Home / Standards / GB/T 23889-2009 GB/T 23889-2009 Active Specifications of air source heat pump assisted domestic solar water heating systems 家用空气源热泵辅助型太阳能热水系统技术条件 Standard Type GBT ICS 27.160 CCS F12 Status 现行 Issue Date 2009-06-01 Implementation 2010-01-01 Responsible Dept 国家标准委 Drafting Unit 国家标准委