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
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)