Tips on Application of Natural Ventilation in Prevalent Buildings in Iran

In the present research, methods of using natural ventilation in the architecture of the buildings have been studied. Architectural elements such as: the atrium, the ceiling light aperture, the courtyard, the staircase, dome roof, duct of the instalations, and vertical channels of the building such as channel of the elevator are widely used in Iranian buildings. In the present research, the feasibility of using these elements for natural ventilation has been studied taking into account the relevant standards.Natural ventilations based on the ceiling light aperture, vertical paths such as atrium and duct, combination of staircase and duct, and pass through ventilation have been studied. For the ventilation based on vertical paths such as the installation duct or the atrium, the ratio of the path area to the opening to it should be 0.78 times of the hydraulic diameter of the path. The area of the opening of the room to outdoor should 1.5 times of the opening of the room to the path.For ventilation using the light ceiling aperture the area of the opening to outdoor is independent of buiding area and should be 1 m2. In ventilation using duct and staircase the should be an opening on the doom roof with area equal to the area of the duct.The ban on the use of the elevator canal for ventilation, the limitation of the use the staircase for exhaust air according to the relevant regulations, and the suggestion have given in the present study.