It is critically important to have a flow of good indoor air quality throughout a buildingto ensure a supply of fresh air and minimize the risk of indoor air pollution from sources such as particulates, carbon dioxide, carbon monoxide, ozone, formaldehyde, total volatile organic carbon, bacteria and molds. Indoor air pollution can have a serious impact on employees health, both immediately and in the long-term, and statistics from the World Health Organization show that 4.3 millions people die annually because of substandard indoor air quality.