Rhino 2EC Fan Speed Controller - Balanced, Automatic Control for Two EC Fans
Best for: Growers running separate intake and extraction EC fans who need them balanced automatically rather than adjusted by hand.
Our thoughts
Getting intake and extraction fans properly balanced by hand is a fiddly, ongoing job - too much extraction and you're fighting negative pressure, too little and heat builds up. This controller takes that balancing act off your plate automatically, without paying for humidity sensing you might not need.
The Rhino 2EC Fan Speed Controller regulates the speed of two EC (electronically commutated) fans simultaneously, letting you fine-tune both your intake and extraction fans from a single unit to keep your grow space properly balanced. Running fans that are mismatched in speed is a common cause of excess negative pressure or poor air exchange, and this controller is built specifically to keep the two working in proportion to each other.
It's designed to be efficient and straightforward to use, automatically adjusting fan speed to maintain a balanced environment while also helping to optimise energy consumption compared with running fans at a fixed, unregulated speed. Unlike Rhino's 2EC + RH controller, this model focuses on fan speed balancing rather than full humidity and day/night climate automation.
How it compares
This sits as the more affordable entry point in Rhino's EC controller range, alongside a step-up model and comparable products from other controller brands.
- Against Rhino's own 2EC + RH Fan Controller, this model doesn't include a humidity sensor or separate day/night presets - it's focused purely on regulating and balancing fan speed rather than full climate automation.
- Against premium multi-sensor systems like TrolMaster's Hydro-X range, this is a simpler, more affordable option if fan speed balancing is genuinely all you need.
- Against manually adjusted EC fan speed dials, automating the balance between two fans removes a job you'd otherwise be doing by hand, and often by feel rather than measurement.
The sensible choice if you need two EC fans balanced properly, without paying for humidity sensing you don't need.
Usage guidance
Setup is straightforward and centres on getting your two fans wired in correctly.
Fan wiring
Connect your intake fan and extraction fan to the controller's respective outputs so their speeds can be regulated together rather than independently.
Balancing airflow
Adjust the controller so extraction slightly outpaces intake, maintaining a small amount of negative pressure in the space without letting it become excessive.
Ongoing adjustment
Revisit your settings if you add or remove equipment like a carbon filter, since extra resistance in the ducting will affect the balance between your two fans.
Technical specifications
- Fan control: Simultaneous speed regulation of 2 EC fans (intake and extraction)
- Function: Balances fan speed to manage negative pressure
- Compatibility: EC (electronically commutated) fans
- Energy: Helps optimise energy consumption vs fixed-speed running
- Sensing: Fan speed regulation focused - no humidity sensor
Who this is for
- Growers running separate intake and extraction EC fans who need them properly balanced
- Anyone who doesn't need humidity sensing or day/night preset automation
- Growers stepping up from manual fan speed dials to automatic regulation
Best suited to airflow balancing rather than full temperature-and-humidity climate control.
Our take
This controller does one job and does it well - keeping two EC fans properly balanced without the extra cost of humidity sensing you might not need. It's a genuinely useful step up from manual adjustment for anyone running a dual-fan setup.
Proper kit at a price that makes sense if fan balancing, not full climate automation, is what you're after.
