Ona Air Cyclone Fan - 5-Speed Active Odour Control for 20L Ona Gel Tubs
Best for: growers using a 20-litre Ona gel tub who want faster, more powerful odour neutralisation than passive evaporation alone provides.
Our thoughts
A tub of Ona gel on its own relies on slow evaporation to do its job, which works but isn't fast. Bolt this fan on top and you're actively pushing the odour-neutralising agent into the air instead of waiting for it to drift out on its own - genuinely useful if you're dealing with a bigger space or need results quickly.
The Ona Air Cyclone Fan is a fan unit designed to sit directly on top of a 20-litre Ona gel tub, actively drawing the odour-neutralising agent up and distributing it into the room rather than relying on passive evaporation. It runs on a 5-speed selector with an LED display showing the current speed, controlled with simple up/down buttons, so you can dial output from gentle and quiet through to full power depending on room size and how much odour control you need.
At its rated output, the fan can distribute the gel's odour-neutralising agent across a medium to large room, up to around 464 square metres (5,000 square feet), while drawing very little power - 7.2 watts or less - and moving air at roughly 121 cubic feet per minute (CFM). On the lowest setting it runs quietly for gentle, ongoing treatment; higher settings suit larger rooms or situations needing more aggressive odour control.
How it compares
Active gel dispersal sits alongside carbon filtration as one of two main approaches to grow-room odour control, tackling the problem differently.
- Compared to a passive Ona gel tub with no fan, this actively speeds up and extends the coverage of the odour-neutralising agent rather than relying on ambient air movement
- Against a carbon filter on your extraction line, this neutralises odour at the source in the room rather than filtering air as it's extracted - the two methods work well together rather than replacing each other
- Compared to aerosol air fresheners, Ona's gel-based neutralising agent breaks down odour molecules rather than just masking them with a stronger scent
If you already run carbon filtration but still get odour escaping, or want a fast-acting backup, this active fan unit adds a meaningful extra layer of control.
Usage guidance
Setup
Fit the Cyclone Fan unit directly onto a 20-litre Ona gel tub, positioned somewhere central to the space you're treating for the most even distribution.
Choosing a speed
Start on a low speed for ongoing, quiet background treatment in a smaller space; step up through the 5 speeds for larger rooms or when you need more aggressive short-term odour control.
Gel life
Running on higher speeds will use up the gel faster than passive evaporation, so keep an eye on tub levels and top up before it runs dry, especially if running continuously at higher settings.
Technical specifications
- Compatible with: 20-litre Ona gel tub
- Speed settings: 5-speed, plus off
- Display: LED speed indicator with up/down controls
- Power consumption: 7.2W or less
- Airflow output: Approx. 121 CFM
- Maximum coverage: Up to 464m² (5,000 sq ft)
Who this is for
- Growers with a larger space who need odour control to reach further than passive gel alone
- Anyone running carbon filtration who wants an extra layer of in-room odour neutralisation
- Growers who want adjustable, on-demand odour control rather than a fixed passive tub
Best suited to medium-to-large grow spaces or anyone needing faster odour control than passive evaporation gives.
Our take
This is a simple, low-power way to get much more out of an Ona gel tub than leaving it to evaporate passively - the 5-speed control gives you real flexibility between quiet, gentle treatment and full-power odour control when you need it.
Does exactly what it should, day in, day out - a smart add-on if you're already using or considering Ona gel for odour control.
