Air quality is the term used to describe the levels of harmful particles or radicles in indoor or outdoor air. Poor air quality may be attributed to microbial contaminants such as the spore forming bacteria or volatile organic compounds (VOC). The identification of such sources of pollution is a critical step in improving indoor air quality. Air quality is also a function of the number of air changes in an enclosed environment. This is typified by poor ventilation of indoor areas. This can be associated with microbial contamination by molds producing mycotoxins, casual agents of Sick Building Syndrome, attributed to inadequate ventilation and chemical contaminants from indoor or outdoor sources.
Steps to improving and remediating air quality is outlined by the American Society of Heating Refrigerating and Air Conditioning Engineers (ASHRAE), which advises to provide a minimum of 20 cfm of outdoor air per person in an office space to ensure a sufficient level of purity in the indoor air.