Effective Factors on Indoor Air Quality in an Office Building in Tehran

Due to the accumulation of pollutants in indoor environment، complaints about the indoor air quality has been increased in recent years. This study conducted in order to investigate the effective factors on indoor air quality in an office building in Tehran، Iran. In this cross-sectional descriptive study، environmental factors effective on indoor air quality was measured using direct reading instruments. Symptoms of sick building syndrome were investigated using Indoor Air Quality questionnaire. Nine percent of employees complained about their poor work conditions. The most complaints were related to air heaviness، fatigue and headache. Parameters measured included carbon dioxide، carbon monoxide، particulate matter، volatile organic compounds، ozone، formaldehyde، temperature، humidity، and noise were lower than the recommended limits. While most of air quality indices were below the reference values، only some of employees complained about quality of indoor air in the studied building. It seems that some other factors such as job stress and job satisfaction influence the employees’ perception of indoor air quality which should be considered.