Energy efficiency at buildings

Energy efficiency at buildings

Buildings and transportation are the most energy-consuming sectors in Greece. Buildings in Greece account for approximately 36% of the total energy consumption, while, during the years 2000-2005, relevant energy consumption increased by approximately 24%, one of the highest increases in Europe.

One of the main reasons why Greek buildings consume so much energy is that they are old and have no built-in state-of-the art technology, due to the lack of relevant legislation over the last 30 years.

Most of these buildings were built before 1990 and have problems relating to:

  • partial or total lack of heat insulation;
  • outdated technology windows/doors (frames/single glazing);
  • lack of sun protection on southern and western sides;
  • inadequate use of Greece’s high solar potential;
  • inadequate maintenance of heating / air conditioning systems, resulting in poor performance.

Another important factor affecting building’s energy performance is tenant behavior. Users-tenants, who lack information about the rational use and management of energy, often tend to waste energy, e.g. by installing individual air conditioning systems without a relevant study, using low efficiency appliances, not performing maintenance of heating systems, etc.