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

Precision EC Fan Control with Reactive Temperature Technology.

The GAS EC5 is a dedicated EC fan control system for growers who want full management of intake and extraction ventilation. Global Air Supplies built it for indoor climate rooms, and it goes well past basic thermostat control. Reactive Temperature Technology (RTT) puts a microchip in the controller that monitors your environment and responds in proportion to what's happening, whether that's a gradual rise needing a measured speed increase or a sudden spike needing an immediate one. Your room stays inside its target range without the temperature swings basic on-and-off controllers produce.

The EC5 plugs into any Systemair EC fan with no power pack, drawing power from the fan itself for a clean, cable-efficient setup. Fan balancing for intake and exhaust is built in, so you can dial in negative pressure and stop odour escaping without a separate balancer unit.

Key Benefits

• Reactive Temperature Technology (RTT). A built-in microchip monitors your climate room continuously. It responds gradually to small rises and rapidly to sudden spikes, holding conditions steady without overshooting.
• Integrated fan balancer. Control and balance intake and exhaust EC fans from one unit. Set negative pressure on the controller without a separate balancer.
• Set maximum and minimum fan speeds. Define the operating range for intake and extraction independently for precise control over airflow.
• Negative pressure control. Dial in the negative pressure your space needs to stop odours escaping, without extra hardware.
• No power pack required. The EC5 draws power from your EC fan. Fewer cables and one less thing to manage.
• Direct Systemair EC fan compatibility. Plugs into the full Systemair EC fan range.
• Plug and play setup. No complex wiring or programming. Connect it to your fan and set it up.
• 12-month warranty. Backed by GAS manufacturer warranty.

How It Works

The EC5 connects to your Systemair EC fan and takes its operating power from the fan. The RTT microchip reads ambient temperature continuously and adjusts fan speed in proportion to how far the room has drifted from your set point. A small rise gets a measured response. A sudden spike gets an immediate one. The balancing system lets you set independent speed ranges for intake and exhaust, with negative pressure control built in to keep the room sealed against odour escape. It all runs from one controller with no extra hardware.

System Features

• Control type. EC fan speed control with Reactive Temperature Technology.
• RTT microchip. Proportional temperature response, handling gradual drift and sudden spikes.
• Fan balancing. Integrated intake and exhaust balancing with negative pressure control.
• Speed settings. Adjustable maximum and minimum speeds for intake and extraction independently.
• Power source. Powered from the 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. Temperature-based speed regulation for Systemair EC inline fans in sealed and semi-sealed spaces.
• Intake and extraction fan balancing. Synchronise both fans from one controller to hold negative pressure and stop odour escape.
• Hydroponic ventilation automation. Reactive temperature control keeps VPD and canopy conditions stable across the crop cycle.
• Grow tent negative pressure management. Built-in pressure control removes the need for a separate balancer in sealed tent setups.
• Systemair EC fan integration. Built for the full Systemair EC range, including the Revolution EC inline fan.
• Advanced grow room climate control. For growers past basic thermostat controllers who want proportional fan management.

What Sets It Apart

The EC5 was built for EC fan systems from the start rather than adapted from a general-purpose controller. Its RTT microchip tells the difference between a gradual temperature drift and a sudden spike and responds to each appropriately. The integrated balancer and negative pressure control remove the need for separate hardware, which keeps the setup clean and the failure points low. Because it draws power from the fan, there's no power pack to manage or fail. If you're running Systemair EC fans and want the most capable controller for that system, the EC5 is it.

Choosing Between the EC2, EC5 and Enviro V2

GAS makes controllers for different levels of grow room automation. Here's how they compare.

• GAS EC2. EC fan speed control and balancing with negative pressure, and no temperature automation. Best when you want to set your speeds and pressure once and leave them.
• GAS EC5 (this model). Everything the EC2 does, plus Reactive Temperature Technology so fan speed tracks room temperature proportionally. EC fans only. Best for growers running Systemair EC fans who want temperature-reactive control from one dedicated unit.
• GAS Enviro V2. Steps up to humidity as well as temperature, adds two programmable sockets for heaters, humidifiers and lights, and drives AC fans as well as EC. Best for sealed rooms where you're automating equipment alongside airflow.

The EC5 pairs directly with the Revolution EC Silent Inline Fan by Systemair for a complete 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)
• Product Weight. 0.8 kg
• Shipping. Free to VIC, NSW, QLD, SA and ACT

Frequently Asked Questions

What fans does the EC5 work with?

The full Systemair EC fan range, including the Revolution EC. It plugs into the fan and takes its power from there, so there's no power pack. It won't drive AC-motor fans, which need an AC controller instead. Check which motor your fan has before you buy if you're retrofitting to an existing setup.

Does the EC5 control humidity as well as temperature?

No, temperature only. The RTT microchip reads ambient temperature and scales fan speed to match how far the room has drifted from your set point. If you need humidity control, dual programmable sockets and auxiliary equipment switching, the Enviro V2 is the model that does that.

How is RTT different from a normal thermostat controller?

A basic thermostat controller switches between two states, so the room overshoots your target and then drops back past it. RTT scales the response to the size of the change. A slow rise gets a small speed increase, a sudden spike gets a large one, and the room settles closer to your set point instead of swinging around it.

Does it qualify for free shipping?

Yes. At $299.95 and 0.8kg it clears the $150 threshold and sits well under the 3kg cap, so it ships free to VIC, NSW, QLD, SA and ACT. WA, NT, Tasmania and remote areas are quoted separately. Most orders to those five states arrive within 2 to 5 business days.