What are two primary types of breathing apparatus used by firefighters?

The two primary types of breathing apparatus used by firefighters are Self-Contained Breathing Apparatus (SCBA) and Air Purifying Respirators (APR).

Self-Contained Breathing Apparatus are essential for firefighting as they provide a breathable air supply from a tank strapped to the firefighter's back. SCBAs are particularly crucial in environments that are immediately dangerous to life and health (IDLH), such as those filled with smoke, toxic gases, or low oxygen levels. This apparatus enables firefighters to perform their duties safely in hazardous conditions where normal respiratory functions would be compromised.

Air Purifying Respirators, on the other hand, filter the air that is already present in the environment, removing harmful contaminants and allowing firefighters to breathe safely. However, APRs are suitable only in specific situations where there is enough oxygen available in the air, and they cannot be used in IDLH environments.

This distinction between SCBAs and APRs is vital in emergency situations, making them the primary choices for firefighters depending on the nature of the incident they are responding to. Other options, such as hazardous material suits, ventilation hoods, and masks, do not serve as primary breathing apparatus for general firefighting applications, but rather as protective gear or for specific