... flat roof, pilotis and two 88 m2 apartments per floor. The height of every story is 3 m. The openings are distributed on the northern and southern sides of the building and represent 13% and ... Athens and 6.1% for Thessaloniki. On the contrary, for the cooling period of the 1993-2002 decade, an increase of the energy demands of the building for both cities is observed compared to the ... monthly and yearly values of CDD were increased. The reduction in the yearly values of HDD was in the range of 9.5 to 22% in Athens, and in the range of 5 to 9% in Thessaloniki, depending on the...