The GAS EC1 thermostatic speed controller is the perfect way to control your outtake EC fans.
With a minimum and maximum speed control and powered from the fan, there is no need for a power pack.

Temperature control your fan
Set maximum fan speed to reduce running costs and reduce noise
Set minimum fan speed.
Keep air fresh and CO2 rich
Plugs directly onto Systemair’s EC fan range
Must be used with Active Cables