When wearing SCBA, which is a primary limitation to consider?

When using self-contained breathing apparatus (SCBA), the duration of the air supply is a primary limitation to consider because it directly impacts a firefighter's operational time and safety during firefighting activities. SCBA units contain a finite amount of breathable air, typically measured in minutes depending on factors such as the size of the tank, the user's physical exertion, and the environment's conditions.

As the air supply depletes, firefighters must monitor their usage to ensure they have enough air for both the task at hand and for safe exit from hazardous situations. Running out of air can lead to dangerous situations and the potential for panic. Therefore, understanding and managing this limitation is crucial for ensuring the safety and efficiency of fire operations.

Other factors like the weight of the equipment, visibility reduction, and communication barriers are also important to consider when using SCBA, but the duration of air supply is essential as it determines how long a firefighter can safely work in an atmosphere that is considered immediately dangerous to life and health (IDLH).