Q: What is IAQ?
A: Indoor Air Quality (IAQ) is the air quality within and around buildings and structures, especially as it relates to the health
and comfort of building occupants.
Q: What will affect the indoor air quality?
A: Air Pollutants and Thermal comfort will affect the indoor air quality.
Air Pollutants refer to a variety of harmful substances produced by building materials, human activities,
office equipment, outdoor environment, etc.
Thermal comfort means the human body's feelings and preferences for temperature, humidity, and wind speed, etc.
Q: What are the common indoor air pollutants?
A: There are some common indoor air pollutants :
Combustion Gas (Carbon monoxide (CO), Nitrogen dioxide (NO2))
Total Volatile Organic Compounds (TVOC)
Carbon Dioxide (CO2)
Environmental Tobacco Smoke (ETS) (Second-hand Smoking)
Respirable suspended particulates (RSP/ PM10)
Biological Contaminants (Bacteria, Fungi, Mould, Viruses, and Dust Mites, etc.)
Q: What is the impact of poor indoor air quality on us?
A: Poor indoor air quality can cause physical discomfort such as headache, eye irritation, breathing difficulties,
skin allergic reactions, fatigue, and nausea, etc. It will also affect our efficiency at work,
absenteeism, and decreased productivity.
Children, the elderly, and those with existing respiratory or heart disease are more susceptible to the effects of
indoor air pollution.
Q: How can we improve the IAQ in our home or office?
A: To Improve Indoor Air Quality (IAQ) in our home :
Open the windows often to increase ventilation
Clean the ventilation system including air filter and ducting regularly
Quit smoking at home