Mammoth S-Max - Quiet EC Extraction Fans for Grow Room Ventilation
Best for: growers who need serious extraction airflow without the noise or running costs of a standard AC fan.
Our thoughts
Mammoth's S-Max range is the fan we point people towards when they want proper airflow but don't want their whole house to know there's a grow room running. EC motors aren't cheap to make, but the running-cost and noise savings pay that back over time. Comes in four sizes, so there's a genuine fit whether you're running a small tent or a full room.
The Mammoth S-Max is an EC (electronically commutated) inline extraction fan, built with a lightweight aluminium casing lined with noise-dampening foam and an integrated speed controller so you can dial in airflow without buying a separate fan controller. EC motors use roughly half the energy of an equivalent AC fan while still generating high static pressure, and the S-Max range is built around the same Vortex EC motor technology used across Mammoth's Juiced EC fan line.
It's sold across four duct sizes - 6", 8", 10" and 12" - with the larger models pushing significantly more air, so there's a size to match anything from a single tent to a full grow room.
How it compares
EC fans are now the standard for anyone serious about extraction, and the S-Max holds a solid mid-to-upper position in that market.
- Uses roughly half the running power of an equivalent AC fan, such as a standard Vortex Powerfan Inline unit, for a similar airflow output
- Sits alongside RAM Astro EC fans and Vortex's own Powerfan EC range as one of the established silenced EC options UK growers choose
- Costs more upfront than an AC fan of the same duct size, but the lower running costs and reduced noise usually justify it for anything running more than a few hours a day
If quiet, efficient extraction matters more to you than the lowest sticker price, this is the fan to buy.
Usage guidance
Sizing
Match the duct size (6", 8", 10" or 12") to your existing ducting and grow space size - going too small for the space limits airflow regardless of the fan's rated output.
Speed control
Use the integrated controller to dial airflow up during lights-on hours and down overnight, rather than running at full speed constantly.
Noise reduction
Mount using anti-vibration ducting clamps or a fan hanger rather than a rigid fixing, since even a quiet EC fan will transmit some vibration noise through a hard-mounted bracket.
Technical specifications
- Brand: Mammoth
- Motor type: EC (electronically commutated)
- Duct sizes available: 6", 8", 10", 12"
- Casing: aluminium with noise-dampening foam lining
- Controller: integrated speed control, no separate unit needed
- Energy use: approximately half that of an equivalent AC fan
- Noise level: from around 50dB depending on size and speed setting
- Airflow (6" model): up to approximately 2987m3/hr
Who this is for
- Growers who need extraction for a full grow room, not just a small tent
- Anyone running lights and fans for long hours where running costs add up
- Growers in noise-sensitive locations, such as shared housing or converted spare rooms
- Upgraders moving on from a standard AC inline fan
Our take
The S-Max range does the one job a serious extraction fan needs to do - move a lot of air quietly and efficiently - across a size range that covers almost any setup. It's not the cheapest fan on the shelf, but the running-cost savings from the EC motor make up ground over a normal grow cycle.
Proper kit at a price that makes sense for what an EC fan actually saves you long-term.
