Which abbreviation represents indoor air quality?

• A. HVAC
• B. IAQ
• C. OA
• D. PM

Answer: (B)

Indoor air quality is represented by the abbreviation IAQ. This term describes the condition of the air inside buildings as it affects occupant health, comfort, and performance, taking into account factors like pollutant levels, ventilation effectiveness, humidity, and temperature. HVAC refers to the mechanical system that conditions and circulates air, so it influences IAQ but is not the label for the concept itself. OA stands for outdoor air, which matters because bringing in outdoor air can impact indoor conditions, but it is not the term for the indoor air quality. PM stands for particulate matter, a type of pollutant you might measure when evaluating IAQ; it is a component of indoor air quality, not the overall abbreviation.