One-third of the total primary energy consumption is spent for space and water heating. Nevertheless, is the energy demand of buildings mostly unknown to their users. With entry into force of the new energy saving regulations, energy performance certificates are compulsory for existing residential buildings.
They gives information about:
- Heating and hot water costs
- Condition of the building envelope (insulation)
- Suggestions for improving the energy balance
Thereby, potential tenants or buyers can easily nationwide compare the energy demand or consumption of various buildings in the future.