{"product_id":"p-1491853","title":"4 Inch Backdraft Damper Control Valve, Duct Manual Volume Adjustment Airflow Ducting for Fan Airflow, Dryer Vent, Range Hood, White","description":"The manual volume damper is used for air volume regulation in an air ventilation system, widely used in industry. It can be used in exhaust fan ducts, dryer exhaust ports, fan airflow, vents and other residential and industrial applications, you can easily control the air flow rate or close off an air duct if needed. To some extent, it will increase the energy efficiency of your system.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003cbr\u003eColor: White\u003cbr\u003eMaterial: PVC\u003cbr\u003eOuter Diameter of Interface: 96 mm \/ 3.94 inch\u003cbr\u003eInner Diameter of Interface: 92 mm \/ 3.62 inch\u003cbr\u003ePacking List: 1 pcs Duct Manual Volume Damper\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eAdvantage\u003c\/strong\u003e\u003cbr\u003eMade of durable PVC material, environmental protection, easy to process, not easy to deformation and corrosion, moisture resistance and fading, can be used for a long time. The side design has a rotating handle, can adjust the air volume from multiple angles, easy to operate. Smooth interface, easy disassembly. Manual operation of the adjustable valve allows easy and efficient adjustment of air volume according to specific needs.\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003eInstruction\u003c\/strong\u003e\u003cbr\u003eEasy to install, just simply slide the volume damper into the pipe you are attaching to, and fix with pipe clamp and tape.\u003cbr\u003e\u003cstrong\u003e\u003cbr\u003eNotice: \u003c\/strong\u003e\u003cbr\u003ePlease confirm the outer diameter of the backdraft damper before placing an order.","brand":"Harfington","offers":[{"title":"Default Title","offer_id":48709176099065,"sku":"a24012100ux0474","price":19.6,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0595\/2477\/6095\/files\/ux_a24012100ux0474_ux_g03.jpg?v=1784920762","url":"https:\/\/www.harfington.com\/en-de\/products\/p-1491853","provider":"Harfington","version":"1.0","type":"link"}