--- product_id: 454125780 title: "6 Inch Backdraft Damper Back Draft Vent Duct Shutter Blocker, Backflow Ducting Insert One-Way Airflow Preventer with Inline Springs Loaded Folding Blades, HVAC Extractor Range Fan Hood Deflector" brand: "miuwauer" price: "120 zł" currency: PLN in_stock: true reviews_count: 13 category: "Miuwauer" url: https://www.desertcart.pl/products/454125780-6-inch-backdraft-damper-back-draft-vent-duct-shutter-blocker store_origin: PL region: Poland --- # One-way airflow with spring-loaded blades Withstands temps up to 50°C Galvanized steel & aluminum build 6 Inch Backdraft Damper Back Draft Vent Duct Shutter Blocker, Backflow Ducting Insert One-Way Airflow Preventer with Inline Springs Loaded Folding Blades, HVAC Extractor Range Fan Hood Deflector **Brand:** miuwauer **Price:** 120 zł **Availability:** ✅ In Stock ## Summary > 🚀 Stop Backdrafts, Start Fresh Air Flow — Upgrade Your Vent Game! ## Quick Answers - **What is this?** 6 Inch Backdraft Damper Back Draft Vent Duct Shutter Blocker, Backflow Ducting Insert One-Way Airflow Preventer with Inline Springs Loaded Folding Blades, HVAC Extractor Range Fan Hood Deflector by miuwauer - **How much does it cost?** 120 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/454125780-6-inch-backdraft-damper-back-draft-vent-duct-shutter-blocker) ## Best For - miuwauer enthusiasts ## Why This Product - Trusted miuwauer brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Quiet, Airtight Seal:** Smooth-running springs and rubber gaskets create a noise-free, airtight barrier that keeps your airflow efficient and your space comfortable. - • **Durable, Premium Materials:** Galvanized steel body with aluminum flaps and stainless steel springs ensure long-lasting performance and corrosion resistance. - • **Versatile HVAC Compatibility:** Perfect for AC, dryer vents, exhaust fans, range hoods, and commercial or residential ventilation systems. - • **Smart One-Way Airflow Control:** Automatically opens and closes at low air volumes to prevent unwanted backdrafts and maintain optimal ventilation. - • **Effortless, Tool-Free Installation:** Push-in design fits flex and rigid ducts, with clear orientation guidelines for horizontal or vertical setups. ## Overview This 6-inch backdraft damper features a galvanized steel frame, aluminum blades, and stainless steel springs designed to withstand temperatures up to 50°C. It prevents reverse airflow with spring-loaded folding blades that open automatically at low air volumes, ensuring efficient one-way ventilation. Easy to install in both flexible and rigid ducts, it’s ideal for HVAC systems, dryer vents, and range hoods, providing a quiet, airtight seal that enhances indoor air quality and energy efficiency. ## Description Buy 6 Inch Backdraft Damper Back Draft Vent Duct Shutter Blocker, Backflow Ducting Insert One-Way Airflow Preventer with Inline Springs Loaded Folding Blades, HVAC Extractor Range Fan Hood Deflector: Damper & Steering Stabilizers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: As Expected! - Arrived within a few days. Good quality. I used it to prevent backdraft in a dryer vent. The air from the adjacent bathroom fan no longer goes into the dryer. Review: Air duct directional damper - Works great. Nice seal and very quiet ## Features - 【Quality Material】The backdraft damper is made of galvanized steel, the flap leaves are made of aluminu, and the axis and spring are made of stainless steel, which can withstand temperatures up to 50°C - 【Practical Features】The air duct choke prevents cold air or wind from entering the ventilation duct. The backflow flap opens and closes automatically at low air volumes. The valve is equipped with a smooth-running spring and a rubber gasket that create an airtight seal and grip between the damper and ducts - 【Easy Installation 】The backflow prevention valve is installed by pushing it into the ventilation duct to make it as mobile as possible. When the valve flap is installed horizontally, the position of the spring should be horizontal so that the valve flap can be opened and closed optimally. This also applies to vertical installation. Same for vertical installation - 【Multiple Usages】The draft blocker is designed for use in AC, dryer vent, exhaust, extractor or range hoods, heating systems, fans, vents and other residential, commercial and industrial HVAC applications. The back draft damper can be inserted into a flexible or non-flexible ventilation duct - 【Needs Attention 】This airflow regulating backdraft shutter is installed on the TD lip to improve ventilation by preventing air circulation when the fan is not in use. Plastic pipes are of different sizes and cannot be used with plastic pipes ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09R1HSG44 | | Best Sellers Rank | #212,177 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #457 in HVAC Ducting | | Brand | Miuwauer | | Customer Reviews | 4.2 4.2 out of 5 stars (181) | | Date First Available | January 24, 2022 | | Item Weight | 7 ounces | | Manufacturer | Miuwauer | | Package Dimensions | 6.85 x 6.5 x 3.62 inches | ## Images ![6 Inch Backdraft Damper Back Draft Vent Duct Shutter Blocker, Backflow Ducting Insert One-Way Airflow Preventer with Inline Springs Loaded Folding Blades, HVAC Extractor Range Fan Hood Deflector - Image 1](https://m.media-amazon.com/images/I/61bukIagPZL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ As Expected! *by G***M on October 27, 2023* Arrived within a few days. Good quality. I used it to prevent backdraft in a dryer vent. The air from the adjacent bathroom fan no longer goes into the dryer. ### ⭐⭐⭐⭐⭐ Air duct directional damper *by D***Y on July 7, 2025* Works great. Nice seal and very quiet ### ⭐⭐⭐⭐ Exactly what I was looking for 👍 *by L***R on October 14, 2024* I really like the seal inside that the dampers seat against when closed. Fits perfectly in the 4" exhaust duct. Using it to seal out outside air from entering the indoor greenhouse through the exhaust fan duct. ## Frequently Bought Together - 6 Inch Backdraft Damper Back Draft Vent Duct Shutter Blocker, Backflow Ducting Insert One-Way Airflow Preventer with Inline Springs Loaded Folding Blades, HVAC Extractor Range Fan Hood Deflector - MIAHART 6 inch Hose Clamp Adjustable 304 Stainless Steel Duct Clamps Worm Gear Adjustable 141mm-165mm Hose Clamp (Pack of 6) - AC Infinity Flexible 6-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 25-Feet Long for Heating Cooling Ventilation and Exhaust --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/454125780-6-inch-backdraft-damper-back-draft-vent-duct-shutter-blocker](https://www.desertcart.pl/products/454125780-6-inch-backdraft-damper-back-draft-vent-duct-shutter-blocker) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-05-18*