Global Air - EC Fan Speed Controller

Precise, plug-and-play control of two EC fans from one unit

The Global Air EC Fan Speed Controller from G.A.S gives simple, accurate speed control over two EC ventilation fans at once, so intake and extraction can be balanced deliberately rather than left to guesswork. It plugs directly onto the Systemair EC fan range and draws its power from the connected fan through active cables, so there is no separate power pack to buy or wire in. That keeps a grow tent or grow room climate stable and holds the space under slight negative pressure so odours stay contained.

Key Benefits

• Controls two EC fans from a single unit, with independent adjustment of each
• Independent intake and extraction control for properly balanced airflow
• Maintains negative pressure so smells cannot escape the grow space
• Powered directly from the EC fan - no additional power supply required
• Plugs onto the Systemair EC fan range for straightforward, tool-free setup
• Fine airflow adjustment to hold steady temperature and humidity through veg and flower

Struggling to balance intake against extraction?

When intake and extraction are not balanced, growers get unstable temperatures, humidity swings and odour leaks from the tent. This controller lets you dial in each fan separately so fresh air keeps moving in while the room sits under slight negative pressure, supporting healthy transpiration and nutrient uptake across the whole cycle.

How to Use

• Connect the controller to your EC fans using compatible active cables (required, as the unit is powered by the fan).
• Confirm the fans are from the Systemair EC range.
• Set the intake fan speed on the dial, then adjust the extraction speed to balance airflow and hold negative pressure.
• Monitor grow room temperature and humidity, and fine-tune as conditions change.