Ducting

Types of ducting

Ducting carries air between your fan, carbon filter and vents. Which type you want depends on whether noise is a concern:

• Standard flexible ducting: PVC-coated and black insulated duct in 100mm to 250mm, plus AC Infinity four-layer duct — the everyday choice for moving air efficiently.
• Acoustic / noise-reducing ducting: insulated rockwool and polyester duct that wraps the airflow to soak up fan hum, in sizes from 100mm to 355mm. If your extraction is loud, this is the upgrade.
• Fittings and accessories: stainless duct clamps, Y-splitters, backdraft dampers, inline silencers, aluminium foil tape and grip tape to seal and join it all.

Sizing your ducting

Match the duct diameter to your fan and carbon filter spigots — stepping down a size restricts airflow and adds noise. We stock the common grow sizes from 100mm through to 355mm. Buy the duct a little longer than the straight-line distance so you can route around bends without stretching it taut; a stretched duct rattles and transmits more vibration.

Keeping it quiet

Two things cut extraction noise: acoustic ducting that absorbs sound along the run, and an inline silencer at the fan. Rockwool acoustic duct also adds heat insulation, while the polyester line is itch-free to handle — both come as 5m boxed lengths you cut to size. Pair either with a well-sized fan and you'll barely hear the room working.

Sealing and joining

Secure every connection with a stainless duct clamp, then wrap the joint in aluminium foil or PVC duct tape so air can't leak at the fan, filter or wall. To extend a run, join two lengths with a coupler and clamp both ends. Route with gentle bends rather than tight kinks — every sharp turn costs airflow.

Ducting is one part of the setup — pair it with grow tent fans and carbon filters to build a complete, quiet extraction system.