GB 19761-2009 Translated English of Chinese Standard. GB19761-2009: Minimum allowable values of energy efficiency and energy efficiency grades for fan

This Standard specifies the energy efficiency grades, minimum allowable values of energy efficiency, evaluating values of energy conservation and test methods for fan.This Standard applies to general-purpose centrifugal fan and axial flow fan; centrifugal induced-draft fan for industrial steam boilers; centrifugal pressure fan and induceddraft fan for power station boiler; axial flow fan for power station; and centrifugal fan for air-conditioning.