...
so as a direct
result of dirty duct systems. In fact, as many as half of
all illnesses are either caused or aggravated by indoor air
pollution. According to the US EPA, indoor air can be up to
70 times more polluted than outdoor air.
What causes SBS
problems? Almost 80% of SBS problems are caused by either
inadequate ventilation, a source of pollution or both.
Inadequate ventilation is usually pretty straightforward to
fix. A pollution source can be external to the building or
within the building itself (including the ventilation system
duct work). Building operations personnel have little or no
control over external pollution sources and usually must
resort to special filters or other solutions. Internal
pollution is a little easier to deal with, especially a
contaminated duct system.
Building
operations personnel have two choices when a contaminated
duct system is discovered: