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Basic circuit diagrams

Monovalent / monoenergetic operation. Geothermal heat pump, with built-in hot water tank, buffer storage, one direct heating filament circuit

 Monovalent / monoenergetic operation. Geothermal heat pump, with external hot water tank, buffer storage, one direct heating filament circuit

 Bivalent operation. Geothermal heat pump, with external hot water tank, buffer storage, one direct heating filament circuit

 Monovalent operation. Geothermal heat pump, with passive cooling, external hot water tank, buffer storage, one direct and one mixed filament circuit

 Bivalent operation. Geothermal heat pump and condensation gas furnace, with two external hot water tanks, buffer storage, and one direct heating filament circuit

 Monovalent operation. Geothermal heat pump, with external hot water tank, hot water heating with flat plate solar collector, buffer storage, one direct and one mixed filament circuit

 Monovalent operation. Air-source heat pump, with active heating, with external hot water tank, hot water heating with flat plate solar collector, surface filament circuits

 Bivalent operation. Air-source heat pump and condensation gas furnace, with active heating, with external hot water tank, hot water heating with flat plate solar collector, two mixed filament circuits

 Bivalent operation. Air-source heat pump and condensation gas furnace, with active heating, with external hot water tank, warm water heating with vacuum tube solar collector and supplement to heating, one direct and two mixed filament circuits, system storage

 Bivalent operation. Geothermal heat pump and condensation gas furnace, with passive heating, with external hot water tank, warm water heating with vacuum tube solar collector and supplement to heating, one direct and two mixed filament circuits, system storage