School ventilation in colder periods during a pandemic such as COVID-19

This descriptive study aims to determine, through the testing of different scenarios, if and how it is possible to adequately ventilate (here defined as a concentration of CO2 below 900ppm) non-mechanically ventilated classrooms during colder periods in times of a pandemic such as Covid-19. This is based on the principles of 'switched opening' and 'thermal draft'. In the case of switched openings, ventilation openings such as windows, doors or grilles are opened in opposite facade surfaces. Wind and temperature differences create air flows that provide for air renewal (openings in overpressure and underpressure zones). Thermal tension involves height differences in ventilation openings, e.g. a window in a classroom and a window in the corridor on the floor above. Height differences in ventilation openings can also be created in one room. The air then moves from the bottom to the top, resulting in air exchange. In addition, we also want to check whether in classrooms in which ventilation is only possible from one side, sufficiently low CO2 concentrations can also be achieved.  

Publication year:2021

Accessibility:Open