How long can someone stay in an elevator without suffocating?

The duration someone can stay in an elevator without suffocating depends on several factors, including the size of the elevator, the number of occupants, and the ventilation system. In a typical elevator, there is usually enough air for a person to survive for several hours, potentially up to 8-12 hours, assuming it remains sealed and there are no additional occupants. However, without ventilation, carbon dioxide levels would rise, leading to discomfort and, eventually, suffocation. In emergencies, it’s crucial to utilize the elevator's emergency communication system to seek help.