Fire Extinguisher Placement Calculator
Calculate fire extinguisher count and spacing by hazard class per NFPA 10.
Inputs
Results
Extinguishers per Floor
1
Total Extinguishers
2
Max Travel Distance (ft)75
Coverage per Unit (sq ft)11,250
Min Rating Class3
Total Purchase & Install Cost$150.00
Annual Maintenance Cost$30.00
Min Rating2-A
How to Use This Calculator
- Enter Floor Area (sq ft), Hazard Class, and Number of Floors.
- Review Extinguishers per Floor and Total Extinguishers.
- Use Max Travel Distance (ft) and Coverage per Unit (sq ft) to inform your decision.
What each input means
- Floor Area (sq ft)
- Total floor area per floor.
- Hazard Class
- 1=Light-A, 2=Ordinary-A, 3=Extra-A, 4=Class B, 5=Class K (kitchen).
- Number of Floors
- Total building floors requiring extinguishers.
How this is calculated
Worked example, using the default values
- Identify Input ParametersFloor Area (sq ft) = 10000, Hazard Class = 2, Number of Floors = 2 = 3 input(s) provided
- Calculate Extinguishers per FloorExtinguishers per Floor1 = 1
- Calculate Total ExtinguishersTotal Extinguishers2 = 2
- Calculate Max Travel Distance75 = 75
- Calculate Coverage per Unit11250 = 11250
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