Home / Standards / GB 26969-2011 GB 26969-2011 Active Minimum allowable values of energy efficiency and energy efficiency grades for domestic solar water heating systems 家用太阳能热水系统能效限定值及能效等级 Standard Type GB ICS 27.160 CCS F12 Status 现行 Issue Date 2011-07-19 Implementation 2012-08-01 Responsible Dept 国家标准委 Drafting Unit N/A