本标准定义了由额定功率为125 W（1/6 hp）及以上的电机驱动的所有风扇类型的分类。风扇的范围从专门制造的单风扇到批量生产的系列风扇。本标准适用于风扇，而非风扇系统。本标准不包括循环风机的分类。立法或监管机构也可以使用本标准来定义特定应用中所用风扇的能效要求。

This standard defines the classification for all fan types designed to be driven by motors of nominal rating 125 W (1/6 hp) and above. The fans can range from the purpose built single fan to series produced fans manufactured in large quantities. This standard applies to the fan and not the fan system. This standard excludes classification for circulating fans.This standard can be also be used by legislative or regulatory bodies for defining the energy efficiency requirements of fans used in specific applications.