--- product_id: 372302199 title: "AC Infinity 4\" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans" brand: "ac infinity" price: "KSh8906" currency: KES in_stock: true category: "Ac Infinity" url: https://www.desertcart.co.ke/products/372302199-ac-infinity-4-backdraft-damper-one-way-airflow-ducting-insert store_origin: KE region: Kenya --- # Spring-loaded aluminum blades for effortless airflow Rubber gaskets ensure airtight, no-backflow seal Galvanized steel body for durability AC Infinity 4" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans **Brand:** ac infinity **Price:** KSh8906 **Availability:** ✅ In Stock ## Summary > 🔄 Keep your airflow fresh and your space draft-free — the smart damper for savvy homes! ## Quick Answers - **What is this?** AC Infinity 4" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans by ac infinity - **How much does it cost?** KSh8906 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/372302199-ac-infinity-4-backdraft-damper-one-way-airflow-ducting-insert) ## 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:** Precision-engineered for standard 4-inch ducts, ideal for range hoods, bathroom fans, and more. - • **Built to Last:** Robust galvanized steel frame resists wear and tear for long-term reliability. - • **Seal the Deal:** Dual rubber gasket rings create an airtight grip, blocking drafts and debris effectively. - • **Effortless Airflow:** Spring-loaded aluminum blades open with minimal airflow, maximizing ventilation efficiency. - • **Versatile Installation:** Mounts horizontally or vertically to fit any ducting setup seamlessly. ## Overview The AC Infinity 4" Backdraft Damper is a premium one-way airflow insert designed for 4-inch ducting in range hoods, bathroom fans, and HVAC systems. Featuring a galvanized steel body, spring-loaded aluminum blades, and dual rubber gaskets, it prevents backflow, drafts, and debris with an airtight seal. Its versatile horizontal or vertical mounting and powder-coated finish ensure durability and seamless integration into your ventilation setup. ## 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 ## 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 | | ASIN | B0842XSTV9 | | Best Sellers Rank | #44,607 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #83 in Heating & Cooling Ducting Products | | Brand Name | AC Infinity | | Color | Black | | Customer Reviews | 4.5 4.5 out of 5 stars (1,873) | | Customer reviews | 4.5 4.5 out of 5 stars (1,873) | | Date First Available | 25 March 2020 | | Item Dimensions | 12.7 x 9.7 x 9.7 centimeters | | Item model number | AC-BDD4-B | | Manufacturer | AC Infinity | | Manufacturer | AC Infinity | | Manufacturer Part Number | AC-BDD4-B | | Material Type | Alloy Steel, Aluminum | | Model Number | AC-BDD4-B | | Product Dimensions | 12.7 x 9.68 x 9.68 cm; 299 g | | Size | 4 Inch | | UPC | 819137021303 | | Unit Count | 1 Count | ## Product Details - **Brand:** AC Infinity - **Colour:** Black - **Item dimensions L x W x H:** 12.7 x 9.7 x 9.7 centimeters - **Material:** Alloy Steel, Aluminum - **Size:** 4 Inch ## Images ![AC Infinity 4" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans - Image 1](https://m.media-amazon.com/images/I/51lALiYTYEL.jpg) ![AC Infinity 4" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans - Image 2](https://m.media-amazon.com/images/I/51jBoph3RiL.jpg) ![AC Infinity 4" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans - Image 3](https://m.media-amazon.com/images/I/51Vig+xStqL.jpg) ![AC Infinity 4" Backdraft Damper, One-Way Airflow Ducting Insert with Spring-Loaded Folding Blades for 4” Ducting in Range Hoods and Bathrooms Fans - Image 4](https://m.media-amazon.com/images/I/51JTxQHs5SL.jpg) ## Available Options This product comes in different **Size** options. ## 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.co.ke/products/372302199-ac-infinity-4-backdraft-damper-one-way-airflow-ducting-insert](https://www.desertcart.co.ke/products/372302199-ac-infinity-4-backdraft-damper-one-way-airflow-ducting-insert) --- *Product available on Desertcart Kenya* *Store origin: KE* *Last updated: 2026-05-18*