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

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.

Used this for my 3D printer exhaust setup and it works great. Pretty sturdy and fitted perfectly around the mounts I printed!

Easy to install and super sturdy so far. Way cheaper and easier to use than a ridged aluminum piping.

Works as it should

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.

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.

Good quality item. Works exactly as it should. Would definitely buy more of this brand. I have an inline blower from them and that is also top quality.

We run a foundation repair company and install a couple of hundred crawl space and basement drainage systems a year. We install scores of dehumidifiers. These 8' and 25' ducts are the best I have found to use with a dehumidifier. We highly recommend them.