Indoor air quality is now more important than ever before, especially as people spend almost all of their time inside homes or workplaces. A key factor that influences indoor air quality will be the cleanliness of the air ducts—the hidden network that circulates heated or cooled air after a building. https://hedgedoc.eclair.ec-lyon.fr/lKoQD-F-QHaZFnTjLbHcTg/