How many low-air alarms are required by NFPA standards?

The requirement for low-air alarms as specified by NFPA standards is that there should be at least two low-air alarms on a Self-Contained Breathing Apparatus (SCBA). This is essential for ensuring the safety of firefighters in emergency situations, as having multiple alarms provides redundancy. A low-air alarm serves as a critical warning system to alert the user that the air supply is running low, allowing them to take appropriate action to exit hazardous environments before the air supply is completely depleted. By having two alarms, one can serve as a primary alert while the second acts as a backup, enhancing the reliability of the warning system. This redundancy is vital in maintaining situational awareness and ensuring that firefighters can safely manage their air supply in potentially life-threatening scenarios.