2024 Yes The impact of particle filtration on indoor air quality in a classroom near a highway https://onlinelibrary.wiley.com/doi/10.1111/ina.12308 van de Zee, S.C. Europe Observational Middle/Jr High (6-8) High School (9-12) Ventilation rates Filtration Particulate Matter (PM) Ventilation Filtration Particulate matter (PM) Black carbon Highway School A pilot study in a Dutch high school found that installing an F8 (MERV14) filter in a mechanical ventilation system reduced classroom black carbon by 36%, PM10 by 34%, and PM2.5 by 30%, showing filtration can reduce traffic-related exposure in schools. 2016