Indoor ventilation is essential to ensure sufficient air quality. Air quality is closely linked to the health, productivity and general well-being of the occupants. Many buildings do not have a mechanical ventilation system installed and are therefore ventilated naturally. Natural ventilation can be implemented in a number of possible ways, the most common example being single-sided ventilation, which has its advantages and disadvantages. The problem with single-sided ventilation is to provide a ventilation effect in the parts of the room furthest away from the ventilation opening. Using the DesignBuilder software tool, a computer simulation of single-sided ventilation of a classroom was carried out to determine the effectiveness of the ventilation. For the simulation, we chose lecture room III/3A on the third floor of the Faculty of Mechanical Engineering of the University of Ljubljana and used its data. Based on the simulation, we found that the efficiency of single-sided ventilation is closely related to the size of the ventilation openings and that the required conditions can be achieved in the classroom.
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