Fire Extinguisher Placement: How Many Do You Need?
Fire extinguisher placement depends on coverage area, travel distance, and hazard type. Learn how many extinguishers your building needs.
Fire extinguisher placement follows three rules: enough units to cover the floor area for the hazard level, no point further from an extinguisher than the maximum travel distance, and the right type for each zone. Under NFPA 10, maximum travel distance is about 23 metres for ordinary combustibles and about 15 metres for flammable liquids.
Introduction
Fire extinguisher placement is where many buildings fall short. The right number of extinguishers can still fail inspection if they sit in the wrong spots, hang too high, or use the wrong agent for the hazard.
This guide explains how to work out how many extinguishers a building needs, how far a person should have to walk to reach one, and how to match the type to each zone. It is written for building managers, tenants, and business owners across the UAE.
Requirements in the UAE follow the Fire and Life Safety Code of Practice, which draws on NFPA 10, and UAE Civil Defence has the final say on approvals. Use the figures here as a planning guide and confirm them against your approved drawings.
Key Takeaways
- The number of extinguishers depends on floor area, hazard level, and the rating of each unit.
- Travel distance is measured along the walking route, not in a straight line.
- Kitchens, server rooms, and electrical rooms each need a different extinguisher type.
- Extinguishers must be visible, unobstructed, and mounted at the correct height.
- Area calculations give a minimum, and partitioned layouts usually need more units than the formula suggests.
How Many Fire Extinguishers Does a Building Need?
The number depends on floor area, hazard classification, and the rating of each extinguisher. Higher hazard means less area covered per unit, so more extinguishers.
NFPA 10 uses three hazard levels for ordinary combustibles. The table shows the coverage allowed per rating unit and the minimum rating.
| Hazard Level | Typical Occupancy | Area per 1-A of Rating | Minimum Rating |
|---|---|---|---|
| Light | Offices, classrooms, places of worship | About 279 m² | 2-A |
| Ordinary | Retail, light manufacturing, parking areas | About 139 m² | 2-A |
| Extra | Woodworking, heavy storage, workshops | About 93 m² | 4-A |
No single extinguisher may be counted for more than about 1,045 m² of floor area at any hazard level.
A Worked Example
Take a 1,000 m² open office floor at ordinary hazard, using 2-A extinguishers. Each unit covers about 279 m², so the area calculation gives a minimum of four. That is only the starting point. Once partitions, meeting rooms, and corridors are added, travel distance usually pushes the real figure higher.
What Are the Travel Distance Rules?
A person should reach an extinguisher within about 23 metres for ordinary combustibles and about 15 metres for flammable liquids. Distance is measured along the actual walking path, around walls and furniture.
- Class A (paper, wood, fabric): about 23 metres maximum
- Class B (flammable liquids): about 15 metres maximum
- Class K (cooking oils): about 9 metres maximum
- Visibility: units should be easy to see and close to exit routes
- Mounting height: top of units up to about 18 kg no higher than about 1.5 metres from the floor
- Ground clearance: bottom of the unit at least about 100 mm above the floor
Glass partitions and corridors can double the walking distance compared with the straight line. Measure the route on site rather than on the drawing.
Which Extinguisher Type Suits Each Zone?
Match the agent to the hazard in the room. A general-purpose unit in the wrong place can fail or make the fire worse.
| Zone | Suitable Type | Reason |
|---|---|---|
| General office and corridors | ABC powder or water | Covers paper, plastics, and some liquids |
| Commercial kitchen | Wet chemical (Class K) | Cools and seals burning cooking oil |
| Server and data rooms | CO2 or clean agent | Leaves no residue on equipment |
| Electrical and switch rooms | CO2 | Safe on live electrical equipment |
| Generator rooms and workshops | ABC powder or foam | Handles fuel and mixed fires |
Our guide to fire extinguisher types and their uses explains each agent in detail. For kitchens, extinguishers are a backup to a fixed kitchen hood suppression system, not a replacement.
What Are the Most Common Placement Mistakes?
The most common mistakes are blocked access, wrong height, and wrong type for the zone. Inspectors spot all three in minutes.
- Extinguishers hidden behind doors, plants, or stored boxes
- Units standing on the floor instead of being wall mounted or in a cabinet
- Mounting too high for staff to lift safely
- Only one extinguisher near the entrance, with none deep inside the floor
- CO2 or water units placed where a different agent is needed
- Missing signage above or beside the unit
- Expired service tags or damaged pressure gauges
How Often Should Extinguishers Be Inspected?
Check each extinguisher visually every month and have it serviced by a qualified provider at least once a year. NFPA 10 also sets longer intervals for internal examination and pressure testing, depending on the extinguisher type.
The monthly check covers the pressure gauge, safety pin, seal, hose, and access. Record every check and replace or refill extinguishers as soon as they fall outside the green zone or past their service date. For service intervals specific to UAE requirements, see our guide to fire extinguisher servicing in the UAE.
How Do You Plan an Extinguisher Layout?
Work from the floor plan, then verify on site. A good layout is planned zone by zone, not as a single count for the whole building.
- Mark each zone and assign a hazard level.
- Calculate the minimum number of units from area and rating.
- Place units along exit routes and near hazards.
- Walk the real routes and check that no point exceeds the maximum travel distance.
- Choose the extinguisher type for each zone.
- Add signage, record each unit, and schedule inspections.
The NFPA 10 standard sets the full rules on selection and placement.
Why Choose Safe & Secure Fire Protection
We plan extinguisher layouts by walking the actual routes, not only reading the drawing. That is how we catch the glass partitions, locked store rooms, and pantry corners that stretch real travel distance beyond what the plan suggests.
- Certified technicians who match agent type to each zone
- Genuine, approved extinguishers with correct service tags
- Experience with offices, warehouses, kitchens, and plant rooms across the UAE
- Layouts that fit your building's approved fire drawings
We also supply approved equipment through our fire equipment trading service.
Frequently Asked Questions
How many fire extinguishers does my building need?
The number depends on floor area, hazard level, and the rating of each extinguisher. As a guide, a light-hazard office needs one 2-A unit for roughly every 279 m², and higher hazards need more. Travel distance then adds more units on partitioned floors. Have a qualified provider confirm the final count against your approved drawings.
What is the maximum distance to a fire extinguisher?
The maximum travel distance is about 23 metres for ordinary combustibles, about 15 metres for flammable liquids, and about 9 metres for cooking oil fires. Measure the real walking path rather than a straight line. Walls, glass partitions, and furniture all extend the actual distance.
How high should a fire extinguisher be mounted?
For units up to about 18 kg, the top of the extinguisher should be no higher than about 1.5 metres from the floor. The bottom should be at least about 100 mm clear of the ground. Heavier units need lower mounting so staff can lift them safely. Always keep the area in front clear.
Can one extinguisher type cover the whole building?
No. ABC powder works for general areas, but kitchens need wet chemical, and server or electrical rooms usually need CO2 or a clean agent. Using one type everywhere can leave critical zones poorly protected. Assign the type zone by zone based on what could burn.
Do extinguishers need to be inside cabinets?
Not always. Extinguishers can be wall mounted on brackets or placed in cabinets, as long as they are visible, accessible, and not blocked. Cabinets are useful where units could be knocked over, in public areas, or where appearance matters. Signage should show the location either way.
People Also Ask
How many extinguishers per square metre are required?
There is no single figure per square metre. The count depends on hazard level and extinguisher rating. As a light-hazard guide, one 2-A unit covers about 279 m², while ordinary hazard covers about 139 m² per A rating.
Where should fire extinguishers be placed in an office?
Place them along exit routes, near corridors, and close to higher-risk spots such as pantries and printer areas. Keep them visible and unobstructed, and check that no desk is beyond the maximum travel distance.
How often should fire extinguishers be replaced?
There is no fixed replacement date for all units. Extinguishers are serviced, refilled, or tested at intervals set by type and condition. Replace any unit that is damaged, corroded, or fails inspection.
Conclusion
Getting extinguisher placement right means thinking in zones rather than counting units. Work out the minimum from area and hazard, test it against the real walking distance, and match each agent to what could burn in that room.
Then keep up the monthly checks and annual service so every unit works when needed. If you want a layout reviewed or a missing zone covered, contact Safe & Secure Fire Protection for a site visit and a clear placement plan.