Which term refers to the attributes of the indoor air quality inside a building?

• A. IEQ
• B. IAQ (correct)
• C. Fenestration
• D. Infiltration

Answer: (B)

IAQ stands for indoor air quality and refers to the characteristics of the air inside a building that affect occupant health and comfort. This includes pollutant levels (dust, VOCs, CO2), humidity, temperature, odors, and how effectively ventilation is delivering fresh air and removing contaminants. IEQ is broader, covering thermal comfort, lighting, acoustics, and overall environmental quality, whereas IAQ focuses specifically on the air itself. Fenestration describes openings in the building envelope that influence airflow and daylight, not the air-quality attributes themselves. Infiltration is about unintended air leakage, a mechanism that can impact IAQ but isn’t the term for air-quality attributes. So the correct term for the attributes of the indoor air quality is IAQ.