Pollutants that affect indoor air quality are present in the form of gases or particles. Particles accumulate on surfaces in the form of dust. Dust inside buildings typically contains bacteria, various types of fungal spores, fibreglass, and other toxic, allergenic, or irritating substances. When there is more dust, the amount of these substances increases.
Occupant activity causes the dust to move around, making it become airborne and therefore susceptible to being inhaled by occupants, building up on their skin or re-settling on the surface of furniture until the next time it is moved.
Numerous studies have shown that the cleaner the air, the healthier it is. In fact, whenever dust levels rise in the air, there is a measurable increase in asthma and allergy attacks, A&E visits and deaths. This effect is quantifiable even at very low levels.
