Home / Standards / GB 19577 GB 19577 Active Minimum allowable values of energy efficiency and energy efficiency grades for heat pumps and chillers 热泵和冷水机组能效限定值及能效等级 Standard Type GB ICS 27.01 CCS F01 Status 现行 Issue Date 2025-07-04 Implementation 2025-02-01 Responsible Dept N/A Drafting Unit N/A