G.A.S EC Fan Speed Controller - Manual Speed and Balance Control for EC Fan Pairs
Best for: growers who want simple manual speed control and balancing across an intake and outtake EC fan pair, without paying for a thermostat.
Our thoughts
This is the entry point into G.A.S's EC controller range - no thermostat, just two knobs to set your fan speeds and balance intake against outtake. If you already know roughly what speed you want your fans running at and don't need automatic temperature response, there's no reason to pay for the EC2 or EC5's extra electronics.
The G.A.S EC Fan Speed Controller lets you regulate two EC fans - typically an intake and an outtake - from a single device using two variable control knobs. It's powered directly from the fan via its Active Cable, so there's no separate power pack to wire in.
It plugs directly into any fan in the Systemair range fitted with active cables (the white connectors), and comes with a 5 metre Active Male-to-Male cable so you can connect a Vector EC fan straight out of the box. Set your intake and outtake fan speeds independently, then use the balance function to create the negative pressure most grow rooms need to keep odours contained.
How it compares
Within G.A.S's own EC range, this is the manual-only starting point.
- Versus the G.A.S EC2: the EC2 adds full thermostatic control on top of the same balancing function.
- Versus the G.A.S EC1: the EC1 is also thermostatic, aimed at slightly smaller 1W setups.
- Versus AC controllers like the Vortex Thermostatic Fan Speed Controller: those add automatic temperature response but only work with AC fans, not EC.
If you're confident setting your own fan speeds and just want balancing sorted, this covers it without paying for a thermostat you won't use.
Usage guidance
Setup is straightforward with no wiring beyond the supplied cable.
Installation
Connect to your intake and outtake EC fans via their Active Cables - the supplied 5m male-to-male cable will connect a Vector EC fan directly.
Setting fan speeds
Use the two control knobs to set your intake and outtake speeds independently to suit your extraction needs.
Balancing
Adjust the balance function so your outtake slightly outpaces your intake, creating negative pressure and helping contain odours.
Technical specifications
- Control type: Manual EC fan speed control with balancer, no thermostat
- Manufacturer: Global Air Supplies (G.A.S UK)
- Power supply: Fan-powered via Active Cable - no separate PSU required
- Compatible fans: Systemair range fitted with white Active Cable connectors
- Included cable: 5m Active Male-to-Male cable
- Outputs: 2 (intake and outtake)
- Balancing: Manual balance dial for negative pressure
Who this is for
- Growers who want manual speed control over a matched pair of EC fans
- Anyone who doesn't need automatic thermostatic response
- Budget-conscious growers stepping up from unbalanced single-fan setups
Best suited to growers comfortable setting and leaving their fan speeds rather than relying on automatic adjustment.
Our take
There's no dressing this up as more than it is - it's a simple, effective way to set and balance two EC fans, and it does that job properly. For a lot of setups, that's genuinely all you need.
If you do not need a thermostat, this covers the job well at a price that makes sense.
