--- product_id: 668052263 title: "AC Infinity Duct Adapter, 6” to 4” Ducting Reducer Increaser Cone for Grow Tent Bathroom Kitchen Ventilation Systems" brand: "ac infinity" price: "€ 91.63" currency: EUR in_stock: true reviews_count: 5 category: "Ac Infinity" url: https://www.desertcart.it/products/668052263-ac-infinity-duct-adapter-6-to-4-ducting-reducer-increaser store_origin: IT region: Italy --- # 6" to 4" precision fit High-temp zinc coating durability Galvanized steel corrosion-resistant AC Infinity Duct Adapter, 6” to 4” Ducting Reducer Increaser Cone for Grow Tent Bathroom Kitchen Ventilation Systems **Brand:** ac infinity **Price:** € 91.63 **Availability:** ✅ In Stock ## Summary > 🔧 Upgrade your airflow game with precision and durability! ## Quick Answers - **What is this?** AC Infinity Duct Adapter, 6” to 4” Ducting Reducer Increaser Cone for Grow Tent Bathroom Kitchen Ventilation Systems by ac infinity - **How much does it cost?** € 91.63 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/668052263-ac-infinity-duct-adapter-6-to-4-ducting-reducer-increaser) ## 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 - • **Built to Last:** Galvanized steel body with zinc finish resists corrosion and heat for long-term reliability. - • **Grip-Enhanced Design:** Raised lips on smaller end ensure a secure, slip-free connection every time. - • **Seamless Size Transition:** Effortlessly adapts 6" ducts to 4" for perfect airflow integration. - • **Maximized Airflow Efficiency:** Maintains optimal CFM by creating a smooth, leak-free duct connection. - • **Versatile Ventilation Solution:** Ideal for grow tents, bathroom fans, dust collectors, and kitchen vents alike. ## Overview The AC Infinity Duct Adapter is a robust 6" to 4" galvanized steel reducer designed to connect different sized duct openings seamlessly. Featuring a zinc-coated finish for corrosion and heat resistance, it ensures secure grip and maintains airflow efficiency across ventilation systems including grow tents, bathrooms, and dust collectors. ## Description A ducting cone designed for adapting ductwork to equipment like bathroom fans and dust collectors. Maintains airflow efficiency by creating a seamless connection between two different sized duct openings. Raised lips on the smaller opening for extra grip on ducting or your equipment’s duct opening. Galvanized steel body that is corrosion-resistant and can withstand high temperatures. Adapts 6 inches to 4 inches | Product Length: 5.11 inches | Finish: Zinc Coating Product Description A ventilation ducting tool designed to fit different-sized duct hole openings together, connecting smaller ducting to bigger fans and vice versa. Using this duct adapter to connect your ventilation fans to your ducting will help retain your system’s CFM efficiency. It features a raised lip on the reducer end to provide extra grip on ducting or duct openings, while the increaser end features a flat brim to achieve a flush fit. The galvanized steel body is finished with a zinc coating that aids in its resistance to corrosion and high temperatures. Applications The duct adapter is a versatile tool that can be retrofitted with a variety of different-sized ducting and fans. It is commonly paired with bathroom exhaust fans and dust collection units to adapt them to smaller ductwork as a reducer. Other adaptation projects include range hoods, tumble dryers, grow tent ventilation systems, and connecting smaller ducts to bigger ducts. Product Identification Manufacturer AC Infinity Inc. Product Name Duct Reducer 6" to 4" Adapter Product Model AC-SDR64 UPC Code 819137021334 Product and Mounting Dimensions Duct Opening Sizes 6" to 4" Product Length 5.11 in. (13.0 cm) Product Performance and Technical Specs Construction Galvanized Steel Color Metallic Silver Finish Zinc Coating ## Features - A ducting cone designed for adapting ductwork to equipment like bathroom fans and dust collectors. - Maintains airflow efficiency by creating a connection between two different sized duct openings. - Raised lips on the smaller opening for extra grip on ducting or your equipment's duct opening. - Galvanized steel body that is corrosion-resistant and can withstand high temperatures. - Adapts 6 inches to 4 inches | Product Length: 5 inches | Finish: Zinc Coating ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0842XMBYC | | Brand | AC Infinity | | Brand Name | AC Infinity | | Colour | Black | | Connector Type | Reducer | | Country of Publication | USA | | Customer Reviews | 4.4 out of 5 stars 909 Reviews | | Exterior Finish | Zinc | | Item Weight | 0.34 Kilograms | | Manufacturer | AC Infinity | | Manufacturer Part Number | AC-SDR64 | | Material | Galvanized Steel | | Material Type | Galvanized Steel | | Model Number | AC-SDR64 | | Number of Pieces | 1 | | Size | 6" to 4" | | Thread Size | 6" to 4" | | UPC | 819137021334 | | Unit Count | 1 Count | ## Product Details - **Size:** 6" to 4" - **Material:** Galvanized Steel - **Brand:** AC Infinity - **Colour:** Black - **Connector Type:** Reducer - **Thread Size:** 6" to 4" - **Exterior Finish:** Zinc - **Item Weight:** 0.34 Kilograms - **Number of Pieces:** 1 - **Manufacturer:** AC Infinity ## Images ![AC Infinity Duct Adapter, 6” to 4” Ducting Reducer Increaser Cone for Grow Tent Bathroom Kitchen Ventilation Systems - Image 1](https://m.media-amazon.com/images/I/41SUtiulYQS.jpg) ![AC Infinity Duct Adapter, 6” to 4” Ducting Reducer Increaser Cone for Grow Tent Bathroom Kitchen Ventilation Systems - Image 2](https://m.media-amazon.com/images/I/51b+0PkHI5L.jpg) ![AC Infinity Duct Adapter, 6” to 4” Ducting Reducer Increaser Cone for Grow Tent Bathroom Kitchen Ventilation Systems - Image 3](https://m.media-amazon.com/images/I/51z2ReV+Q+S.jpg) ![AC Infinity Duct Adapter, 6” to 4” Ducting Reducer Increaser Cone for Grow Tent Bathroom Kitchen Ventilation Systems - Image 4](https://m.media-amazon.com/images/I/61OLtC08krS.jpg) ## Questions & Answers **Q: Won't this hurt cfm's?** A: I used this for my smoker shed, so not sure about the cfm's **Q: How does this effect the rated CFM?** A: CFM is a measure of volume over time. Any time the output is restricted (say 6" down to 4") you can expect a back pressure and a REDUCTION in CFM, even if there is an increase in velocity (speed) of the airflow. Opening back up this restriction (4" up to 6") will not necessarily increase your CFM, it just decreases the velocity of the airflow and is less restrictive. It is not possible to increase CFM in this manner, without the introduction of another fan beyond the initial restriction. **Q: can this be used for stove piping? what is the gauge of the metal?** A: No it's not stove pipe **Q: Is this a solid 1 piece Construction?** A: Yes. Very solid and sturdy. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by C***A on 2 April 2026* ### ⭐⭐⭐⭐⭐ Review *by K***N on 1 August 2022* ### ⭐⭐⭐⭐⭐ Review *by B***N on 28 December 2025* ## Frequently Bought Together - AC Infinity Duct Adapter, 6” to 4” Ducting Reducer Increaser Cone for Grow Tent Bathroom Kitchen Ventilation Systems - AC Infinity CLOUDLINE PRO S6, Quiet 6” Inline Duct Fan with Speed Controller - EC Motor Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics --- ## 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.it/products/668052263-ac-infinity-duct-adapter-6-to-4-ducting-reducer-increaser](https://www.desertcart.it/products/668052263-ac-infinity-duct-adapter-6-to-4-ducting-reducer-increaser) --- *Product available on Desertcart Italy* *Store origin: IT* *Last updated: 2026-05-05*