He noted that most IAQ problems cause Sick Building Syndrome (SBS), which is more of a general problem causing people to be sick only when they are in the building; or Building Related Illness (BRI), a specific IAQ problem that can be traced to a specific cause.
"According to industry sources, poor IAQ affects 20 percent to 30 percent of office buildings worldwide," said Glassco. "This has a big impact on absenteeism."