GNO’s energy efficiency initiatives result in a 40% energy reduction compared to what a similar building complex would consume without their implementation.

All systems are designed to save energy, such as heating, air conditioning, lighting. Specifically:

  • The planted roofs of the National Library of Greece, the Greek National Opera and the Parking buildings are all covered with Mediterranean plants grown in a special substrate. This substrate and the plants create cooling conditions for the buildings and act as a protective layer in both winter and summer.
  • Hot–water production for air conditioning is effected through natural gas combustion, rather than oil. Heat recovery technology preheats water for use and heating.
  • Air systems feature free cooling, that is, they take advantage of outdoor temperature in mid-seasons to reduce the electricity consumed by air conditioning.
  • All lighting is controlled by an central smart management system, in which optimal timing settings make it possible to keep lights on only when required. A cornerstone of GNO’s architectural design, maximizing the use of natural lighting is a key contributor.
  • The electricity consumed by the GNO is entirely sourced from renewable energy. A portion is generated by the GNO’s Energy Canopy, while the remainder is supplied by the electricity provider. The provider is committed to ensuring the supply of Guarantees of Origin certificates (green certificates) for the electricity.