Class F fire extinguishers are specifically designed to tackle fires caused by cooking oils and fats, which burn at very high temperatures and can’t be safely extinguished with water or standard extinguishers. Here’s how they work:

1. Specialized Extinguishing Agent:

Class F extinguishers contain a chemical solution that creates a fine mist. This agent is typically potassium-based, which reacts with hot oils and fats to form a soapy layer.

2. Saponification Process:

The potassium agent in the mist interacts with the burning oils, producing a chemical reaction called saponification. This reaction forms a foam-like, soapy substance that smothers the flames and cools the oil, cutting off oxygen and cooling the area.

3. Fine Mist Cooling:

The mist cools the hot oil without causing splashing, which is crucial for safety. Splashing would spread the fire, so the controlled misting prevents this while safely lowering the temperature.

4. Targeted Application:

The nozzle and hose on a Class F extinguisher allow users to aim the mist precisely, ensuring the burning oil is covered and reducing the risk of reignition.

Using a Class F extinguisher is simple but effective, making it ideal for kitchens and other environments with high fire risks from oils and fats.