INDOOR AIR QUALITY PROBLEMS


The following four elements are involved in the development of Indoor Air Quality problems:

Sources:
 there is a source of contamination or discomfort indoors, outdoors, or within the mechanical systems of the building.

HVAC:
 the HVAC system is not able to control existing air contaminants and ensure thermal comfort (temperature and humidity conditions that are comfortable for most occupants).

Pathways:
 one or more pollutant pathways connect the pollutant source to the occupants and a driving force exists to move pollutants along the pathway(s).

Occupants:
 building occupants are prese