Indoor pollution sources that release
gases or particles into the air are a cause of indoor air
quality problems. Inadequate ventilation can increase indoor pollutant
levels by not bringing in enough outdoor air to dilute emissions
from indoor sources and by not carrying indoor air pollutants
out of the facility. High temperatures and humidity levels can
also create uncomfortable occupancy conditions.
There are many sources
of indoor air pollution. These include combustion heating sources
and second-hand smoke; building materials and furnishings;
cabinetry or furniture which can off-gas formaldehyde; and products
used for cleaning and maintenance. Sometimes outside
sources of contamination are pulled into the facility by outside
air intakes. Improperly adjusted or designed heating and
cooling systems and humidification devices can create problems.
Allergens from many sources can wreak havoc with some individuals
who are sensitized. Mold and myco-toxins produced from molds
can cause serious health effects depending on the mold species
that is present.
