To predict the aerosol number concentration decay in modern classrooms, this study derived
an analytical model that addresses various indoor factors, viz., the filtration efficiency of air
ventilation systems, effects of indoor air cleaners, particle deposition on walls, and particle
emission from occupants. We also conducted experimental measurements to determine the
wall-loss coefficient and the occupants' particle generation rate, and the modeling results
agreed with the experimental data reasonably well. Additionally, we investigated the …