How Do Fan Speed Controls Work?

Solid State Controls

• Fans with solid state controls offer an almost limitless adjustment on fan speed. These electric motors are designed so that the speed is controlled in fine increments from a wall switch. These fans are also noisier than their electronic counterparts.

Capacitor and Transformer Controls

• Fan motors that are controlled by a capacitor or transformer generally have three to five distinct speeds pre-set into the unit. When a different speed is chosen, the next capacitor takes over for that speed selection.

Computerized Controls

• Fans with computerized controls use radio frequency for their adjustment. These fans allow for a fine adjustment in speed without having to hard wire a controller back to the fan.