Vortex Black Combi-Ducting - 5 Metre Length

Vortex Black Combi-Ducting – 5 Metre Flexible Ventilation Duct

Best for: Growers who want tear-resistant, light-proof ducting without paying premium acoustic prices

Vortex Black Combi-Ducting is a double-layer flexible ventilation duct that combines durability, light-proofing, and ease of installation in one straightforward package. The aluminium and polyester inner shell is supported by a steel wire helix and wrapped in a black PVC outer layer — giving you strength and airtightness without the premium markup of acoustic ducting.

This is the sensible middle ground between standard aluminium ducting (which tears easily) and expensive acoustic alternatives. It does the job properly, won't split when you're rerouting runs, and blocks light completely. At 5 metres, you've got enough length for most tent and room setups without needing multiple sections.

How it compares

Combi-ducting sits in the smart-value ventilation tier — better than standard, cheaper than acoustic.

• vs. Standard aluminium ducting: Significantly more tear-resistant; black outer prevents light leaks; roughly double the durability at a fraction of acoustic pricing
• vs. Acoustic/ultra-silent ducting: Less noise reduction, but costs a third of the price; still quieter than single-layer aluminium
• vs. Single-layer flexible ducting: Reinforced wire helix maintains cross-section better; holds shape under tension; genuine airtight seal

In plain terms: you're getting proper ventilation ducting that won't tear itself apart after a few months of use.

Usage guidance

Extraction and intake
Combi-ducting works cleanly for both pulling air out of your space and drawing fresh air in. Connect it directly over the flange of your extraction fan or filter using an appropriately sized duct clip. Make sure it's as fully extended as possible — stretched runs are quieter and more efficient than slack loops.

Routing and installation
This is where combi really shines. It concertinas down tightly if needed and bends around corners without creasing or losing its shape. If you need to cut it to length, use sharp scissors for the aluminium and wire cutters for the steel helix.

Temperature range
Rated to 140°C, so it handles the heat from extraction fans without degrading. Not something you'll need to worry about in normal indoor growing setups.

Maintenance
Keep it extended to stop dust collecting inside. Periodically check duct clips are tight — vibration can loosen them over time.

Technical specifications

• Length: 5 metres (also available in 10-metre variant)
• Diameter options: 100mm to 315mm (4" to 12.5")
• Construction: Dual-layer — aluminium and polyester inner shell with steel wire helix reinforcement and black PVC outer sheath
• Material properties: Fully airtight; light-proof; tear-resistant; maintains cross-sectional area under airflow pressure
• Temperature rating: Up to 140°C
• Flexibility: Concertinas to short lengths; bends around corners without kinking
• Installation: Fits directly over matching-diameter fan flanges; secures with standard duct clips

Who this is for

• Growers upgrading from standard aluminium ducting that keeps splitting
• Budget and mid-range setups where durability matters but acoustic ducting feels like overkill
• Anyone building a ventilation system for the first time who wants reliable kit without overcomplicating things
• Growers using larger-diameter runs (where standard ducting sags and tears more easily)
• Anyone installing in light-sensitive spaces where ducting holes are a problem

Our take

This is proper ventilation ducting that does exactly what it should — moves air efficiently, doesn't tear, blocks light, and holds up to repeated adjustments. It's not the quietest option on the market, but it's substantially cheaper than acoustic alternatives and miles better than the single-skin stuff.

At clearance pricing, well worth picking up while stock lasts. One of those basics you'll always need more of, and this version actually lasts.