Cooling Fan Manufacturer buy

"Cooling Fan Manufacturer" to buy a lot of people do not know what criteria to choose, in fact there are a lot of reasons, most people do not understand at the time of purchase performance and fan base parameters, they did not know where to start. So teach you some simple shopping tips on the fan, if you master these techniques, we believe there is nothing difficult.
There Certification: When consumers buy "Cooling Fan Manufacturer", should look at the instructions to see if the mandatory certification quality system certification, whether inspection standards certification; and now advocates "green carbon", depends on whether the energy efficiency standards at the national level.
Low noise: "Cooling Fan Manufacturer" major components making noise is the motor, in the selection of fan noise must listen with or without the motor running, to see it in operation whether jitter is stable; good motor let you in quiet environment, only to hear the wind, "whispers", ultra-quiet fan blowing air is good.