Why is controlled breathing important during exit from an IDLH atmosphere?

Controlled breathing is crucial when exiting an Immediately Dangerous to Life or Health (IDLH) atmosphere because it helps to decrease air consumption. In high-stress situations, such as those encountered in hazardous environments, firefighters may unconsciously begin to breathe more rapidly and shallowly, which increases the amount of air they use from their Self-Contained Breathing Apparatus (SCBA). By consciously slowing their breathing pattern, firefighters conserve their air supply, thereby extending the time they can remain in a hazardous environment and ensuring they have enough air to exit to safety.

Effective air management is vital for survival when dealing with IDLH conditions. If a firefighter uses air too quickly, they risk running out of breathable air before they can safely exit, which can lead to asphyxiation or panic. Therefore, practicing controlled breathing techniques not only optimizes air usage but also supports overall safety and decision-making during an emergency situation. This approach helps firefighters maintain their composure and make strategic decisions as they navigate back to safety.