2024 Yes Effects of Ventilation Improvement on Measured and Perceived Indoor Air Quality in a School Building with a Hybrid Ventilation System https://www.mdpi.com/1660-4601/15/7/1414 Vornanen-Winqvist, Camilla Europe Experimental Teachers Students Ventilation rates Carbon Dioxide (CO2) Volatile Organic Compounds (VOCs) Ventilation Hybrid ventilation Indoor air quality Mycobiota Indoor air questionnaire School buildings Trichoderma citrinoviride A case study in a new school found that ventilation errors led to poor IAQ and microbial contamination. After fixing the system, CO₂, VOCs, and Trichoderma citrinoviride levels declined, showing ventilation improvements can reduce indoor exposures. 2018