GB 20665-2006
China national
standard english version:
GB
中华人民共和国国家标准
NATIONAL
STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB 20665-2006
Minimum allowable values of energy efficiency and energy efficiency grades for domestic gas instantaneous water heater and gas fired heating and hot water combi-boilers 家用燃气快速热水器和燃气采暖热水炉能效限定值及能效等级
Issued Date:2006-12-12
Implemented Date:2007-07-01
Issued by:
The Standardization Administration of the People's Republic of China