Mammoth TT Twin Speed Inline Fan — Dual-Speed Extraction Without the Fuss
Best for: Growers wanting adjustable airflow without smart controllers, complex wiring, or premium pricing
Our thoughts
This is the kind of fan that does exactly what you need it to do, without trying to be clever about it. Two speeds, no controller to faff with, and it arrives ready to plug in. One we shift a lot of because new growers don't want to overthink ventilation — they just want it to work. At this price, it's a no-brainer for small to medium setups.
The Mammoth TT Twin Speed Inline Fan is a plug-and-play extraction solution that lets you switch between two airflow rates with a simple press of a button. No wiring, no separate controller, no drama. It's powered by proven Vortex technology and comes with everything you need in the box — including the power lead and hanging bracket. The whole point: you get the flexibility of two fans without paying for two fans or dealing with unnecessary complexity.
How it compares
The Mammoth TT sits in the smart-value segment of inline fans, positioned between budget single-speed models and premium smart-controlled systems.
- Dual speed gives you the control of smart fans without the app, app-learning curve, or extra cost
- Mechanical switch is more reliable and simpler than PWM controllers for straightforward growers
- Fully plug-and-play — arrives ready to use, no electrician required
- Significantly cheaper than AC Infinity or Vortex standalone models, and honestly? It outperforms single-speed fans at half the price
If you're weighing this against a cheap single-speed fan, the extra tenner for dual-speed adaptability is money well spent. If you're looking at AC Infinity's smart ecosystem, this is for growers who don't need app control and want to keep things simple.
Usage guidance
The Mammoth TT works across different growing stages and seasons:
Early growth & seedlings
Run on the lower speed setting. Seedlings need continuous fresh air but can struggle with harsh airflow. Low speed prevents wilting and disease without stress.
Peak growth & warm months
Bump to high speed when temperatures climb or humidity builds. The fan quickly adapts to seasonal changes without needing a second piece of kit.
Extraction setup
Mount near the top of your tent or ceiling, connect your ducting, attach a carbon filter if needed, and plug in. Works equally well pulling stale air out or pulling fresh air in — just remember to draw in about 20% less air than you extract so nothing seeps out before filtering.
Noise & heat management
Runs at 26dB on low speed — genuinely whisper-quiet. If the motor gets too hot, built-in thermal protection cuts it off automatically, so you don't risk damage from a fan left running all day.
Technical specifications
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Models available: 100mm (4"), 125mm (5"), 150mm (6"), 200mm (8")
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4" model airflow: 165 m³/hr (low) / 198 m³/hr (high)
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5" model airflow: 248 m³/hr (low) / 284 m³/hr (high)
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6" model airflow: 410 m³/hr (low) / 530 m³/hr (high)
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Noise level: 26dB (low) / 31dB (high)
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Build: IP65 water-resistant, dust-tight, sealed bearings
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Safety: Thermal overload protection
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Power: 220/240V, supplied with 1.8m mains lead
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Warranty: 2 years manufacturer's
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Installation: Integrated hanging bracket, quick-release mechanism for cleaning
Who this is for
- First-time growers who want ventilation without overthinking it
- Growers running small to medium tents (up to a 600W light on the 5" model)
- Stealth growers prioritising quiet operation
- Anyone who's been caught out by a cheap single-speed fan that's either too weak or too loud
- Growers who want flexibility across seasons without buying a separate fan or controller
Not suited to large commercial setups — this is built for hobby growers and rooms up to about 1.2m².
Our take
This is proper extraction kit at a price that makes sense. Dual-speed adaptability without the smart-system markup, noise you can actually live with, and the kind of reliability that means it'll be running the same in year two as it was on day one.
End-of-line stock, so you're getting a working inline fan at a much lower price than usual. Worth picking up while clearance lasts — does exactly what it should, day in, day out.
