--- product_id: 348481566 title: "4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector" price: "191 kr" currency: DKK in_stock: true reviews_count: 13 url: https://www.desertcart.dk/products/348481566-4-inch-draft-blocker-backdraft-damper-duct-draft-stopper-one store_origin: DK region: Denmark --- # One-way airflow with minimal resistance Spring-loaded flap for smooth operation Galvanized steel & aluminum build 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector **Price:** 191 kr **Availability:** ✅ In Stock ## Summary > 💨 Seal the deal on fresh airflow—never let drafts steal your comfort! ## Quick Answers - **What is this?** 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector - **How much does it cost?** 191 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/348481566-4-inch-draft-blocker-backdraft-damper-duct-draft-stopper-one) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Installation:** Simply push into any 4-inch ventilation pipe with spring alignment for optimal flap movement—no tools required. - • **Prevent Costly Backdrafts:** Effectively stops unwanted air recirculation and backflow, enhancing indoor air quality and energy efficiency. - • **Optimized Airflow Efficiency:** Designed to open easily even at low CFM, reducing airflow restriction to under 10%, perfect for sensitive HVAC setups. - • **Universal Vent Compatibility:** Ideal for residential, commercial, and industrial ducts including ACs, exhaust fans, range hoods, and heating vents. - • **Durable Industrial-Grade Materials:** Crafted from galvanized steel and aluminum for long-lasting performance and corrosion resistance. ## Overview This 4-inch backdraft damper features a galvanized steel body with aluminum flaps and a spring-loaded mechanism to ensure smooth, one-way airflow. Engineered for easy push-in installation, it minimizes airflow restriction to under 10%, making it ideal for low CFM applications like bathroom exhausts and kitchen vents. Compatible with most metal ducts, it prevents backdrafts and improves ventilation efficiency across residential, commercial, and industrial settings. ## Description Kikerike We are committed to designing excellent products and a great shopping experience for our customers. Serving customers is our top priority. Our brands cover a wide range of categories. We are always here to help you with anything and make your home as great as possible. Behind our products stands our professional and technical supports. We will turn your pursuit of life into reality, please look forward to Kikerike. Serving customers is our top priority. Our brands cover a wide range of categories. We are always here to help you with anything and make your home as great as possible. Behind our products stands our professional and technical supports. We will turn your pursuit of life into reality, please look forward to Kikerike. Folding Stool Insulated bag About RV Seal Kit Motorcycle Helmet Rack Wall Mount & 180 Degree Rotation Motorcycle Helmet Rack Wall Mount & 180 Degree Rotation Terminal Pin Removal Tool Kit About Adhesive Strip Tape ## Features - 【Material】The 4 inch backdraft damper is made of a Galvanized steel, the flap leaves are made of aluminum - 【Installation】The backdraft damper is installed by pushing it into the ventilation pipe as far as it will go. The position of the spring should be horizontal when the flap is installed horizontally so that it can be opened and closed optimally. This also applies to the vertical installation - 【Function】This airflow regulating backdraft shutter fits over the TD lip and is designed to improve ventilation by preventing air from re-circulating when the fans are not in use - 【Wide Application】 These backdraft dampers can be widely used in ACs, exhaust fans, extractors, range hoods, heating ducts, vents and other residential, commercial and industrial applications - 【Note】Back draught valves can be inserted into ventilation ducts which are flexible or non flexible. Cannot be used with plastic ducts as the sizes are different. All dimensions are measured manually, please allow 1-3mm differences ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B099KGNZRL | | Batteries Included? | No | | Batteries Required? | No | | Best Sellers Rank | #6,909 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #11 in HVAC Ducting | | Color | Silver | | Customer Reviews | 4.6 4.6 out of 5 stars (1,198) | | Date First Available | July 15, 2021 | | Item Package Quantity | 1 | | Item Weight | 4.2 ounces | | Manufacturer | Kikerike | | Package Dimensions | 6.26 x 4.88 x 3.9 inches | | Size | 4 Inch | ## Images ![4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector - Image 1](https://m.media-amazon.com/images/I/614fF1RgQ7L.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: Can this be used to stop my Hot water tank from blowing out the flame on windy days?** A: sorry, I did not use it for the flame from HWT. **Q: can this be used on a dryer vent or will the foam seal melt?** A: I would say the dryer heat could damage or maybe even melt the seal. Maybe you could try removing the gasket and wrap a strip of fiberglass in it’s place. **Q: Would this help keep out bugs?** A: Yes it creates a barrier and only opens one way from the inside of house **Q: Would this fit between two sections of standard, 4 inch semi-rigid ducting? Looking to add to bathroom vent fan ductwork.** A: Yes, that's exactly how you would use it. Make sure to buy the correct HVAC aluminum (metallic) duct tape for the connection. A clamp cannot be used bc the crushing pressure would inhibit the flapper from working properly. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by C***B on March 27, 2026* ### ⭐⭐⭐⭐⭐ Review *by C***E on April 21, 2026* ### ⭐⭐⭐⭐⭐ Review *by J***N on January 23, 2026* ## Frequently Bought Together - 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector - QWORK 4" Duct Splitter, 45° Degree 4 Inch Branch Metal Duct Connector 3 Way Hose Adapter/Splitter - EesTeck 4" (Diameter) Adjustable 304 Stainless Steel Duct Clamps Hose Clamp Pipe Clamp Air Ducting Clamp worm drive hose clamps (4Pcs, 91mm-114mm) --- ## 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.dk/products/348481566-4-inch-draft-blocker-backdraft-damper-duct-draft-stopper-one](https://www.desertcart.dk/products/348481566-4-inch-draft-blocker-backdraft-damper-duct-draft-stopper-one) --- *Product available on Desertcart Denmark* *Store origin: DK* *Last updated: 2026-05-17*