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Indoor air pollution in working places is widely recognized as one of the most serious potential environment risks to human health (WHO, Indoor air quality research: Report on a WHO meeting Stockholm 1984, Euro-reports & Studies 103, WHO, Copenhagen, Denmark 1986, p. 1–64). A stainless steel flow-through environmental chamber was used to characterize the emissions rate of pollutants from office equipment. Different types of office equipment (including fax machines, laser printers, ink-jet printers, scanners, and photocopying machines) were investigated. The concentration of volatile organic compounds (VOCs), total VOC (TVOC), ozone, respirable particles (PM₁₀) and temperature were measured. Characterization the species of VOCs was carried out by gas chromatography—mass selective detector (GC-MSD). The highest emission rates of VOCs compounds were toluene, ethylbenzene, m,p-xylene, and …