|（Quote from IAQ Information Centre
Importance of IAQ
‧People breathing every minute every second, the cleanliness of the air
we breath in is very important to our health
‧We spend 70% of our time indoor, i.e. at school, home, in offices,
shopping arcade, etc.
‧Children, elderly and those with existing respiratory or heart disease
are more susceptible to the effects of indoor air pollution
Impact to Human
—Short-term and treatable Immediate effects
after exposure to high concentrations of indoor air pollutants
—Symptoms of some diseases
may show up only years after exposure has occurred or after long
or repeated periods of exposure,
Sick Building Syndrome
‧is used to describe situations in which building occupants experience
acute health and comfort effects
‧that appear to be linked to time spent in a building, but no specific
illness or cause can be identified.
‧building occupants complain of symptoms associated with acute
e.g., headache, eye, nose, or throat irritation, dry cough, dry or
dizziness and nausea, difficulty in concentrating, fatigue, and
sensitivity to odors.
‧The cause of the symptoms is not known and most of the complainants
report relief soon after leaving the building.
|Volatile Organic Compounds
‧from household or consumer products such as cosmetics,
‧after dry cleaning, clothing might have residues of VOCs, such
as benzene, toluene and xylene.
‧these products are used for wall painting or paint stripping.
‧This may cause discomfort, and even worse, may cause cancer.
Formaldehyde emissions in the indoor
mainly come from furniture made of wood products
‧from pressed wood products with urea-formaldehyde as adhesive
or coating materials.
‧Other sources include gas cooking, incense burning, carpeting,
‧A high level of formaldehyde will irritate your eyes, nose and