--- product_id: 348481566 title: "4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector" brand: "kikerike" price: "€ 18.88" currency: EUR in_stock: true reviews_count: 13 url: https://www.desertcart.pt/products/348481566-4-inch-draft-blocker-backdraft-damper-duct-draft-stopper-one store_origin: PT region: Portugal --- # One-way airflow control 4-inch precision fit Galvanized steel durability 4 Inch Draft Blocker Backdraft Damper Duct Draft Stopper One-Way Airflow Ducting Insert Backflow Preventer Inline Fan Vent Deflector **Brand:** kikerike **Price:** € 18.88 **Availability:** ✅ In Stock ## Summary > 🌬️ Stop drafts, start comfort — your HVAC’s silent game-changer! ## 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 by kikerike - **How much does it cost?** € 18.88 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/348481566-4-inch-draft-blocker-backdraft-damper-duct-draft-stopper-one) ## Best For - kikerike enthusiasts ## Why This Product - Trusted kikerike brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Spring-Loaded Design:** Optimized flap movement with horizontal or vertical installation for maximum airflow efficiency and noise reduction. - • **Seamless 4-Inch Integration:** Engineered for a perfect fit in standard ventilation ducts, ensuring hassle-free installation and optimal performance. - • **Versatile HVAC Compatibility:** Ideal for ACs, exhaust fans, range hoods, heating ducts, and more—perfect for residential, commercial, and industrial setups. - • **Effortless One-Way Airflow Control:** Prevents unwanted backdrafts and air recirculation, maintaining fresh, clean air flow when fans are off. - • **Premium Galvanized Steel & Aluminum Build:** Robust materials guarantee long-lasting resistance to corrosion and wear, elevating your HVAC system’s reliability. ## Overview This 4-inch backdraft damper crafted from galvanized steel and aluminum flaps is designed to prevent air backflow in ventilation systems. Easy to install in various HVAC applications, it enhances airflow efficiency and protects against unwanted drafts, making it a must-have upgrade for any modern ventilation setup. ## Description The backdraft damper is made of a Galvanized steel, the flap leaves are made of aluminum Designed for use in AC, dryer vent, exhaust, extractor or range hoods, heating systems, fans, vents and other residential, commercial and industrial HVAC applications. Please consult and pay attention to product size before buying. Manual measurement, please allow slight errors on size. The colors may exist slight difference due to different screens. ## 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 | | Best Sellers Rank | #5,644 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #9 in HVAC Ducting | | Color | Silver | | Customer Reviews | 4.5 4.5 out of 5 stars (1,313) 4.5 out of 5 stars | | 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 ### ⭐⭐⭐⭐⭐ JUST WHAT i NEEDED *by on Reviewed in the United States July 26, 2026* WELL CONSTRUCTED, SHOULD WORK PERFECT ### ⭐⭐⭐⭐⭐ Function. Durability. Easy install. What most products should focus on *by on Reviewed in the United States March 27, 2026* Wasnt avail at big box stores near me so I scrambled to order this for my contractor installing the ductwork for my new kitchen stove vent. He said it was perfect and easy to install. It seems to be working great and our city inspector specifically went out of his way to check it. Passed without issue. Recommended. ### ⭐⭐⭐⭐⭐ Works and easy to install *by on Reviewed in the United States May 7, 2026* Stops outside air from coming into the dryer. Easy to install, ensure you get the airflow direction correct. ## 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.pt/products/348481566-4-inch-draft-blocker-backdraft-damper-duct-draft-stopper-one](https://www.desertcart.pt/products/348481566-4-inch-draft-blocker-backdraft-damper-duct-draft-stopper-one) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-08-31*