Air Duct - 4 in x 25 ft - Flexible Aluminum Ducting

Flexible Intake and Exhaust Ducting for Tight Spaces - 25 ft Run

Moving air between fans, filters and vents is hard when rigid pipe will not bend around lights, walls and equipment. This flexible aluminum duct bends to fit, and its built-in wire helix holds the round shape. The light-proof aluminum body suits intake and exhaust runs.

At 4 in diameter and 25 ft fully extended, one length covers a typical room or tent setup and can be cut shorter for smaller runs. It suits regular indoor growers and hobbyists who want one flexible run for a fan or filter.

Key Features & Benefits

• Flexible wire helix reinforcement — bends around obstacles and resists tearing and punctures.
• Light-proof aluminum construction — blocks light along the air path.
• Flame resistant aluminum — adds a margin of safety near warm equipment.
• Corrosion-resistant helix — supports lasting performance in humid spaces.
• 4 in x 25 ft fully extended — one length for most single runs.

Who Should Use This Air Duct

Growers running grow rooms, tents or greenhouses who need flexible intake or exhaust piping. It also suits any space that needs ventilation ducting, such as kitchens and bathrooms.

About This Air Duct

This is a flexible aluminum ventilation duct, 4 in in diameter and 25 ft long when fully extended. It is reinforced with a spring steel wire helix and is sold individually. The distributor lists a temperature range of 0 to 185°F.

Frequently Asked Questions

Q: What size is this duct?
A: It is 4 in in diameter and 25 ft long when fully extended. It is sold as a single length.

Q: Can I use it for both intake and exhaust?
A: Yes. It is designed for intake and exhaust piping. Match the 4 in diameter to your fan, filter or vent collar.

Q: Why does the duct need to be fully extended?
A: The 25 ft length is measured fully extended. Stretching it out reduces ridges that slow airflow, so use only as much length as the run needs.

Q: What is a wire helix?
A: It is a coiled wire built into the duct wall. It keeps the tube round and lets it bend without collapsing.

Q: What temperatures can it handle?
A: The distributor lists a range of 0 to 185°F. Keep it away from heat sources beyond that range.