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See Chinese contents: GB 32049-2015 GB 32049-2015: Minimum allowable values of energy efficiency and energy efficiency grades for household and similar purposes A.C. electric ventilating fans
This Standard specifies the minimum allowable values, energy efficiency grades, evaluating values of energy conservation, test methods, inspection rules and energy efficiency grade marking for household and similar purposes A.C. electric ventilating fans. This Standard is applicable to AC motor-driven ventilating fans, of which the single-phase rated voltage is not more than 250 V, the rated input power not more than 500 W, and the impeller diameter is not more than 500 mm.
