2024 No Indoor particle dynamics in a school office: determination of particle concentrations, deposition rates and penetration factors under naturally ventilated conditions https://pubmed.ncbi.nlm.nih.gov/29744699/ Cong, X.C. Asia Epidemiological Ventilation rates Particulate Matter (PM) Dynamic mass balance I/o ratios Air change rate (ACH/AER) Penetration factor Deposition rates Indoor and outdoor PM (0.3-2.5 μm) were measured in a naturally ventilated office in Qingdao, China. Penetration and deposition rates were modeled, showing significant indoor exposure to outdoor-origin PM. Findings inform exposure reduction strategies. 2018