GAS EC5 Fan Controller | Reactive Temperature Technology for EC Inline Fans

Precision EC Fan Control with Reactive Temperature Technology.

The GAS EC5 Fan Controller is a dedicated EC fan control system built for growers who want complete, intelligent management of their intake and extraction ventilation. Developed by Global Air Supplies specifically for indoor climate rooms, the EC5 goes beyond basic thermostat control. Reactive Temperature Technology (RTT) gives the controller a built-in microchip that actively monitors your environment and responds proportionally to temperature changes, whether that is a gradual rise requiring a measured speed increase or a sudden spike demanding an immediate response. The result is a grow room that stays within your target range without the temperature swings that basic on and off controllers produce.

The EC5 plugs directly into any Systemair EC fan with no power pack required, drawing power from the fan itself for a clean, cable-efficient setup. Fan balancing for both intake and exhaust is built in, allowing you to dial in negative pressure and prevent odour escape without a separate balancer unit. For growers running EC fans who want intelligent, integrated climate control, the EC5 is the purpose-built solution.

Key Benefits

• Reactive Temperature Technology (RTT). Built-in microchip monitors your climate room continuously. Responds gradually to small temperature rises and rapidly to sudden spikes, keeping conditions stable without overshooting.
• Integrated Fan Balancer. Control and balance both intake and exhaust EC fans from a single unit. Set negative pressure directly on the controller without a separate balancer.
• Set Maximum and Minimum Fan Speeds. Define the operating range for both intake and extraction independently, giving you precise control over airflow at all times.
• Negative Pressure Control. Dial in the ideal negative pressure to prevent odours from escaping your grow space without relying on additional hardware.
• No Power Pack Required. The EC5 draws power directly from your EC fan. Cleaner setup, fewer cables, one less thing to manage.
• Direct Systemair EC Fan Compatibility. Plugs directly into the full Systemair EC fan range for seamless integration.
• Plug and Play Setup. No complex wiring or programming. Connect to your EC fan and configure your settings.
• 12-Month Warranty. Backed by GAS manufacturer warranty.

How It Works

The EC5 connects directly to your Systemair EC fan and draws its operating power from the fan itself. The built-in RTT microchip reads ambient temperature continuously and adjusts fan speed in proportion to how far conditions have drifted from your set point. A small rise gets a measured response. A sudden spike gets an immediate one. The fan balancing system lets you set independent speed ranges for intake and exhaust, with negative pressure control built in so your room stays sealed against odour escape. Everything is managed from one controller, with no additional hardware required.

System Features

• Control Type. EC fan speed control with Reactive Temperature Technology.
• RTT Microchip. Proportional temperature response, gradual and rapid spike management.
• Fan Balancing. Integrated intake and exhaust balancing with negative pressure control.
• Speed Settings. Adjustable maximum and minimum fan speeds for intake and extraction independently.
• Power Source. Powered directly from EC fan. No power pack required.
• Compatibility. Plugs directly into all Systemair EC fan ranges.
• Setup. Plug and play, no programming required.
• Warranty. 12 months.

Applications

• EC Fan Climate Control for Grow Rooms. Intelligent temperature-based speed regulation for Systemair EC inline fans in sealed and semi-sealed grow environments.
• Intake and Extraction Fan Balancing. Synchronise and balance both fans from one controller to maintain negative pressure and prevent odour escape.
• Hydroponic Ventilation Automation. Reactive temperature control keeps VPD and canopy conditions stable across the full crop cycle.
• Grow Tent Negative Pressure Management. Built-in pressure control eliminates the need for a separate balancer unit in sealed tent setups.
• Systemair EC Fan Integration. Purpose-built for the full Systemair EC range, including the Revolution EC inline fan.
• Advanced Grow Room Climate Control. For growers who have moved beyond basic thermostat controllers and want proportional, intelligent fan management.

What Sets It Apart

The EC5 is not a general-purpose fan controller adapted for EC fans. It is built specifically for EC fan systems, with RTT microchip technology that understands the difference between a gradual temperature drift and a sudden spike and responds to each appropriately. The integrated fan balancer and negative pressure control remove the need for separate hardware, keeping your setup clean and your points of failure low. And because it draws power directly from the fan, there is no power pack to manage or fail. For growers running Systemair EC fans who want the most capable, purpose-built controller for their system, the EC5 is the direct answer.

Enviro, Enviro V2, or EC5: Which GAS Controller Is Right for You?

GAS makes three controllers suited to different levels of grow room automation. Here is how they compare:

• GAS Enviro (Original). Simple dial-based temperature control for AC and EC fans. Best for straightforward setups and growers wanting basic automation at an accessible price point.
• GAS Enviro V2. Adds humidity control, dual programmable sockets, integrated fan balancing, and an LCD display. Best for larger or more advanced setups requiring full environmental automation across temperature, humidity, and auxiliary equipment.
• GAS EC5 (this model). Purpose-built for EC fans with Reactive Temperature Technology, built-in fan balancing, negative pressure control, and direct Systemair EC fan compatibility. No power pack required. Best for growers running EC fans who want intelligent, integrated climate control from a single dedicated unit.

The EC5 pairs directly with the Revolution EC Silent Inline Fan by Systemair for a complete, high-performance EC ventilation system.

Technical Specifications

• Control Type. EC fan speed, temperature-based with RTT
• Technology. Reactive Temperature Technology (RTT) microchip
• Fan Balancing. Integrated intake and exhaust, with negative pressure control
• Speed Control. Adjustable max and min for intake and extraction
• Power Source. Powered from EC fan, no power pack required
• Compatibility. All Systemair EC fan ranges
• Setup. Plug and play
• Warranty. 12 months
• Manufacturer. GAS (Global Air Supplies)

Frequently Asked Questions

What fans is GAS EC5 Fan Controller compatible with?

GAS EC5 Fan Controller is designed to work with compatible inline fans. EC controllers require EC-motor fans for full variable-speed control — they are not compatible with standard AC-motor fans. AC fan controllers work with standard single-phase AC fans. Check the compatibility list for your specific fan model before purchasing GAS EC5 Fan Controller if you are retrofitting to an existing setup.

How does GAS EC5 Fan Controller automate my grow room climate?

GAS EC5 Fan Controller monitors temperature and/or humidity via its onboard or external probe and automatically adjusts fan speed to maintain your target setpoints. When temperature rises above your target, fan speed increases to extract warm air. When temperature drops, fan speed reduces to conserve heat. This removes the need for manual fan adjustments and keeps your grow room dialled in 24/7.

Can I use GAS EC5 Fan Controller with both my intake and exhaust fans?

Most fan controllers including GAS EC5 Fan Controller are designed to control your primary exhaust fan. Some models include dual-channel control for both intake and exhaust. Check the number of output channels and maximum load rating before connecting multiple fans — never exceed the controller's maximum amperage rating.

Does GAS EC5 Fan Controller ship fast within Australia?

Yes — GAS EC5 Fan Controller ships from our Australian warehouse with fast tracked delivery Australia-wide. Most east coast orders arrive within 2–5 business days. WA, NT, and TAS orders typically arrive within 5–12 business days.