PATIKIL 6-Inch Backdraft Damper PVC Ducting Hose Airflow Insert Backflow Preventer Shutter One-Way Draft Stopper for Kitchen Bathroom Exhaust Vent Fans

This return air damper is designed for versatile use in residential, commercial, and industrial HVAC systems, exhaust fans, and ventilation ducts to help maintain air quality and temperature control.

This gravity-operated backdraft damper effectively prevents reverse airflow, is constructed from durable, waterproof plastic for reliable long-term use, and fits both solid and flexible ducting with its low-profile design.

Installation: Simply slide the damper into your ventilation duct and secure it with a pipe clamp and tape.

This damper is for horizontal installation only (not functional in vertical ducts), and you must verify its outer diameter before ordering.

Notice: This backdraft damper is only suitable for horizontal installation, it will not function in vertical ducting; Please confirm the outer diameter of the backdraft damper before placing an order.