title: Effect of ventilation and filtration on submicrometer particles in an indoor environment.
abstract: The effect of filtration and ventilation on reduction of submicrometer particle concentration indoors was investigated in an office building. The air-handling system consisting of dry media filters and an air-conditioning unit, reduced particle concentration levels by 34%. The characteristics of indoor airborne particles were dominated by, and followed the pattern of, outdoor air, with vehicle combustion aerosols as the main pollutant. The ratio indoor/outdoor particle concentration varied between 14 and 26% for different sub-zones. The presence of significant source of particles indoors was not observed. A simple mathematical model predicting evolution of particles indoors is presented. The model, based on a particle number balance equation, was validated with experimental data and showed very good agreement between predicted and measured parameters.
authors.affiliation: Queensland University of Technology, Centre for Medical and Health Physics, Brisbane, Australia. m.jamriska@qut.edu.au
authors.forename: M
authors.initials: M
authors.lastname: Jamriska
authors.forename: L
authors.initials: L
authors.lastname: Morawska
authors.forename: B A
authors.initials: BA
authors.lastname: Clark
mesh_terms: D000336:Aerosols; D016902:Air Pollution, Indoor / Q000032:analysis / Q000517:prevention & control*; D004784:Environmental Monitoring; D005374:Filtration; D008962:Models, Theoretical; D010316:Particle Size; D014691:Ventilation
chemical_list: D000336:Aerosols