Choosing the Right Fire Extinguisher for Your Business in Perth: Class A, B, C, D, or E?

 Selecting the correct fire extinguisher is a critical part of any business’s fire safety planning. In Perth, where commercial operations range from industrial facilities to offices and retail stores, understanding extinguisher classifications ensures compliance and protection across varied risk environments.

This guide outlines the main fire extinguisher types by class, helping businesses align their fire safety equipment to the hazards most relevant to their operations.

Fire Classes in Australia – What They Mean

Australian Standard AS/NZS 1850 defines fires in the following classes:

  • Class A – Fires involving solid combustibles like paper, wood & textiles

  • Class B – Fires involving flammable liquids such as petrol or solvents

  • Class C – Fires involving flammable gases like LPG or butane

  • Class D – Fires involving combustible metals such as magnesium or aluminium shavings

  • Class E – Fires involving electrical equipment

  • Class F – Fires involving cooking oils & fats (specific to kitchens)

Each class requires a specific extinguisher type to suppress the fire effectively and safely.

Types of Fire Extinguishers by Fire Class

Water (Class A)

Ideal for tackling fires involving paper, wood, or soft furnishings. Common in offices, schools, and retail environments.
 Not suitable for electrical or flammable liquid fires.

Foam (Class A & B)

Effective against flammable liquids such as petrol, making it suitable for garages, warehouses, and fuel storage areas.
 Caution: Not recommended near electrical equipment.

Dry Chemical Powder – ABE Rated (Class A, B, C & E)

A versatile option covering the most common business risks including flammable liquids, gases, and live electrical equipment.
 Used across workshops, construction sites, and logistics operations.
 Note: Powder residue may damage sensitive electronics.

Carbon Dioxide (CO₂) (Class E, some Class B)

Designed for electrical fires, CO₂ extinguishers are a key inclusion in server rooms, switchboards, and office IT setups.
 Leaves no residue—ideal where cleanliness is critical.

Wet Chemical (Class F & some Class A)

Specially designed for fires involving cooking oils & fats.
 Essential in commercial kitchens, cafes, and food preparation areas.

Specialist Powder (Class D)

Used only in industrial environments where metal fires are possible.
 Suitable for sectors dealing with magnesium, aluminium, or lithium materials.

Examples by Industry

  • Retail & Office Environments: Water or ABE dry powder extinguishers to handle paper, furnishings & basic electrics.

  • Workshops & Manufacturing: Foam and ABE units for fuel, solvent, and electrical risks.

  • Data Centres & Server Rooms: CO₂ extinguishers to prevent equipment damage.

  • Food & Hospitality: Wet chemical extinguishers installed in kitchen areas with deep-frying equipment.

  • Industrial Facilities: Specialist Class D extinguishers where combustible metals are processed.



Installation & Compliance

All extinguishers should be:

  • Compliant with AS 2444 for selection and location

  • Regularly inspected and tagged

  • Installed with compliant wall brackets and signage

  • Accessible, unobstructed, and clearly marked

Business owners should conduct a fire risk assessment to determine which fire classes are present and select extinguisher types accordingly.

Conclusion

Choosing the right fire extinguishers is not just about meeting compliance—it’s about ensuring workplace safety across varied risk environments. From electrical faults to flammable liquids or kitchen hazards, the correct extinguisher class makes a critical difference in early response effectiveness.

Access to certified, fit-for-purpose fire extinguishers in Perth ensures that each hazard type is addressed. When selecting fire safety equipment Perth companies should prioritise quality, compliance, and compatibility with their specific operational risks.

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