Home / Standards / GB/T 45650-2025 GB/T 45650-2025 Active Air source heat pump packages with carbon dioxide as refrigerants 二氧化碳空气源热泵机组 Standard Type GBT ICS 27.200 CCS J73 Status 现行 Issue Date 2025-04-25 Implementation 2025-11-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A