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Types of Fire Extinguishers

Understanding the different classes of fire is essential before selecting the correct type of fire extinguisher. Each extinguisher is designed to tackle specific fire risks, and using the wrong one can be ineffective or even dangerous. The sections below outline the main fire classes followed by the extinguishers suitable for each type.

Types of Fire

  • Class A - Solids: Fires involving solid combustible materials such as wood, paper, textiles and plastics.
  • Class B - Liquids: Fires involving flammable liquids including petrol, paraffin, solvents and oils.
  • Class C - Gases: Fires involving flammable gases such as propane, butane and methane.
  • Class D - Metals: Fires involving combustible metals including aluminium, magnesium and titanium.
  • Class E - Electrical: Fires caused by electrical equipment (note: “Class E” is not an official fire class, but widely used to describe electrical fire risks).
  • Class F - Cooking Oils & Fats: Fires involving deep‑fat fryers, cooking oils and high‑temperature fats.

Types of Fire Extinguishers

Water Extinguisher (Class A)

Suitable for fires involving solid combustible materials such as wood, paper, cloth and plastics.

Water Spray Extinguisher (Class A)

Designed for the same risks as standard water extinguishers but with improved firefighting performance due to the fine spray pattern.

Water Mist Extinguisher (Class A, B, C & F)

A broad‑spectrum extinguisher effective on Class A, B, C and F fires. Models filled with de‑ionised water and tested to 35kV can be used on electrical fires (up to 1000V) when a 1‑metre safety distance is maintained. The fine mist does not conduct electricity and avoids pooling on the floor.

Powder Extinguisher (Class A, B & C)

Effective on fires involving solids, flammable liquids and gases. Not suitable for chip‑pan or deep‑fat fryer fires.

Dry Powder (Specialist) Extinguisher (Class D)

Designed specifically for combustible metal fires such as lithium, magnesium, sodium and aluminium in swarf or powder form.

Foam Extinguisher (Class A & B)

Suitable for solid combustibles and flammable liquid fires such as petrol and paint. Safe for accidental use on electrical fires if tested to 35kV and used with a 1‑metre safety distance.

Wet Chemical (Class F)

The preferred extinguisher for cooking oil and fat fires, including deep‑fat fryers and high‑temperature oils such as olive, sunflower and maize oil.

Fire Blanket

Made from fire‑resistant materials and ideal for smothering small pan fires or wrapping around a person whose clothing has caught fire. Fire blankets should be replaced after use.

For further information about our fire extinguisher services or to discuss your requirements, our customer service team is here to help.