To "220V Cooling Fan" safety requirements, national standards set forth very detailed, consumers can be a simple test. Eligible fans, general adult's finger can not be touched by guards and the leading edge of the blade, families with children should choose dense fan grille. Odor is the smell of varnish coating on the copper electric fan in operation resulting in the purchase of fans have to smell, see this paint is environmentally friendly, whether through quality testing, let you enjoy the fresh air in cool wind.