Indoor air quality (IAQ) is the air quality within and around buildings and structures. The air you breathe has a direct impact on your health, well-being, and productivity. Poor indoor air quality has been associated with a range of health problems, from respiratory illnesses to headaches and fatigue. This is particularly concerning in commercial buildings, where people spend a significant amount of time each day. But how can you ensure that the air you breathe indoors is of good quality?