ABSTRACT
The current study analyzes educational buildings aiming to determine the long and short-term effects of the COVID-19 pandemic situation regarding the usage patterns and indoor environmental quality standards. Through monitoring campaigns in various classrooms, data has been gathered on temperature and indoor air quality which has made it possible to obtain a picture of the current situation in rooms with forced ventilation systems as well as in rooms where only natural ventilation is available. Results show that the CO2 concentration levels remain controlled regardless of the number of students in spaces equipped with mechanical ventilation;however, in classrooms where only natural ventilation is available, these values vary depending on the occupancy and, when attempting to maintain the recommended levels, indoor thermal conditions are greatly affected by the external weather. The factors with the greatest impact on comfort are airspeed and outside temperature, which in several cases have resulted in very low indoor temperatures that do not comply with the legally required limits. © 2022 by the authors. Licensee AEIPRO, Spain. This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (https://creativecommons.org/licenses/bync-nd/4.0/)