Technological / energy standard
German KfW40-standard (comparable to LEED)
Thermal insulation 20 cm (8''), mostly polystyrene foam
Mechanical heat recovery ventilation system with pollen filter
Underfloor heating
Geothermal heat pump
Photovoltaic array on the flat roof
Innovative prefab solid masonry construction
The geothermal heat pump can be operated with the electricity from the photovoltaic array, rendering the house autarkic regarding energy. Geothermal cooling is also possible but wasn't demanded for this project.
