Start fans, many people are accustomed to start slowly began to stall, that such power can not only protect the parts and prolong life. In fact, this is precisely counter-productive. Because fans of the starting current than normal operation when the big 4 to 8 times, with fast file starts, 220 volts all added to the primary coil on the motor, when voltage is enough to start fast, less fan motor heat. On the contrary, slow file to start, the voltage step-down through the speed laps later, added to the two tranches of low voltage electrical coils, electrical coils to extend the time by large currents, coil heat increases, thus affecting the fan life, or even burn out motors . So, start fans, it is best first to use fast file until the normal speed, then adjust their stalls.