The building sector is one of the key consumers of energy in Europe today with an overall rising trend the past 20 years. In 2009, EU-27 households were responsible for 68% of the total final energy use in buildings mainly consumed for heating (70%).
In this context, it is important to note that about 38% of all residential buildings in Europe were built before 1960 and 45% between 1960 and 19901.
In order to achieve the EU 20-20-20 goals, it is essential to renovate and retrofit these buildings according to EU’s standards for energy efficiency in buildings. Most of these buildings are currently equipped with old and inefficient heating systems based on fossil fuels that need to be replaced by modern heating systems that are highly efficient and capable of utilizing renewable energy sources.