Home / Standards / GB 26969-2025 GB 26969-2025 Upcoming 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 27.010 CCS F01 Status 即将实施 Issue Date 2025-08-01 Implementation 2026-08-01 Responsible Dept 国家标准委 Drafting Unit N/A