5m Black Combi Ducting 102mm (4") — Dual-Layer Light-Tight

5m Black Combi Ducting 102mm (4") — Dual-Layer Light-Tight Construction

Combi-Ducting is used as part of your ventilation system to move air to and from the grow area — replenishing CO₂ and removing excess heat and humidity. Dual-layer construction with aluminium inner and plastic outer greatly increases tear resistance while preventing light leaks. The mid-length 5m size is right for typical home grow-room layouts where 2.5m is too short and 10m is excess.

Why growers choose 5m Black Combi:

• 5m length — middle-ground between 2.5m and 10m, suits most home grow rooms
• 102mm (4") diameter — fits 4" fan and filter setups
• Dual-layer construction — aluminium inner + plastic outer for tear resistance
• Black outer prevents light reflection — no light leaks through the ducting
• Improves tear resistance — survives years of grow-room use
• Light-tight for sealed dark cycles — proper photoperiod discipline
• Universal compatibility — fits any 4" fan/filter setup

Who it's not for:

For 6", 8", 10" extraction (more common UK home-grow sizes), check matching diameter variants. For acoustic noise reduction, RAM Sonoduct or Phonic Trap deliver better noise control at higher cost. For very short runs, 2.5m is cheaper; for long runs, 10m is better value than multiple 5m sections. Pair with proper duct clips (Jubilee or METU Pro Fast Clamps) for secure airtight connections.

In stock now — ships same working day from our Staffordshire warehouse with free UK delivery over £100. Pick up in-store at our Stone shop (ST15 0SR) if you're local, or click & collect at checkout.