Particles and Gases
Particles and gases floating in the air can never be entirely eliminated. All particles are harmful to humans. Viruses and bacteria also inhibit the air we breathe in. The major health hazard is the fibres coming from the ventilation systems. Noise insulation materials and thermal Insulation materials, such materials or particles are the main causes of theirritation of the eyes and sneezes. Some smaller particles penetrate deep into the respiratory systems may cause a strong negative impact on health, such as lung cancer.
In general, dust and Particles can enter the building through the ventilation system due to :
- Insufficient filtering of the incoming air (Fresh Air) penetrate into the buildings’ indoor air.
2. Noise insulation materials and Thermal insulation materials (Fibres) spread through the ventilation equipment and ducts into the buildings’ indoor air
3. The impurities collected in the un-cleaned ventilation ducts and poorly maintained air conditioning equipment spread into the buildings’ indoor air
Ventilation, Filtering, and Cleaning
Ventilation is basically a simple process. The indoor air of a building is taken out and replaced with fresh outdoor air. In mechanical ventilation, the removal of the indoor air is done with the help Air Handling Unit (AHU) and The AHU helps to bring outdoor air inside. Ventilation dilutes and removes impurities from the air by filtering.
In a humid and warm country like Malaysia, cooling is always very demanding. The high humidity and warm climate always cause problems to the ventilation system
(AHU and Duct). Condensation always occurs and the moisture condition causes microbial growth. If this condition is left untreated, it always causes diseases and symptoms. Therefore, it is extremely important to keep the ventilation system clean. Accumulation of dust and other substances in the ventilation duct must be removed in order to improve the indoor air quality.
Bad indoor air is not merely a health problem disturbing individuals but also a major expense to the country. Inversely, good indoor air not only ensures people to live healthily, but also increases the productivity of the country.