What do gasper air outlets do in an aircraft?

Gasper air outlets serve as air vents within the aircraft cabin. These adjustable openings allow passengers to direct a stream of air, which can enhance comfort during flight. The ability to control the airflow direction and intensity helps ensure that individuals can personalize their immediate environment according to their preferences, contributing to an overall better passenger experience on board.

As for the other options, regulating cabin pressure is primarily managed by the aircraft's pressurization systems, while supplying hot air to the cabin is typically done through the heating system, not specifically by gasper outlets. Controlling the flow of fresh air into the cabin is a function of the overall environmental control system in the aircraft, rather than the specific role of gasper air outlets.