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AC Infinity

AC Infinity Flexible 4-Inch Aluminum Ducting | Heavy-Duty Four-Layer Protection, 8-Feet Long for Heating Cooling Ventilation and Exhaust

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Size: 4 Inch


Features

  • Designed for ventilation applications including HVAC, dryer, grow rooms and tents.
  • Four-layer design makes it more durable and resistant to leaks, tears, and cuts.
  • Steel-wire spiral structure is flexible and easy-to-install in hard to reach places.
  • Constructed of aluminum and thermoplastic; tube can be shortened for various applications.
  • Ducting Size: 4 | Length: 8 feet | Includes two stainless steel 4" duct clamps

Description

Product Description This ducting is designed for various ventilation, circulation, and heating/cooling transfer applications. It features four-layer protection, making it more durable and resistant to leaks than single-layer designs. The internal layer is made of heavy-duty dual aluminum foil that is fire/flame resistant. Its outer layer utilizes dual PVC thermoplastic that protects the aluminum from cuts and tears while stopping leakage. Each duct tube is held together by an internal steel-wire spiral that is flexible and easy to install in hard to reach places. The ducting can be shortened by cutting the tube to fit various applications. Includes two stainless steel duct clamps. Applications Primarily used with duct fan systems in various air circulation and ventilation projects including hydroponic grow rooms and tents, bathrooms and attics, heating and cooling transportation, and other installations. It is also used to cool AV equipment rooms, closets, racks, and cabinets. Flexible ducting tube designed to route airflow in home HVAC applications. Creates a passage to supply, return, and exhaust air. Ducting tubes are a vital part of any room that requires a regular exchange of air, facilitating air delivery for proper ventilation. Using ducting will streamline the airflow, ensuring good indoor air quality and thermal comfort in your home or workplace. Features dual layer protection made of an outer thermoplastic and an inner aluminum. Employs a four-layer design that resists leaks, tears, and cuts. The spiral wire holds the tubular shape, while the inner lining stays smooth and straight when stretched out, maximizing airflow and diminishing CFM loss. Makes installation easy by bending the aluminum duct tube in any direction. This allows you to accommodate most space restrictions. This set includes two steel duct clamps that secure the aluminum tubing to your inline fan or other duct openings. Fastens the loop using a Phillips screw. AC Infinity is a technology company that specializes in environmental controls for audio/video and HVAC. The company was founded on the principle of working closely with customers to develop great products. Dependable service and a commitment to product quality are the foundations of the business's values. Visit the Store Visit the Store Visit the Store Visit the Store

Brand: AC Infinity


Material: Aluminum, Stainless Steel


Color: Black, Silver


Product Dimensions: 96"L x 4"W


Item Weight: 0.48 kg


Outside Diameter: 4 inches


Item Length: 8 feet


UPC:


Manufacturer: AC Infinity


Number of Packs: 1


Item Dimensions L x W: 96"L x 4"W


Item Weight: 0.48 kg


Outside Diameter: 4 inches


Item Length: 8 feet


Material Type: Aluminum, Stainless Steel


Color: Black, Silver


Brand Name: AC Infinity


UPC: 819137021020


Manufacturer: AC Infinity


Unit Count: 1 Count


Global Trade Identification Number: 20


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: within 30 days

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View our full returns policy here.

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Similar Products

Top Amazon Reviews

    • Durable, true to size ducting that resists kinking
Size: 4 Inch
The four layer build is the real difference here compared to thinner single layer ducting. The inner aluminum foil layer is fire resistant, and the outer thermoplastic layer adds real resistance to tearing and punctures while routing it through tight spaces. The internal steel wire spiral keeps the tube round and open even after bending it around obstacles, rather than collapsing or kinking the way cheap ducting tends to. It stretched to full length without issue and the diameter fit snugly over a standard inline fan connection, no fighting to get it seated. The two included clamps are good quality and cinch down tight for a proper seal. Works well whether the application is a grow tent, dryer vent, or general exhaust routing. ... show more
Reviewed in the United States on July 15, 2026 by Gabriel L. De Mattos
    • 5/5 Stars: Exceptional Quality and Durability!
Size: 6 Inch
Review Image by Mason
Review Image by Mason
Review Image by Mason
Unmatched Build Quality The standout feature of this ducting is its Heavy-Duty Four-Layer Protection. Unlike standard single-layer foil ducts that rip or crush the moment you try to maneuver them, this AC Infinity ducting feels remarkably robust and premium. Tear-Resistant: The thick, reinforced outer layer provides incredible durability, giving you confidence as you snake it through tight spaces or attics. Sleek Aesthetic: The matte black exterior not only looks much more professional than standard shiny foil, but it also helps block light—an essential feature if you are using this for an indoor grow tent exhaust system. Structural Integrity: The internal wire helix keeps its cylindrical shape beautifully, preventing sharp kinks or sags that could restrict your system's airflow. Effortless Installation Routing ventilation systems can often be a frustrating, tedious chore, but this product's design makes the process incredibly straightforward. Perfect Sizing: The 6-inch diameter is true to size, sliding snugly and securely over standard inline fans, carbon filters, and exhaust ports without a struggle. Generous Length: At 8 feet long, it offers plenty of flexibility and reach to route around obstacles without forcing you to buy and tape together multiple smaller pieces. Hardware Included: It is incredibly convenient that the package includes two high-quality stainless steel hose clamps. They tighten smoothly and provide a secure, airtight grip right out of the box. Versatile Performance Whether you are using it for heating, cooling, general ventilation, or dryer exhaust, this ducting performs flawlessly. It handles high-velocity airflow efficiently without the excessive rattling or whistling noises common with cheaper alternatives. Final Verdict: AC Infinity consistently delivers top-tier ventilation gear, and this ducting lives up to that high standard. With an impressive 4.6-star rating from over 19,000 reviews, it is clear that this is a tried-and-true staple for builders and homeowners alike. It is absolutely worth the investment for the peace of mind, durability, and ease of installation it provides. Highly recommended! ... show more
Reviewed in the United States on June 20, 2026 by Mason
    • Durable and Reliable 8-Inch Aluminum Ducting – Perfect for Ventilation and Exhaust
Size: 8 Inch
The AC Infinity Flexible 8-Inch Aluminum Ducting (8 feet long) is a fantastic choice for anyone setting up or upgrading a ventilation system. I use mine with an AC Infinity inline fan, and the results have been excellent—it moves air efficiently while staying strong and secure. The four-layer protection (dual aluminum foil, PET, and steel wire spiral) makes this ducting not only flexible but also very durable. It doesn’t tear or kink easily like cheaper ducting, and the extra thickness helps keep it from collapsing under pressure. The flexibility makes it easy to route through tight corners, and installation was straightforward with the included clamps. ✅ Pros: Heavy-duty four-layer construction for long-lasting use Flexible design makes installation easy, even in tight spaces Works perfectly with inline fans, grow tents, hydroponics, and HVAC setups 8-foot length is versatile for most setups Comes with sturdy clamps for secure attachment ❌ Cons: A little stiffer than thinner ducting, but that’s the tradeoff for durability At 8 feet, you may need extensions for larger setups 💡 Tips: Use with an AC Infinity inline fan for maximum airflow efficiency. When cutting to size, make sure to trim cleanly and secure ends tightly with clamps to avoid air leaks. If using in a miner room or greenhouse, pair it with a soffit vent to direct air outside effectively. Avoid bending too sharply—keep smooth curves for better airflow. Bottom Line: This ducting is built to last and does its job extremely well. Whether you’re cooling a miner setup, venting a grow tent, or upgrading your HVAC system, the durability and flexibility make it worth the investment. ... show more
Reviewed in the United States on August 30, 2025 by Kenny Campbell
    • Not cat proof
Size: 8 Inch
quality of materal is good but watch the length. I got one a few months ago to exaust a fan outsid and during a rain storm a cat tried to get in through it and it fell from the ceiling it was mounted on and the cat freaked out and riped it up. So I got a new one ( ducting not cat ) and want to install it and its 1.5ft shorter. Kinda odd being I just went to my history and hit Buy Again. I had to remount the fan closer to the exit spot. other then cat proof and length issues its a good product. ... show more
Reviewed in the United States on May 18, 2026 by WarDragon
    • High Quality!
Size: 6 Inch
Top quality tubing. Works great for the grow tent. I also have the same tubing for out portable air conditioner. It stays cooler in our bedroom since changing out the cheap plastic tubing that came with the AC unit.
Reviewed in the United States on July 22, 2026 by Adam
    • High quality
Size: 8 Inch
These ducts are really high quality. They are the size theu claim to be. They are light weight. They expand to the proper size easily, and almost "click" back to smaller lengths instead of becoming a mess. They do have a little thing of tape on each end, that is kind of hard to get off, not that hard, but ya might groan a few times. With the included clamps they form great seals and are easy too attach. They take a beating too... worth the extra few bucks in my mind. I have horror stories about lesser flexible ducts. ... show more
Reviewed in the United States on November 8, 2025 by C.K.
    • Surprisingly Good - Sturdy Vent Hose with good quality
Size: 4 Inch
Metal dryer vent from Lowe's was very flimsy and tore easily causing dryer to not dry well. I came on Amazon to find a replacement and there are tons of Chinese items. I ended up checking out virtually all of the options and landed on one that also had a coating on the outside to make it stronger. I can say that the plastic coating does exactly that: it helps control the hose while installing, has a good feel, and is sealed properly around the vent. My item came properly sized and it fit around both hose hookups. You'll notice reviews saying some of the hoses out there are too small which renders it unusable. Also I recommend getting clamps like the one below or something similar which makes installing the hose WAY easier and the cost of the clamp is less as well. -POWERTEC 70120 4 Inch Key Hose Clamp ... show more
Reviewed in the United States on August 11, 2024 by BTideRoll
    • Durable, Flexible, and Works Perfectly!
Size: 6 Inch
This AC Infinity 6-inch aluminum ducting is excellent quality! The four layer construction feels very sturdy and heavy-duty, yet it’s flexible enough to easily route through tight spaces. Installation was straightforward, and it works perfectly for both ventilation and exhaust applications. It’s long enough at 8 feet to handle most setups, and it holds up well without kinking or collapsing. Highly recommend for anyone looking for durable and reliable ducting for HVAC, grow rooms, or other airflow needs. ... show more
Reviewed in the United States on September 30, 2025 by ThatNewGuy

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