Ecological analysis of natural ventilated facade system and its performance in Tehran's climate

Facade as the most outer part of building has very important role in building’s energy exchange and its thermal comfort. Using of ventilated facade have been increased due to its positive points, including aesthetics, energy saving and sustainable approach so it is important to study its compatible in different climate conditions. In the present study to evaluate the effectiveness of this technology in Iran’s climate compared to conventional systems as well as the effect of other factors in improving its performance, five models of a building with different situations have been modeled in Design Builder software and samples were examined in terms of the amount of energy needed to achieve comfort conditions. The result was that buildings with ventilation facades use 40% less energy than the building with conventional facade system. Its effectiveness in improving the cooling performance is better than its performance in the heat and its performance in the southern facade and areas that are exposed to direct sunlight looks much better. Factors such as the effect of height and number of floors also have an impact on system performance.