This project has two strands: The first part concerns the design, supply, installation, commissioning of projectors. Monitoring and monitoring of the operation of the National Interconnected Electricity Production and Transmission System (ADMIE) shall be carried out in real time throughout the 24-hour period by the competent ADMIE staff working in the control rooms of the Energy Control Centres (KEECs). The modern, internationally applied technology for this purpose is the use of projective systems that receive information from the Energy Control System (EES), which will replace the outdated technology existing mosaic diagrams. The main systems of the EES are installed in the Energy Control Centres (CEE), the National Energy Control Centre (EKEE) and the Southern Regional Energy Control Centre (NPEC) which are housed in a common building in Kryoneri, Attica and the North Regional Energy Control Centre (VPEC) housed in the building in Ptolemaida Kozani. The implementation of the project will ensure the proper performance of the tasks of the competent staff operating ADMIE in the energy control rooms that are monitored and controlled the operation of the National Interconnected Electricity Production and Transmission System. The project will be implemented by ADMIE as part of its obligations to ensure the supply of electricity to the interconnected system in a safe, efficient, reliable and environmentally friendly manner. The second part of the project concerns the supply, installation, commissioning and maintenance of air-conditioning systems in the buildings of the Energy Control Centres of ADMIE. In particular, it shall include: a.Replacement of existing air conditioners with a new type of more energy efficient units using ecological refrigerating fluids, combined with energy saving techniques. b. Dismantling all old equipment and refrigerant with certified destruction/recycling.