What is the main difference between high velocity and low velocity patterns in firefighting?

The primary distinction between high velocity and low velocity patterns in firefighting lies in their intended use and application, particularly in direct fire attacks and protective measures. High velocity patterns are designed to deliver water at a greater speed and pressure, enabling firefighters to directly attack flames and effectively penetrate a fire's core. This approach is critical when swift and aggressive action is necessary to suppress or control a fire before it spreads further.

In contrast, low velocity patterns disperse water in a more spread-out manner, providing a protective barrier or heat shield rather than aiming directly at the source of the fire. This technique is advantageous for creating a safety zone for firefighters and victims or for cooling superheated gases without aggressively attacking the flames.

Understanding these differences is crucial for selecting the appropriate firefighting strategy based on the situation. The choice of water pattern affects not only the efficiency of the firefighting effort but also the safety of the personnel involved.