Analysis of the Results of Monitoring Microclimate Parameters and Carbon Dioxide Concentration in a School Classroom

Abstract

This study analyzes the results of monitoring microclimate parameters and indoor air quality (temperature, relative humidity, and CO₂ concentration) in a classroom over a period of at least 10 days in the winter and spring of 2025. The study was conducted to assess the compliance of the classroom microclimate parameters with current sanitary and hygienic standards (SanPiN 1.2.3685, SP 60.13330, GOST 30494). Particular attention is paid to the dynamics of changes in carbon dioxide (CO₂) concentration in the classroom, as a key indicator of air quality and ventilation system efficiency. The recorded indicators affect people's performance and well-being, which determines the relevance of the identified problems and proposed solutions. The study results show that during the cold season, the temperature and relative humidity of the indoor air in the classroom are within the permissible range. At the same time, the concentration of carbon dioxide (CO₂) in the classroom systematically exceeds the permissible level (1400 cm³/m³), reaching peak values of approximately 3000 cm³/m³ during certain periods. Specific organizational and technical measures aimed at reducing CO₂ concentrations in the classroom to permissible levels are proposed.