Maintaining adequate air quality in a room with only one-sided natural ventilation is a challenge, therefore in this study we research the connections between the mechanisms of natural ventilation and diverse window configurations along with their impact on air exchange rate. Investigation of CO2 concentration decay curves makes it relatively easy to determine the airflow rate into a room. The results of measurements at different window configurations show that wind effect is the leading ventilation mechanism at small effective window area. With the window open at the side, we achieve higher airflows than with the tilted window, regardless of the main driving force of ventilation. With the tilted window configuration, the room can only be well ventilated at higher wind speeds.
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