The G.A.S EC5 Fan Controller gives you complete control over your intake and extraction system, allowing you to fine-tune your grow room environment with precision. Control your EC fans thermostatically, balance intake and extraction to achieve perfect negative pressure, and prevent unwanted odours from escaping — all without a separate balancer.The EC5 features Reactive Temperature Technology (RTT), a built-in microchip developed specifically for indoor climate rooms. RTT monitors temperature continuously: if there’s a sudden spike, the controller reacts quickly to stabilise conditions; if there’s a gradual rise, fan speed increases proportionally. The result is a stable, efficient environment with minimal manual intervention.Key Features Thermostatic control of EC intake and extraction fans Reactive Temperature Technology (RTT) for fast, intelligent response to temperature changes Set maximum and minimum fan speeds independently for intake and extraction Built-in fan balancer — set negative pressure without a separate device Plug-and-play — no power pack required, powered directly from your fan Compatible with all Systemair EC fan range 12-month warranty