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  (GB 20665-2015)

Minimum allowable values of energy efficiency and energy efficiency gradesnfor domestic gas instantaneous water heaters and gas fired heating andhot water combi-boilers

代替 GB 20665-2006

发布时间： 2015-05-15

实施时间： 2016-06-01

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