Monitoring Indoor Environmental Quality in a University Classroom

Abstract

Indoor environmental quality in educational facilities is a critical factor influencing student well-being and learning efficiency. This study aimed to assess classroom environmental quality by measuring key parameters, including temperature, relative humidity, and carbon dioxide (CO₂) concentration, at two different heights (1.2 m and 2.65 m). The results demonstrated that air quality is significantly affected by the number of students, insufficient air circulation, and inadequate ventilation. CO₂ measurements showed that the recommended threshold of 1000 ppm was often exceeded at the beginning of lessons, with a maximum recorded concentration of 3540 ppm. No statistically significant differences were observed between the two measurement heights. Relative humidity ranged from 34 to 51%, in line with recommended classroom values, whereas temperature occasionally exceeded recommended limits. Based on these findings, measures to improve indoor environmental quality are proposed, with the implementation of efficient ventilation systems identified as a key intervention.