The first and most important step is choosing an energy-efficient dwelling. When designing the project and subsequently implementing it, the question is always how to achieve rational energy efficiency that is proportionate to the costs.
A system of energy efficiency cards for structures has been or is being created in all European countries, with energy labelling that indicates the level of energy efficiency. We are all familiar with the energy labelling on electrical home appliances, such as refrigerators, washing machines and dishwashers. Energy labelling provides a clear and general picture of a building’s energy efficiency expressed in absolute numbers, based on which it is easy to calculate the annual energy savings. This labelling also provides a clear graphic view of how a particular solution compares to the required minimum values in the country.
Several factors need to be considered when assessing the energy efficiency of a building. These include the means for providing heat and hot water. Each country has regulations for assessing the energy efficiency of buildings. This are based not only on the different climatic conditions, but also on the economic and technical standards that apply in the area.