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

NORMA vydána dne 15.5.2015

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The information about the standard:

Designation standards: GB 20665-2015
Publication date standards: 15.5.2015
Country: Chinese technical standard
Kategorie: Technické normy GB