of galvanized steel, aluminum flap leaves, and stainless steel axis and springs, this product can withstand temperatures from 14 to 140°F.

Its wide applications make it suitable for use with range hoods, bathroom fans, kitchen, and other home HVAC applications.

Don't miss out on this essential product for your ventilation needs!