5kg Co2 Fire Extinguishers
A 5kg CO2 fire extinguisher is designed for areas where electrical equipment and flammable liquid hazards demand a stronger clean-agent response than a smaller unit can provide. It suits workshops, server rooms, plant areas and electrical intake points because it leaves no residue, offers longer discharge time and helps you protect sensitive equipment during first response.
Where a 5kg CO2 unit is the better fit
Install this model where you have higher electrical exposure, larger open equipment areas or a greater chance that a small 2kg unit may feel underpowered. It is well suited to workshops, generator rooms, server rooms, industrial units and electrical intake areas where you need residue-free discharge and fast access without placing the extinguisher behind machinery or inside cupboards. It should remain clearly visible from the normal approach route to the risk area.
Mounting height, discharge time and fire rating meaning
At 11.8kg, this is a heavier extinguisher, so wall mounting should usually place the handle at about 1 metre or 3.3 feet from floor level, or it can sit on a suitable stand where wall fixing is unsuitable. Discharge time is 16.8 seconds. The 89B rating is a Class B flammable-liquid test rating, not an official room-size figure in m², so there is no reliable square-metre conversion to claim.
What you gain by placing it correctly
When you position a 5kg CO2 extinguisher near the right electrical and liquid-fuel risks, you give people a longer first-response window, better reach in larger equipment spaces and a cleaner way to tackle incidents without coating machinery in residue.
- ✅ Longer discharge for larger risk areas
- ✅ Cleaner protection around switchgear and electronics
- ✅ Stronger Class B response than a 2kg unit
Technical details that matter for this 5kg CO2 extinguisher
- Type: 5kg CO2
- Fire rating: 89B
- Nominal weight: 11.8kg
- Discharge time: 16.8 seconds
- Class B fire use
- Suitable for live electrical risks
- Clean searching agent
- Hose and horn protection
- Squeeze grip control
- Easy pull safety pin
- Bracket supplied
- Wall mount or floor stand use
- Red body with black CO2 EN3 band
- CE Marked
- BS EN3 compliant
Practical set-up advice before you fix it in place
- ❌ Avoid relying on it where paper, timber or textiles are the main fuel
- ❌ Do not place it where access is blocked by benches, racks or plant
- ❌ Do not hide it inside locked service cupboards
- ❌ Small desk-only office areas may not need the extra size and weight
- ❌ Tight corridors can make a larger unit less convenient to handle
- ❌ It is not your answer for kitchen oil fire risks
- ✅ Use it near switchgear, plant, workshops and heavier-duty electrical points
- ✅ Choose wall fixing for permanent locations or a stand where drilling is unsuitable
- ✅ Pair it with other extinguisher types where your fire risks are mixed
5kg CO2 fire extinguisher questions you are likely to ask
When should you choose a 5kg CO2 extinguisher instead of 2kg? Choose 5kg when the electrical risk area is larger, the hazard is more demanding or you want longer discharge time than a compact office-sized CO2 unit can offer.
Is a 5kg CO2 extinguisher suitable for server rooms and plant areas? Yes. It is widely used in server rooms, generator spaces, workshops and electrical intake rooms because CO2 leaves no residue on sensitive equipment.
Can this extinguisher deal with flammable liquid fires? Yes. It is rated for Class B fires involving fuels, solvents and other flammable liquids, provided the fire is within the capability of the extinguisher and the area is assessed correctly.
What does 89B actually tell you? It tells you the extinguisher passed a Class B flammable-liquid test at that level. It is not a room-size measurement and should not be treated as an m² coverage claim.
Should a 5kg CO2 extinguisher be your only extinguisher? Usually not. In many premises it is paired with another extinguisher, such as water or foam, so you also have suitable cover for ordinary combustible materials.
Why this 5kg CO2 extinguisher is chosen for tougher electrical areas
- ✓ 5kg CO2 charge for larger electrical risk locations
- ✓ 89B tested Class B performance
- ✓ Hose and horn set-up improves handling in use
- ✓ Bracket supplied for fixed positioning
- ✓ Gives you more discharge time than a compact CO2 unit
- ✓ Helps protect machinery without powder or foam residue
- ✓ Better suited to wider plant and workshop spaces
- ✓ Supports stronger first response where liquids and electrics mix