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Effect of natural ventilation on indoor air quality parameters in different microenvironments

2024    Gunes, G.; Undar, O. T.

In this study, the effect of natural ventilation on indoor air quality was investigated in different microenvironments and possible sources of pollutants were estimated. Particulate matter with an aerodynamic diameter less than 2.5 mu m and less than 10 mu m, total volatile organic compounds, formaldehyde, temperature and humidity values were measured. Carbon dioxide was measured with PCE CMM5, other parameters with PCE- RCM 11. It was determined that the winter season concentrations of both particulate and gas phase compounds were higher than other seasons. The results indicated that the increase in human numbers and activity can cause the resuspension of dust accumulated on indoor surfaces. It was determined that frying/cooking processes and disinfectant use may cause an instant increase in total volatile organic compounds and formaldehyde concentrations. Additionally, total volatile organic compounds and formaldehyde concentrations may be affected printers, personal computers, potted plants, wooden cabinets, tables, wooden flooring, personal care products (perfume, cream, hand sanitizer, etc.) and citrus fruits. Indoor particle matter concentration increased during natural ventilation, especially in windy weather. The average values determined for quality parameters (except carbon dioxide) before natural ventilation did not show any significant difference according to the sampling points (p > 0.05). Nevertheless, the difference between the concentrations of total volatile organic compounds total volatile organic compounds, formaldehyde and carbon dioxide compounds before and during natural ventilation was statistically significant (p < 0.05).