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See Chinese contents: GB 12021.9-2021 GB 12021.9-2021: Minimum allowable values of energy efficiency and energy efficiency grades for electric fans
This document specifies the energy efficiency grades, technical requirements, test methods and energy efficiency calculation methods for electric fans. This document applies to AC or DC motor driven table fans, louver fans, wall fans, floor fans, pedestal fans and ceiling fans, of which the single-phase rated voltage does not exceed 250 V and other rated voltages do not exceed 480 V.
