Global Air - AC-EC Fan Speed Controller

One controller for mixed AC and EC fan setups

The Global Air AC-EC Fan Speed Controller is a digital climate controller that runs both AC and EC ventilation fans from a single unit, automatically adjusting speed to temperature and humidity to keep a grow tent or room stable across the whole cycle. Unlike basic controllers, it can drive AC intake fans and EC extraction fans together, and a built-in light sensor switches between separate day and night settings so ventilation responds correctly whether lights are on or off.

Struggling to keep humidity and temperature stable across day and night?

Swings in temperature and humidity slow vegetative growth and raise the risk of powdery mildew and botrytis during flowering, especially when day and night conditions differ. The AC-EC constantly monitors the room and adjusts fan speed to match, ramping airflow to shift heat and humidity, then easing back for quiet, efficient running once conditions settle, so plants always get the fresh air they need for strong growth and nutrient uptake.

Key Benefits

• Controls AC and EC fans together from one controller
• Automatic speed adjustment based on temperature and humidity
• Separate day and night settings switched by a built-in light sensor
• Two fan sockets for dedicated intake and extraction
• Prevents high-humidity issues like mould and mildew during bloom
• Compatible with Systemair EC fans and Hyper Fan V2 (with adapter cable)

What's Included

• 1 x G.A.S AC-EC Fan Speed Controller (EC control cables sold separately)

How to Use

• Install the controller in a dry, accessible spot near your ventilation system.
• Connect AC intake and extraction fans to the sockets (maximum 5A per socket).
• Connect any EC fans via the appropriate controller cables or adapters.
• Place the sensor probe at canopy height inside the grow space.
• Set temperature, humidity and fan-speed targets for both day and night; the controller then adjusts automatically to maintain them.