Indoor Air Quality (IAQ) refers to the condition of the air within buildings and structures as it relates to the health and comfort of the occupants. It encompasses the presence and concentration of pollutants, as well as the overall ventilation and cleanliness of the air in enclosed spaces. The significance of indoor air quality is paramount, considering that people typically spend a substantial portion of their time indoors, whether at home, in offices, schools, or other indoor environments.

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A multitude of factors contribute to indoor air quality, including the presence of airborne pollutants such as dust, mold, pollen, pet dander, volatile organic compounds (VOCs), and various chemicals emitted from building materials and household products. Inadequate ventilation, high humidity levels, and poor maintenance can also compromise indoor air quality, leading to potential health issues.