Unifizz 4" Backdraft Damper with Ducting Hose Clamp, 1 Set Stainless Steel Flexible Airflow Insert Backflow Preventer Draft Blocker for Kitchen Bathroom

• 【Material】The vent ducting damper is made of durable Stainless Steel with high hardness and high temperature resistance, not easy to deformation and corrosion, and can effectively prevent the air duct damper from moisture and fading, which can be applied for a long time.
• 【Application】When the exhaust starts, the air pressure will push to open the valve for air discharging; after the exhaust stops, the damper valve will automatically close and remain closed all the time to prevent odor, making your indoor environment full of fresh air.
• 【Advantage】The backdraft damper is used to prevent the backflow of lampblack or exhaust gas through air duct when the ventilation fan is off, it also prevents debris, dust and odor from entering your room.
• 【Installation】Fix the damper to the vent hole on the wall with spring clips;Then apply sealing glue around the bottom of the backdraft damper;Finally install the vent hose to the damper with pipe clamps and seal with tape if necessary.
• 【Usage】Widely used in dryers, extractors or range hoods, and other HVAC applications. You can install it in your home, kitchen, bathroom, office or living room which needs a ventilation system.

Feature: 1.Made of durable Stainless Steel, corrosion-resistant, sturdy and durable. 2.When the exhaust starts, the air pressure will push to open the valve for air discharging; after the exhaust stops, the damper valve will automatically close. 3.Easy to use,Fix the damper to the vent hole on the wall with spring clips,and apply sealing glue around the bottom of the backdraft damper, install the vent hose to the damper with pipe clamps and seal with tape. 4.Designed for dryers, extractors or range hoods, and other HVAC applications. Can install it in home, kitchen, bathroom, office or living room. Specification: Material :Stainless Steel Color: Silver Finish : Smooth Package include: 1pcs x Backdraft Damper Key Notes: 1.Please confirm the outer diameter of the backdraft damper before placing an order. 2.Please allow 0.1-0.5mm error due to manual measurement.