Duct Clips - Secure Flexi-Ducting to Fans and Filters
Best for: Anyone fitting flexible ducting onto an extraction fan, intake fan or carbon filter who needs a secure, airtight fix to the flange.
Our thoughts
Small part, but it's the difference between a duct that stays put and one that works loose mid-grow and starts leaking smells or dropping efficiency. We sell a lot of these alongside fans and filters because most people don't think about clips until they realise their duct's come away from the flange. Cheap enough to grab a spare while you're ordering the rest of your extraction kit.
A duct clip clamps flexible ducting securely onto the flange of an extraction fan, intake fan or carbon filter, stopping it slipping off under airflow pressure or its own weight. It sits over the ducting where it meets the flange and tightens down to create a firm, largely airtight seal, which matters for keeping your extraction efficient and smells contained.
They're sold in a choice of sizes to match the ducting diameters used in most home grow tents and rooms, so you pick the size that fits your existing ducting rather than a one-size-fits-all clip that's either too loose or won't close properly. It's a small, inexpensive part, but a duct that isn't properly clamped is one of the more common causes of reduced extraction performance and escaped odours in an otherwise well-set-up tent.
How it compares
Duct clips are the standard fix for this job across the UK grow trade, so the comparison is mostly about fit and build rather than brand.
- Does the same clamping job as duct tape around the join, but is reusable and gives a more consistent, adjustable grip than tape alone.
- Cheaper and quicker to fit than a full replacement of worn ducting or a flange repair.
- Available in multiple sizes, so it covers a wider range of fan and filter flanges than a single fixed-size clip.
It's a cheap, unglamorous part, but the right size clip properly tightened is what keeps your extraction sealed and running as intended.
Usage guidance
Choosing your size
Match the clip to the diameter of your ducting and flange, most home setups use 100mm, 125mm or 150mm ducting, so pick the clip size that corresponds to yours.
Fitting
Slide the ducting fully over the flange first, then position the clip over the overlap and tighten evenly around the full circumference so there are no gaps.
Checking the seal
Once fitted, give the duct a gentle tug, it shouldn't pull free or rotate loosely on the flange.
When to replace
If a clip has stretched, cracked or won't tighten fully any more, swap it out rather than relying on tape as a workaround.
Technical specifications
- Product type: Ducting flange clamp
- Sizes available: 3 sizes to suit standard extraction ducting diameters
- Use case: Securing flexi-ducting to fan and carbon filter flanges
- Fit: Reusable, adjustable clamp
- Compatible with: Standard round flexible ducting
Who this is for
- Anyone setting up a new extraction system and fitting ducting to a fan or filter
- Growers replacing a worn or stretched clip on an existing setup
- Anyone whose ducting has come loose from a flange and needs a proper fix rather than tape
- Buyers stocking up on spares alongside a new fan or filter order
Our take
Not exciting, but genuinely useful, this is the part that keeps your extraction airtight where it matters most, at the flange. Pick the right size and it'll outlast the ducting it's holding.
Cheap enough to add a spare to any extraction order. Does exactly what it should, day in, day out.
