MIVIDE 2Pack 4 Inch Backdraft Damper Backflow Shutter Damper Inline Fan Vent Deflector with Spring-Loaded Folding Blades for Ducting in Range

PRODUCT SIZE: Diameter 100MM/4 inch, length 88MM/3.5 inch, thickness 0.5MM/0.02 inch. HIGH QUALITY MATERIALS: Galvanized steel damper is made of quality galvanized steel, and the axis and spring are made of stainless steel, product Very solid and well made, good tension on the spring. EASY TO INSTALLATION: The backflow flap is installed by inserting it into the ventilation pipe until it stops. The position of the spring should be horizontal for horizontal installations so that it can open and close optimally. The backdraft shutter is installed so that the damper blades open only in the outflowing air direction. PRACTICAL DESIGN: Backdraft damper has a smooth-running spring. The backflow flap opens and closes automatically at low air volumes. Backdraft damper can ventilate an area to avoid toxic fumes from building up. WIDE RANGE OF USAGES: These draft blocker set can be widely applied in exhaust fan pipe, a dryer duct, range hoods, heating ducts, vents and other residential and industrial applications. 2PCS 4” Draft Blocker, Backdraft Damper Duct, Draft Stopper, Backflow Preventer, Inline Fan Vent Deflector /b P Features: /b br What Is a Backdraft Damper? /b br A backdraft damper, also known as a gravity damper, is a piece of equipment that allows air to flow through in one direction while preventing air from entering the opposite side, also known as a backdraft. Backdraft dampers assist in the exhaust or intake of heating, ventilation, and air conditioning (HVAC) systems. p br Why Do I Need a Backdraft Damper? Installing a damper keeps temperature-controlled or purified air within your space while simultaneously keeping outside air from coming in. A backdraft damper is useful in controlling temperature but can also be used to improve the ventilation of a space. p br Ideal for all tumble dryer vent pipes / hoses, bathroom extractors and vents, air conditioning and heating units, kitchen vents and fans, all home wall and ceiling vents, heat transfer and ventilation systems, gas and electric dryers, cooker hood extractors, as well as a wide variety of industrial uses. p Specifications: /b br Quantity: 2 PCS br Material: Quality galvanized steel br Color: Silver br Mold size: backdraft damper: 100x88x0.5mm/ 4×3.5×0.02inches p Package contents: /b br 2 x Backdraft damper p Warm Notice: /b br Please consult and pay attention to product size before buying. br Manual measurement, please allow slight errors on size. br The colors may exist slight difference due to different screens.