SMSCOM Fan Speed Controller

This fan speed controller unit from SMSCOM has a built in thermostat. These fan speed controllers are great for grow tents to control an extraction kit and can be simply plugged into your existing fan as there is no wiring with these units.

Simply plug your fan into the controller and set the temperature dial as high as it goes, then turn your idle speed dial to the setting you require, this will allow the fan to idle round when the temperature is reached.

Next set the temperature dial to the temperature setting you require for your growroom, as the room heats up and the temperature is reached it will automatically turn the fan on to full speed and then as it cools the room and drops below the set temperature, it will allow the fan to then idle at a slower speed to provide a constant movement of air in your growroom.