NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB 21454-2021
Minimum allowable values of the energy efficiency and energy efficiency grades for multi-connected air-condition (heat pump) units 多联式空调（热泵）机组能效限定值及能效等级
Issued Date:2021/10/11
Implemented Date:2022/11/1
Issued by:
The Standardization Administration of the People's Republic of China
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