NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB 20665-2015
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:2015-05-15
Implemented Date:2016-06-01
Issued by:
The Standardization Administration of the People's Republic of China
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