In Iran, a large amount of fossil fuel is burned every day to produce different kinds of energy. This issue causes severe environmental pollution such as air pollution, thermal pollution and etc in this area. For this reason, it is necessary to use renewable energy and inactive systems. Because by using this kind of energy and systems, low-cost solutions can be provided to improve the climatic conditions of this geographical area which is in a hot and humid climate. In order that the use of this type of systems has a very long history in Iranian ancient architecture. These systems had usually emerged and developed in the form of various vernacular elements. But nowadays, they are usually ignored by contemporary architects and urban designers. In this research, as a first step, Senasir has been briefly introduced. Then, as a second step, the behavior of certain inspiration modules derived from Senashir had been analyzed by Fluent as an appropriate software (This software is usually used in the field of Computational Fluid Dynamics (CFD)). This research intends to analyze and investigate the behavior of modules -designed based on the climatic function of Senasir as one of the vernacular and architectural elements of historical part of Bushehr- to achieve thermal comfort in spaces which have large scale, especially in hot and humid climates. Because currently we have a lot of problems achieving thermal comfort in this kind of space by using mechanical and electronic systems. Based on the analysis, these modules narrow the air flow along the duct. This issue will reduce the air pressure and increase its speed at the end of the channel. For the last step, a wall which was made by these modules was analyzed and the result showed that the modules have positive effect on natural ventilation and increasing the speed of air flow in the spaces.