Indoor air quality (IAQ)

Indoor air quality (IAQ) is a term which refers to the air quality within and around buildings
and structures, especially as it relates to the health and comfort of their occupants.
IAQ can be affected by gases (including carbon monoxide, radon, volatile organic compounds),
particulates, microbial contaminants (mold, bacteria), or any mass or energy stressor that can
induce adverse health conditions. Source control, filtration and the use of ventilation to dilute
contaminants are the primary methods for improving indoor air quality in most buildings.
Residential units can further improve indoor air quality by routine cleaning of carpets and
area rugs. The U.S.EPA （Environmental Protection Agency）has guidelines for the frequency
of cleaning based on traffic, number of household members, pets, children and smokers.
Carpets and rugs act like an air filter and thus must be cleaned,periodically.