【Material】The 4 inch backdraft damper and the flap leaves is made of a Galvanized steel, the Axis are made of aluminum, while the spring are made of carbon steel.
【Installation method】The position of the spring should be horizontal for horizontal installations so that it can open and close optimally
【Wide applications】Back draught valves can be inserted into ventilation ducts which are flexible or non-flexible. Designed for use with range hoods, bathroom fans, kitchen and other home HVAC applications.
【Lightweight valve wings】The valve wings open under the pressure created by the airflow; when the air flows in the opposite direction, it is automatically closed under the action of the spring, so as to cut off the flow.
【Backdraft Shutter】Hon&Guan Draft Blocker designed to improve ventilation by preventing air from re-circulating when the fans are not in use, rubber ring ensure 100% closure and quiet closing.
Shipping problems
Due to the lack of international flights due to the epidemic, and high oil prices and fuel surcharges, transportation costs will increase sharply.
https://hongguanfan.shop/products/4-backdraft-dampe-blocker72417696810864 Inch Backdraft Damper HVAC Inline Fan Vent Deflector（One-Way Airflow Ducting Insert Backflow Preventer Duct Draft Blocker）6.99//hongguanfan.shop/cdn/shop/products/2_6afc215f-af8b-43c5-8044-8c067da03e5f.png?v=1653623529//hongguanfan.shop/cdn/shop/products/2_6afc215f-af8b-43c5-8044-8c067da03e5f_large.png?v=1653623529USDInStock127946850381Featured Products
【Material】The 4 inch backdraft damper and the flap leaves is made of a Galvanized steel, the Axis are made of aluminum, while the spring are made of carbon steel.
【Installation method】The position of the spring should be horizontal for horizontal installations so that it can open and close optimally
【Wide applications】Back draught valves can be inserted into ventilation ducts which are flexible or non-flexible. Designed for use with range hoods, bathroom fans, kitchen and other home HVAC applications.
【Lightweight valve wings】The valve wings open under the pressure created by the airflow; when the air flows in the opposite direction, it is automatically closed under the action of the spring, so as to cut off the flow.
【Backdraft Shutter】Hon&Guan Draft Blocker designed to improve ventilation by preventing air from re-circulating when the fans are not in use, rubber ring ensure 100% closure and quiet closing.
7.99Hon&Guan//hongguanfan.shop/cdn/shop/products/4_4712ed6d-999f-459a-882e-619ca69824f3.png?v=1653623524//hongguanfan.shop/cdn/shop/products/5_37d49711-550a-4400-a1a4-794a75f7e449.png?v=1653623517//hongguanfan.shop/cdn/shop/products/11_91993642-f104-47d0-9ed1-5ba8ebae63d9.jpg?v=1653623511//hongguanfan.shop/cdn/shop/products/2-2.png?v=1653623506//hongguanfan.shop/cdn/shop/products/8_91551c33-a1d4-4f48-9a3c-e70cceed7b77.png?v=1653623499414819088795504 Inch6.997.99//hongguanfan.shop/cdn/shop/products/2_6afc215f-af8b-43c5-8044-8c067da03e5f.png?v=1653623529https://hongguanfan.shop/products/4-backdraft-dampe-blocker?variant=41481908879550InStock4 Inch414819089123186 Inch7.999.99//hongguanfan.shop/cdn/shop/products/4_4712ed6d-999f-459a-882e-619ca69824f3.png?v=1653623524https://hongguanfan.shop/products/4-backdraft-dampe-blocker?variant=41481908912318InStock6 Inch414819089450868 Inch8.9912.99//hongguanfan.shop/cdn/shop/products/5_37d49711-550a-4400-a1a4-794a75f7e449.png?v=1653623517https://hongguanfan.shop/products/4-backdraft-dampe-blocker?variant=41481908945086InStock8 Inch4148190897785410 Inch10.9914.99//hongguanfan.shop/cdn/shop/products/11_91993642-f104-47d0-9ed1-5ba8ebae63d9.jpg?v=1653623511https://hongguanfan.shop/products/4-backdraft-dampe-blocker?variant=41481908977854InStock10 Inch
