【国家标准】 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

This standard specifies the minimum allowable values of energy efficiency,evaluating values of energy conservation,energy efficiency grades,test methods and inspection rules for domestic gas instantaneous water heaters (including condensing domestic gas instantaneous water heaters,hereafter referred to as water heaters) and gas fired heating and hot water combi-boilers (including gas fired heating and hot water condensing combi-boilers,hereafter referred to as combi-boilers).
This standard is applicable to the water heaters and combi-boilers which use gas as the fuel only and have a nominal heat input of 70 kW or less.
This standard is not applicable to gas storage water heaters.
The gas specified in this standard shall comply with GB/T 13611.