Bad indoor air quality is typically caused by a combination of trapped pollutant sources, inadequate ventilation rates, and poor moisture control within a tightly sealed building. Common chemical culprits include volatile organic compounds emitted by synthetic building materials, paints, new furniture, and harsh chemical cleaning aerosols, alongside dangerous combustion gases like carbon monoxide leaking from faulty heaters or stoves. Biological pollutants such as mold, mildew, and bacteria thrive in damp, unventilated areas like basements and bathrooms, while dust mites accumulate on carpets and soft furnishings. Furthermore, modern energy-efficient homes often trap these airborne contaminants inside because ventilation systems fail to provide an adequate and continuous exchange of fresh outdoor air.
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