Energy Rating for Residential Buildings in Amman

d heating energy requirement has been calculated according to Jordanian codes, using Hourly Analysis Program (HAP) and degree-days method (DD). The energy rating which provides the necessary information about the energy performance of the residential buildings has been assessed. The assessment is based on the thermal envelope. The annual energy loads are calculated for different cases according to different parameters such as glass layers for windows, and direction of the apartment. Two main cases are considered in constructing the energy rating scale; the cases are two apartments (one directed to the right while the other is directed to the left) located in Marka, Amman, Jordan. The two apartments have the same area of 110 m2 and in the same building's floor. The different orientations have been considered for the apartments of 90, 180 and 270 degree clock wise rotations. Then, the heating and cooling loads are calculated for all orientations using single glass and double glass. The annual cooling and heating energy without rotation using degree-days method (DD): for case one are 123.8 kWh/m² (for single glass) and 112.8 kWh/m² (for double glass), and for case 2 are 125.9 kWh/m² (for single glass) and 114.6 kWh/m² (for double glass) at Tb=18.3 Ԩ for heating and Tb =24 Ԩ for cooling. These results are in good agreement with the HAP results. Finally, an energy rating scale was suggested for residential buildings in Amman.