Correlations of air humidity and carbon dioxide concentration in the kindergarten

The education process often begins in kindergarten. Because children spend there between 5 and 10 h a day, the quality of air inside the building is of crucial importance.Kindergartens most often use stack ventilation, which is frequently aided by airing. Exterior wall thermal insulation influences the quality of the natural ventilation system. Insulation reduces air infiltration, and thus disrupts the effectiveness of the natural ventilation system.The research presented in this study was conducted in three kindergartens which varied in terms of their exterior wall insulation. The three considered objects were localized in eastern Europe, in the temperate zone.Relying on the obtained measurement results, analysis of correlation between humidity and CO2 concentration could be conducted. Nearly complete correlation was observed in 61% of the measurements. This fact may constitute a solid basis for the control of natural ventilation.

► In kindergarten CO2 concentration was substantially exceeded by 190%.
► Humidity in kindergarten was below the recommended value.
► Nearly complete correlation was observed in 61% of the measurements.
► Should be changed the control of natural ventilation.