How long does oxygen last in the PBE?

The duration of oxygen supply in a Protective Breathing Equipment (PBE) is designed to last for approximately 15 minutes. This timeframe is critical in emergency situations, as it allows individuals to escape hazardous environments, particularly during aircraft emergencies where smoke or fire may be present. The 15-minute duration is based on the average time needed for personnel to navigate through potentially dangerous conditions safely. This time frame is established to balance between the need for sufficient breathing air and the practicality of carrying a manageable size and weight of the equipment.

Understanding this duration is essential for emergency responders who may need to utilize PBE during evacuations or when assisting others in smoke-filled areas. It is also important for planning and training, ensuring that personnel are prepared for the constraints presented by the PBE's air supply limits.