GAS Fan Balancer for Vector EC Fans — Negative Pressure Control Without the Complexity
Best for: Vector EC fan users wanting to dial in perfect negative pressure without buying a full controller
Our thoughts
If you're running two Vector EC fans and want to balance them properly, this is the straightforward answer. Plug it in, set your intake and outtake speeds independently, and stop wrestling with tent bulge. German engineering doing exactly what it should.
The GAS Fan Balancer is a dedicated negative pressure controller designed specifically for SystemAir Revolution Vector EC Fans. It connects to your intake and extraction fans, then to your GAS EC fan controller, allowing you to run two same-size fans and balance them independently. Instead of one fan fighting the other, you get precise control over negative pressure — which is the difference between a stable room and a bulging tent.
How it compares
There are several ways to control EC fans. The GAS Balancer sits in the standalone add-on category:
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All-in-one controllers (GAS EC5, Rhino 2EC+RH): Built-in balancer plus temperature control in a single unit — more expensive, more features
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Y-splitters alone: Run both fans at the same speed — no independent control, no pressure balancing
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GAS Fan Balancer: Standalone precision tool for existing Vector EC setups — lower cost, solves the specific problem of pressure imbalance
Think of it this way: if you already have Vector fans and a basic controller, this adds the missing piece. If you're starting fresh and want everything in one box, a full controller makes sense. This one's for people who just need the balancing sorted.
Usage guidance
The balancer solves one core problem: when your extraction fan is fighting your intake fan, your tent bulges and your filter doesn't do its job properly.
Standard negative pressure setup
Run your intake fan at, say, 70% and your extraction fan at 85%. Air gets pulled through the filter, odours stay contained, and neither fan is overworked. The balancer lets you adjust these independently in 1% increments until it feels right.
Using matched intake and extraction fans
This is where the balancer really earns its place. With two identical fans, the extraction side needs more power because the filter creates resistance. Without balancing, you either get positive pressure (tent bulges, smell leaks) or you overtax the extraction fan. The balancer lets you dial this in precisely.
Fine-tuning your room climate
Negative pressure isn't just about odour control — it's fundamental to temperature and humidity stability. Tight control over fan speeds means tighter environmental control. Pair this with a GAS Enviro V2 or Enviro4 and you've got a properly managed space.
Installation
Plug-and-play. Connect your intake fan to one port, extraction fan to the other, then plug the balancer into your GAS EC controller. No configuration hassle, works straight out the box.
Technical specifications
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Compatibility: SystemAir Revolution Vector EC Fans only
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Requires: GAS EC fan controller to operate
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Fan speed control: 0–100% in 1% increments
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Temperature display: Min/max temperature readout in °C or °F
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Operation: Silent — no humming from fans or controller
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Installation: Plug-and-play, no additional setup required
Who this is for
- Growers running two Vector EC fans who want independent speed control
- Anyone dealing with tent bulge or positive pressure problems
- Existing Vector EC fan users looking to upgrade without replacing their setup
- Serious growers who want precision control over negative pressure
- Budget-conscious setups where a full integrated controller isn't justified yet
Particularly well suited to growers who understand that negative pressure is a critical part of climate control, not just a nice-to-have.
Our take
This is a focused tool that does one job properly: balancing intake and extraction so your room breathes the way it should. No unnecessary features, no premium markup, just solid German engineering built specifically for Vector fans.
If you're already running Vector EC fans and struggling with pressure control, this is a good time to buy while clearance stock lasts. Does exactly what it should, day in, day out.
