PATIKIL 4 Inch Backdraft Damper, 2Pcs PVC Ducting Hose Airflow Insert Backflow Preventer Shutter, One-Way Draft Stopper for Kitchen Bathroom Exhaust Vent Fans

• Material: PVC; Color: White; Inner Diameter of Interface: 100 mm / 3.9 Inch; Outer Diameter of Interface: 103 mm / 4.1 Inch; Length: 103 mm / 4.1 Inch; Packing List: 2 pcs Backdraft Damper
• Advantage: Durable plastic material, durable performance and waterproof, to ensure reliability, can be used for a long time. Smooth interface and easy disassembly. With gravity shutter flap, effectively prevent the backdraft air flow, it is suitable for use together with solid plastic ducts or flexible ducts.
• Instruction: Easy to install, simply slide it directly into your ventilation pipe, and then use the pipe clamp and tape for a secure fit.
• Application: Our return air dampers are suitable for residential and commercial applications and are fit for use in HVAC systems, exhaust fans and ventilation ducts. Whether in your home, office or industrial environment, this damper is a versatile solution for maintaining optimal air quality and temperature control.
• 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.

Our return air dampers are suitable for residential and commercial applications and are fit for use in HVAC systems, exhaust fans and ventilation ducts. Whether in your home, office or industrial environment, this damper is a versatile solution for maintaining optimal air quality and temperature control. Specification Material: PVC Color: White Inner Diameter of Interface: 100 mm / 3.9 Inch Outer Diameter of Interface: 103 mm / 4.1 Inch Length: 103 mm / 4.1 Inch Packing List: 2 pcs Backdraft Damper Advantage Durable plastic material, durable performance and waterproof, to ensure reliability, can be used for a long time. Smooth interface and easy disassembly. With gravity shutter flap, effectively prevent the backdraft air flow, it is suitable for use together with solid plastic ducts or flexible ducts. Instruction Easy to install, simply slide it directly into your ventilation pipe, and then use the pipe clamp and tape for a secure fit. 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.