How do high energy foam proportioning systems differ from low energy systems?

High energy foam proportioning systems are characterized by the injection of air into the foam solution before it is discharged. This process creates a greater volume of foam with a finer bubble structure, which enhances the foam's ability to cover surfaces and suppress flames. By mixing air with the foam solution, these systems generate a more effective blanket of foam that adheres better to surfaces, particularly during firefighting scenarios where rapid and efficient application is crucial.

The use of air is a defining feature of high energy systems, as it increases the expansion ratio of the foam, allowing it to effectively extinguish fires involving flammable liquids. This differs from low energy systems, which typically do not introduce air at the same stage and therefore produce denser foam that may be less effective in certain situations.

Understanding this distinction is key for emergency response teams, as it aids in selecting the appropriate foam system for different fire scenarios, especially in aviation and industrial settings where hazardous substances are present.