There are two versions of this fan controller depending on the total amps of the extraction fans you want to plug into them. One with a maximum of 4 amps and the other with a maximum of 7 amps. Make sure you choose the correct model to cater for the hydroponic extract fans you have or are looking to buy. If you have any problems choosing, please contact us in store and we will be happy to help.

It almost couldn’t be easier to use this controller. Simply plug your intake fan into the plug socket on the left and your extract into the right-hand socket and you are pretty much there! Then set the minimum fan speed with the left-hand knob, essentially setting the slowest idle speed you want the fans to run at. Then use the right-hand knob to set the maximum fan speed, particularly useful if you choose to oversize the fans in your grow room.

Once the min and max speeds have been set, you need to set the temperature threshold with the knob in the middle. Once this is set, information is sent from the probe to the unit and it calculates how fast to work. It doesn’t just go to one pre-set speed either, it gradually adjusts the fan speed to gently react to the changing environment, helping to avoid spikes in temperatures.

• If you are using it to control an intake and an outtake fan at the same time, make sure you size the intake fan appropriately so you do not end up with a positive air pressure inside your grow room.
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• Always monitor your temperatures with a separate thermostat, to double check that everything is running according to plan. You will need to adjust your settings over time as your plants grow.
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• If you are having problems with cold night time temperatures and your fan can’t go any slower, consider investing in a good grow room heater to bring the temperature back up to acceptable levels.