What does indoor air quality (IAQ) focus on?

Indoor air quality (IAQ) focuses on the environmental health aspects inside and around buildings. This concept encompasses the various indoor environmental conditions and the effects they have on human health and comfort. Factors such as air pollutants, humidity, ventilation, and overall air composition are crucial to understanding IAQ. Poor indoor air quality can lead to various health issues, including respiratory problems and allergies, thus highlighting its importance in maintaining a safe and healthy indoor environment.

The other options, while related to indoor conditions, do not capture the broader and more comprehensive scope of indoor air quality. For instance, air pressure in commercial buildings is one aspect of building management but does not address the various pollutants and health considerations integral to IAQ. Filtration systems and temperature control are components that can contribute to IAQ, but they do not encompass the entirety of what IAQ entails. Therefore, the focus on environmental health inside and around buildings is the most accurate representation of what indoor air quality actually includes.