Water, Powder, CO2 or Lithium — Which Fire Extinguisher Do You Actually Need?
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There isn't one universal fire extinguisher. Different fires need different extinguishing agents, and using the wrong one can make things dramatically worse. Spraying water on chip-pan fire, for example, turns it into a fireball. Spraying powder on a laptop battery does very little.
This guide walks through the four extinguisher types we sell at Safety in Store, when to use each one, and which one belongs in your home, vehicle, or workplace.
First — the six fire classes
Every fire is classified by what's actually burning. UK/Irish standards recognise six classes:
• Class A — solid combustibles: paper, wood, fabric, cardboard
• Class B — flammable liquids: petrol, oil, paint, alcohol
• Class C — flammable gases: butane, propane, methane
• Class D — burning metals: magnesium, sodium, lithium metal
• Class F — cooking oils and fats (deep-fat fryers)
• Electrical — technically not a class, but fires involving live electrical equipment need their own approach
Lithium-ion battery fires (phones, laptops, e-bikes, e-scooters, power tools) are a modern hazard that traditional Class D covers imperfectly — they need a dedicated extinguisher, which we'll come to below.
Water extinguishers (Class A)
Our 6L Water Fire Extinguisher CTX is the workhorse of Irish homes, offices, schools and rental properties. Water cools the burning material below its ignition temperature and is unbeatable on Class A fires (paper, wood, soft furnishings).
Do NOT use water on: electrical fires, cooking oil fires, or flammable liquid fires. It will spread the fire or conduct electricity.
Ideal for:
• Living rooms
• Hallways
• Offices
• Schools
• Rental properties
• Hotel corridors.
ABC dry powder extinguishers (Class A, B, C + electrical)
Multi-purpose powder — like our 1kg, 2kg and 6kg ABC Powder extinguishers — knocks down solid, liquid and gas fires plus electrical. It's the closest thing to a 'universal' extinguisher and the go-to for vehicles and workshops.
Downside: the powder is messy and corrosive to electronics, so we don't recommend it as the primary extinguisher in a room full of computers. Also less effective indoors due to visibility loss.
Ideal for:
• Cars
• Vans
• Motorhomes
• Boats
• Garages
• Small workshops.
Fire Safety Stick — the pocket-sized alternative
Our FSS50 (50-second) and FSS100 (100-second) Fire Safety Sticks aren't traditional extinguishers — they're compact, non-toxic aerosol devices that release a potassium-based agent to interrupt the chemical reaction of the fire.
They cover Class A, B, C, F and electrical fires, weigh under 500g, don't need servicing, and fit in a glovebox or kitchen drawer. Not a replacement for a full extinguisher in a rental property or workplace, but an excellent secondary device or gift.
Ideal for:
• Gloveboxes
• Campervans
• Small kitchens
• Lifts.
Lithium battery fires — a category of their own
Standard extinguishers do not reliably stop a lithium-ion battery fire once it's in 'thermal runaway'. The battery generates its own oxygen as it burns, meaning smothering fails. E-bike, E-scooter, laptop and power-tool battery fires are the fastest-growing house fire cause in Ireland.
Our Firechief 6L Lith-Ex G2 uses a specialised AVD (aqueous vermiculite dispersion) agent that encapsulates the burning cells and dissipates heat, stopping thermal runaway. If you own or charge e-bikes, e-scooters, or a lot of power tool batteries at home or work, this is the extinguisher you need — no traditional water, powder, or COn unit will do the same job.
Ideal for:
• Homes with e-bikes/e-scooters
• Bike shops
• Delivery companies
• Offices with heavy laptop use.
Cooking oil fires — a special case
Chip-pan and deep-fat fryer fires (Class F) are best handled by a fire blanket, not an extinguisher. Smother, don't spray. Every Irish kitchen should have one within arm's reach of the hob. Commercial kitchens with deep fryers should also carry a dedicated wet chemical extinguisher — we can source these on request, ask via the contact page.
Quick recommendation by setting
• Standard Irish rental property: 6L Water extinguisher + 1.2m × 1.2m fire blanket + smoke alarms + CO alarm
• Family home with a car: 6L Water extinguisher indoors + 1kg or 2kg Powder in the car + kitchen fire blanket
• Home with e-bike or e-scooter: add a Lith-Ex G2 to the above
• Campervan or motorhome: 2kg Powder + Fire Safety Stick + fire blanket
• Small office: 6L Water + fire blanket + smoke alarm + CO alarm if any fuel-burning appliance
• Commercial kitchen: 1.2m × 1.8m fire blanket + wet chemical extinguisher (ask us)
Still not sure? Message us via the contact page with the setting and we'll spec a kit within one working day.
Safety in Store — Irish-owned, Irish-shipped, safety in the bag