Gasper (aircraft)

In aviation, a gasper is an individual, adjustable outlet vent for ventilation in passenger transport aircraft.

In a typical modern jet airliner, gaspers take the form of small, circular vents above each passenger seat that can be adjusted by passengers for their personal comfort. A revolving control on the vent can be turned to adjust ventilation between no air output at all and a fairly substantial breeze.

Gaspers usually receive their air from the air conditioning packs aboard the aircraft, which in turn receive compressed, clean air from the compressor stages of the aircraft's jet engines. A master control for gaspers is located in the cockpit, and gaspers may be temporarily turned off during certain phases of flight, when the load on the engines from bleed-air demands must be minimized ("e.g.," take-off and climb).