Details of IAQ


Most people spend more than 90% of their time indoor. According to a recent study of United States - Environmental Protection Agency (US-EPA), our exposure to some air pollutants can be up to 100 times greater than indoor.

A study of the Hong Kong Environmental Protection Department (HKEPD) states that the air quality on about 1/3 of the office buildings was perceived unsatisfactory by the occupants and has violated the World Health Organization (WHO) or relevant overseas standards.

Sick Building Syndrome (SBS) is a common problem in modern air-conditioned buildings. It is probably caused by poor maintenance or improper designed heating, ventilating and air conditioning (HVAC) systems. The pollutants release from office equipment, furniture and supply air duct and operations in the building. Biological contamination, including bacteria, viruses, fungi, algae, yeast and other microorganisms are the common factors in air pollution indoors. Uncontrolled growth of microorganisms in the environment can cause infections, diseases, allergies, spoilage of products, and aesthetic devaluation. It thus reduces productivity and increase health claims and litigation.

"If you go into the dark recesses of a ventilation system, you would be shocked at what you would find."

Dr. Richard Shaughnessy
Director of University of Tulsa
(Indoor Air Research Program)

Government Action To Improve IAQ

The Hong Kong Government will establish a 2-level IAQ objectives to act as the benchmark for evaluating and accessing indoor air quality. These objectives are comparable to the international health-based air quality standards and can encourage building owners to aims at the best indoor air quality.

Common Contaminants Inside Air Duct System
Bacteria Debris Dust Fungi Mold
Common Air Pollutants
Airborne Particles Bacteria Carbon Monoxide Fungi
Nitrogen Dioxide Radon Volatile Organic Compounds Viruses
Ozone Formaldehyde @ @

Common Odors in Indoor Environment
Body Odor Garbage Musty Smell Solvent Smell Tobacco Smoke