Modelling indoor air quality in schools using grey box models

Abstract: Current indoor air quality strategies are based on the measurement and control of carbon dioxide (CO2) indoor concentration. Most educational buildings rely only on natural ventilation, making indoor air quality highly dependent on weather conditions. Therefore, to ensure the safety and well-being of students and teachers, it is necessary to determine the factors influencing CO2 concentration in naturally ventilated spaces. The aim of this paper is to estimate the students’ CO2 emission rates in naturally ventilated classrooms using grey box models.