• Indoor air can be 10 times more polluted than outdoor air.
There is a common myth that air pollution occurs only outdoors or in industrial environment, but the truth is air inside conditioned space can be substantially more polluted than outdoor air.Indoor Air Quality (IAQ) refers to the nature of the conditioned (Heat/Cool) air that circulates throughout space/area where we work and live i.e. the air we breathe during most of our lives.
Identify the Indoor Air pollutants
Indoor Air Pollutants
VOCs; Formaldehyde; Radon asbestos; Virus & Bacteria; Mould, Mildew & Fungus.
Source: Printers, photocopiers, fax machines; carpets, cleaning products; paints, polish, solvents; moisture and people themselves.
Effect on Health
SBS – Sick Building Syndrome (Short term exposure – few hours a day): SBS is an outcome of poor IAQ, and describes the condition of a building in which more than 20% of the occupants suffer from adverse health effects, but with no clinically diagnosable disease.
Symptoms are in form of cluster of complex irritating symptoms including headache; nausea; fatigue, dizziness, lethargy; respiratory problems; coughing; wheezing; eye, nose & throat irritation; dry skin, skin rashes; and sensory discomforts
BRI – Building Related Illness (Long term exposure – Years): This is more serious condition as a result to exposure to indoor contaminants over a longer period of time. Symptoms of diagnosable illness are identifiable and the cause of illness is directly attributable to environmental agents in air. Diseases include Legionnaire’s disease and Sensitivity pneumonitis
Carbon dioxide (CO2) < 1000ppm Ozone (O2) 8h mean < 100μg/m3 Carbonmonoxide (CO) 8h mean < 75ppm Formaldehyde < 0.1mg/m3
The Solution: Dilute / flush out indoor pollutants using clean outside air and prevent infiltration by positively pressurizing the area.
Ventilation removes or dilutes the pollutants, stale odors and provides a healthy and comfortable living environment, i.e. bring in more fresh air in the conditioned space.