Instalment of solar heating systems in residential buildings Instalment of furnaces on wood biomass for central heating Instalment of heating pumps for central heating in residential buildings Connecting older one or two family residential buildings onto district heating Instalment of heat insulation for facades on older one or two family residential buildings Instalment of wooden energy efficient windows in older residential buildings Instalment of heat insulation for roofs and ceilings in older one or two family residential buildings Instalment of ventilation with heat recuperation in residential buildings Instalment of gas condensation boilers for central heating in older residential buildings Building or purchase of passive one or two family residential buildings Complete renovation of older one or two family residential buildings Purchase of living units in new or renovated three or more unit residential buildings