VENTISOL 12 Inch Varible Shutter Exhaust Fan With Speed Controller, Wall Mounted Alumunim Automatic Vent Fan For Greenhouses,Shop,Home Attic,Garage Ventilation,Black

Range from 70% to 100%Start by turning the knob to High and gradually decrease the power to you desired power level.When finished,turn knob back to OFF.If the speed controller is not connected, the exhaust fan will run at maximum speed.Firstly, the White(or Red) wire of the fan is connected to the Black wire of the speed controller.Secondly,the White wire of the speed controller is connected to switch ,the Black wire of the fan is connected to Neutral and green wire to ground.Installation method and connection diagram are come with clear directions on the user manual. It is very easy to connect with the speed controller and install on the wallt

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