The action entitled “Upgrading buildings and improving energy efficiency in public buildings of the Municipality of Artea- A' FASI” concerns the energy upgrade of three (3) schools of the Municipality of Artaion and specifically a) the Gramenitsa High School with its energy upgrade from category E to category B category, b) of the Primary School of Chalkia which includes the old and new building with their energy upgrade from category H and D in the category B+ and c) of the School.