2024 No Bangkok school indoor air quality: monitoring and intervention by positive pressure fresh air system https://link.springer.com/article/10.1007/s11356-024-32843-8 Ongwandee, Maneerat Asia Epidemiological Students Middle/Jr High (6-8) High School (9-12) Carbon Dioxide (CO2) Carbon Monoxide (CO) Particulate Matter (PM) Volatile Organic Compounds (VOCs) Ozone (O3) Temperature Humidity Respiratory symptoms Nausea Headaches Vision School indoor air quality Positive pressure fresh air system PM2.5 Indoor environmental quality Ventilation A Bangkok study measured pollutants in 10 schools. PM sources varied by ventilation type; air-conditioned rooms had low air change and high fungi. A fresh air system reduced PM and sick building symptoms, improving student satisfaction with IAQ. 2024