People spend less time outside of industrialized communities. Although it depends on many factors, the proportion of time spend on outdoor activities usually does not exceed 5%. The push towards higher HVAC (heating, ventilation and air conditioning) performances has finally reached buildings that are more insulated than ever before, hence less fresh air can dilute the airborne pollutants in these systems. Spending more than 95% of the time in sealed high-efficiency buildings has led to an increase in Sick Building Syndrome (SBS) cases. According to the statistics of the American Lung Association, the top five pollutants in indoor air include:
- Carbon Monoxide
- Microbial Contaminants (Mold, Dust Mites, etc.)
- Second-Hand Tobacco Smoke
- Volatile Organic Compounds (VOC)
With the intention of limiting occupants’ exposure to these compounds, it is necessary to detect them in order to identify and repair their sources.