When consumers buy "220V Cooling Fan", to look at the instructions to see if the mandatory certification quality system certification, whether there is inspection standards certification; and now promote "green carbon", depends on whether the national level energy efficiency standards. Odor is "220V Cooling Fan" odor varnish coating on the copper produced at the time of the operation, in the purchase of fans have to smell it, to see this paint is environmentally friendly, whether through quality testing, let you out in the fresh enjoy the cool air, the wind. Safety requirements for electric fans, the national standards set forth in a very detailed, consumers can be a simple test. Qualified "220V Cooling Fan", general adult fingers can not touch the fan grille and front, families with young children should choose dense fan grille.