According to the “BP Statistical Review of World Energy 2017”, Saudi Arabia was the world's 10th largest consumer of total primary energy in 2016. It can provide itself completely with self- produced energy and the main source of energy production are the Fossil Fuels. The total consumption of electric energy per year is an average of 8,889 kWh per capita, and the energy needs are going to grow faster in future because the fast population growth, the high economic growth and the low energy prices. The buildings residential, governmental and commercial in KSA consume 80% of the electricity generated in the country, while AC represents more than 70% of this consumption, followed by lighting and appliances.