--- product_id: 497238403 title: "100mm Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 100mm Ducting in Range Hoods and Bathrooms Fans, 4-Inch" brand: "ac infinity" price: "₹ 5118" currency: INR in_stock: false reviews_count: 6 category: "Ac Infinity" url: https://www.desertcart.in/products/497238403-100mm-backdraft-damper-one-way-airflow-ducting-insert-with-spring store_origin: IN region: India --- # Spring-loaded aluminum blades open with minimal airflow Rubber gaskets ensure airtight seal & grip Galvanized steel body for durability 100mm Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 100mm Ducting in Range Hoods and Bathrooms Fans, 4-Inch **Brand:** ac infinity **Price:** ₹ 5118 **Availability:** ❌ Out of Stock ## Summary > 🚫❄️ Stop drafts, start comfort — your ducts’ new best friend! ## Quick Answers - **What is this?** 100mm Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 100mm Ducting in Range Hoods and Bathrooms Fans, 4-Inch by ac infinity - **How much does it cost?** ₹ 5118 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.in](https://www.desertcart.in/products/497238403-100mm-backdraft-damper-one-way-airflow-ducting-insert-with-spring) ## Best For - ac infinity enthusiasts ## Why This Product - Trusted ac infinity brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Perfect Fit:** Designed specifically for 4-inch duct openings with secure rubber gasket grip - • **Built to Last:** Powder-coated galvanized steel resists corrosion and wear - • **Effortless Airflow:** Spring-loaded blades open with minimal resistance for optimal ventilation - • **Versatile Mounting:** Fits horizontally or vertically for seamless installation - • **Ultimate Draft Defense:** Prevents cold drafts & debris from invading your ducts ## Overview The AC Infinity 100mm Backdraft Damper is a heavy-duty, spring-loaded one-way airflow insert designed for 4-inch ducting in range hoods, bathroom fans, and HVAC systems. Featuring a galvanized steel body with powder coat finish and airtight rubber gaskets, it prevents backflow, cold drafts, and debris while allowing smooth airflow with minimal resistance. Its versatile horizontal or vertical mounting and durable construction make it a must-have upgrade for efficient, draft-free ventilation. ## Description An antidraft duct insert designed for use with range hoods, bathroom fans and other home HVAC applications. Features outer rubber gaskets that create an airtight seal and grip between the damper and ducts. Mounts horizontally or vertically to prevent backflow and debris from entering ducting. Galvanized steel body with spring-loaded aluminum damper blades that open with minimal airflow. Fit for 4 in. Duct Openings | Product Length: 5.03 inches | Finish: Powder Coat Product Description A ventilation ducting tool designed for insertion into 4” ducting to prevent cold drafts and debris from flowing into ventilation systems. Built to be embedded in ducts, the backdraft damper is made of sturdy galvanized steel and features two rings of outer rubber gaskets. This enables it to grip your ducting with an airtight seal in either a horizontal or vertical orientation. The butterfly damper blades are made of aluminum and are equipped with a light spring that folds with minimal airflow. Applications The spring-loaded antidraft damper is built for heavy-duty performance in applications like overhead range hoods in kitchens, bathroom fans and tumble dryers. It can be fully or partially inserted into your duct work using the rubber rings to hold itself in place. Other one-way airflow uses include keep pilot lights burning in water heaters and keeping debris from entering inline duct fans in grow tents. Product Identification Manufacturer AC Infinity Inc. Product Name Backdraft Damper, 4" Product Model AC-BDD4-B UPC Code 819137021303 Product and Mounting Dimensions Duct Opening Size 4" Product Length 5.03 in. (12.8 cm) Product Performance and Technical Specs Whole Body Material Steel Shutter Material Aluminum Color Black Finish Powder Coat Review: Top bit of kit - Brilliant, sorted out the air coming into the property instantly! Felt warmer straight away, and looks very tidy and good quality. FOr the price of it as well, cant fault it at all. Review: Very solid unit. Walls are easily 2-3x thicker than the cheap ebay one I had before. Great design and quality. ## Features - An antidraft duct insert designed for use with range hoods, bathroom fans and other home HVAC applications. - Features outer rubber gaskets that create an airtight seal and grip between the damper and ducts. - Mounts horizontally or vertically to prevent backflow and debris from entering ducting. - Galvanized steel body with spring-loaded aluminum damper blades that open with minimal airflow. - Fit for 4 in. Duct Openings | Product Length: 5.03 inches | Finish: Powder Coat ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0842XSTV9 | | Best Sellers Rank | 70,312 in DIY & Tools ( See Top 100 in DIY & Tools ) 165 in Ducting | | Brand | AC Infinity | | Colour | Black | | Customer Reviews | 4.5 4.5 out of 5 stars (1,861) | | Item Dimensions | 12.7 x 9.7 x 9.7 centimetres | | Manufacturer | AC Infinity | | Material | Alloy Steel, Aluminium | | Model Number | AC-BDD4-B | | Size | 4 Inch | | UPC | 819137021303 | | Unit Count | 1.0 count | ## Product Details - **Brand:** AC Infinity - **Colour:** Black - **Item dimensions L x W x H:** 12.7 x 9.7 x 9.7 centimetres - **Manufacturer:** AC Infinity - **Material:** Alloy Steel, Aluminium - **Size:** 4 Inch - **UPC:** 819137021303 ## Images ![100mm Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 100mm Ducting in Range Hoods and Bathrooms Fans, 4-Inch - Image 1](https://m.media-amazon.com/images/I/51lALiYTYEL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Top bit of kit *by C***S on 7 January 2026* Brilliant, sorted out the air coming into the property instantly! Felt warmer straight away, and looks very tidy and good quality. FOr the price of it as well, cant fault it at all. ### ⭐⭐⭐⭐⭐ Review *by C***O on 7 December 2024* Very solid unit. Walls are easily 2-3x thicker than the cheap ebay one I had before. Great design and quality. ### ⭐ Review *by T***E on 21 December 2025* Das größte Außenmaß ist 206mm nicht 200mm. Die Klappen schlagen hart an und sind ungedämpft. Schöne Optik, aber mehr sicher nicht ## Frequently Bought Together - AC Infinity 4" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans - AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 25-Feet Long for Heating Cooling Ventilation and Exhaust - AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 8-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.in/products/497238403-100mm-backdraft-damper-one-way-airflow-ducting-insert-with-spring](https://www.desertcart.in/products/497238403-100mm-backdraft-damper-one-way-airflow-ducting-insert-with-spring) --- *Product available on Desertcart India* *Store origin: IN* *Last updated: 2026-04-27*