What characterizes good Indoor Air Quality?

Good Indoor Air Quality (IAQ) is characterized primarily by being free from unacceptable levels of contaminants. This means that the air within a building does not contain pollutants, allergens, or irritants in concentrations that could compromise human health or comfort. Contaminants can include a range of substances such as volatile organic compounds (VOCs), particulate matter, carbon monoxide, mold spores, and other pollutants that can arise from building materials, cleaning products, or outdoor air pollution.

While certain elements, like ventilation, humidity, and even pleasant scents, can contribute to a perception of good IAQ, these are not definitive characteristics. For example, floral scents can sometimes mask unpleasant odors but do not guarantee that the air quality is actually good. Similarly, high levels of humidity can lead to problems like mold growth and discomfort, undermining true air quality. While well-ventilated spaces can promote good IAQ by facilitating the exchange of indoor and outdoor air, they must still be monitored to ensure that incoming air does not contain contaminants.

Ultimately, the most crucial aspect of IAQ is the absence of harmful contaminants, which ensures a safe and healthy environment for occupants.