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Indoor environment is considered to be a basic requirement for human health and well-being. Concentrations of indoor air pollutants are typically 2-5 times higher, and occasionally 100 times higher than outdoors. The condition and performance of the ventilation have a significant impact on indoor air quality. People are ordinarily exposed to high concentrations of pollutants in indoor environments. The consequences of low ventilation rates include elevated levels of carbon dioxide and other air contaminants indoor...