Ventilation is a device that provides a naturalor mechanical flow of fresh air to a closed area, expels heated aircontaminated with harmful gases, odors, and dust in a volume equivalent to theincoming fresh air. This system is installed in school laboratories, hotelkitchens and common areas to prevent odors and fumes from escaping thebuilding.The spread of toxic smoke in buildings oftencauses people to die. In this regard, precisely because smoke can harm humanhealth, in the design of buildings and structures, the goal of engineers is toconduct a careful analysis of ventilation lines and systems and to take intoaccount the removal of combustion products to ensure the safety of human healthand property.