What is Indoor Air Quality (IAQ)? As the cold weather sets in, we tend to spend a vast majority of our time indoors. This has never been truer than right now as we shelter in place to protect ourselves and our families from the COVID-19 pandemic. This means that keeping our home environment and indoor air quality (IAQ) clean and comfortable is more important than ever. Indoor air quality refers to condition of the air within the buildings we work, live, and spend any time in, and it is known to greatly affect the health, comfort and well-being of its building occupants.