When does the low pressure warning alarm activate for fire fighters?

The low pressure warning alarm for firefighters activates at 25% of the air left in the SCBA (Self-Contained Breathing Apparatus). This standard threshold is designed to ensure that firefighters are adequately alerted to their remaining air supply well before it becomes critically low.

By activating at this level, firefighters are afforded enough time to assess their situation, make decisions about their operations, and exit hazardous environments safely. It is essential for maintaining safety in the field, as becoming trapped without adequate air supply can lead to life-threatening situations. The choice of 25% is a widely adopted safety standard in firefighting that balances the need for an early warning with the risks associated with operating in potentially dangerous conditions.