Air shafts are vertical passages within a building or structure, intended to allow air to circulate freely. Synonyms for air shafts might include ventilation ducts, air vents, or airways, all of which refer to structures designed to promote the flow of air. Other possible synonyms could include chimneys, flues, or exhaust vents, which specifically refer to structures designed to allow airborne pollutants to escape from a building. In some cases, air shafts may also be referred to as atria, which specifically refers to large, open vertical spaces within a building designed to promote natural airflow and ventilation. Whatever the name, these structures play an important role in maintaining good indoor air quality, promoting air circulation, and helping to prevent the buildup of hazardous or harmful airborne pollutants within a building.