Home / Standards / GB/T 28185 GB/T 28185 Active Heat exchange unit for urban heating 城镇供热用换热机组 Standard Type GBT ICS 91.140.10 CCS P46 Status 现行 Issue Date 2025-01-24 Implementation 2025-08-01 Responsible Dept 住房城乡建设部 Drafting Unit 住房城乡建设部