The Egyptian community in its path for rapid development is endeavouring to make all necessary andappropriate measures to enhance the efficiency of energy utilization and increase the beneficiation ofthe energy resources. Throughout the Nation, Energy resources are widely used and consumptionrates are in general exceeding the International accepted values. The use and application of new andrenewable energy sources can be harnessed to design, construct and operate a solar building ofmoderate size for desert applications. The paper demonstrates the importance of incorporating anenergy performance directive as a Standard in our region such a goal will aid energy savings in largebuildings and set regulations to energy efficient designs that are based on Standard calculationmethods. The target is to develop standardised tools for the calculation of the energy performance ofbuildings, with defined system boundaries for the different building categories and differentcooling/heating systems. Endeavour to prepare models for expressing requirements on indoor airquality, thermal comfort in winter and when appropriate in summer, visual comfort, etc is targeted witha common procedure for an energy performance certificate.