airing

Airing refers to the exchange or circulation of air in an enclosed space. In building ventilation, airing involves removing stale indoor air and supplying fresh outdoor air to maintain air quality and comfort. Ventilation can be natural, relying on openings and airflow, or mechanical, using fans, ductwork, and filtration. Indoor air quality depends on factors such as occupancy, temperature, humidity, and pollutant sources; standards bodies such as ASHRAE provide guidelines for ventilation rates expressed as air changes per hour or cubic meters per hour.

Airing also denotes the public broadcast of radio or television content. In this sense, to air a program means to transmit it over the airwaves at a scheduled time. The practice began with radio and expanded to television, streaming platforms, and on-demand services. The process can involve editing, censorship, and regulatory approval, depending on jurisdiction. The time at which a program is aired is called its airdate or broadcast date.

Airing can also refer to the act of publicly expressing opinions, concerns, or grievances. To air something publicly allows discourse and accountability but may also invite controversy. The phrase is commonly used in politics, media, and everyday conversation.

Originating from the sense of exposing something to air, the noun airing originally referred to letting air circulate or reach a space.