VDI 2077 Blatt 3.3-2014 Energy consumption accounting for the building services - Heat and hot-water supply installations - Cost allocation for solar systems
Verbrauchskostenabrechnung fuer die Technische Gebaeudeausruestung - Waerme- und Warmwasserversorgungsanlagen - Kostenaufteilung bei Solaranlagen
Energy consumption accounting for the building services - Heat and hot-water supply installations - Cost allocation for solar systems 是非强制性国家标准，您可以免费下载前三页