What is the main purpose of a positive pressure air pack?

The main purpose of a positive pressure air pack is to keep contaminants from entering your mask. This is critical for the safety of emergency responders, particularly in hazardous environments where toxic smoke or chemicals may be present. The positive pressure feature ensures that the air inside the mask remains at a higher pressure than the outside atmosphere, preventing any external contaminants from infiltrating the breathing space. This helps to protect the wearer’s respiratory system, allowing them to focus on their tasks without the risk of inhaling harmful substances.

In contrast, while heating in cold environments, enhancing visibility in smoky conditions, and signaling for help during rescues are important considerations in emergency response, they do not directly pertain to the primary function of an air pack. Therefore, the focused design of the positive pressure air pack emphasizes respiratory protection in dangerous situations.