How long can passenger oxygen masks supply oxygen?

The oxygen supplied by passenger oxygen masks is designed to provide a continuous flow of oxygen for a duration that supports passengers during critical moments, such as in the event of cabin depressurization. Typically, these oxygen systems can deliver oxygen for a duration around 12 to 15 minutes, ensuring that there is enough time for the aircraft to descend to a safer altitude where breathable air is available.

Opting for 13 minutes is a reasonable choice, as it reflects an average estimation that falls within the industry standards for passenger oxygen systems. This time frame is intended to be more than enough to maintain passenger safety and support during an emergency descent without exceeding a standard operational limit. It is vital for those aboard to have access to adequate oxygen for the lengths of time indicated, ensuring they can breathe comfortably until conditions improve or evacuation procedures are in place.