FM-200 calculator

Work out how much FM-200 clean agent your room needs and the cylinders to hold it, using the NFPA 2001 total flooding method. Then send the figures to us for a quote.

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FM-200 agent quantity calculator

Enter the size of the room to work out how much FM-200 (HFC-227ea) a total flooding system needs, and the cylinders to hold it. Based on NFPA 2001, Standard on Clean Agent Fire Extinguishing Systems.

Units

Metric (m, kg, °C) Imperial (ft, lb, °F)

Protected room

Length (m)

Width (m)

Room height (m)

Floor to ceiling.

Solid objects (m³)

Columns, beams and other fixed solid parts to take off.

Under the raised floor (m)

Depth of the floor void, if it is protected too. 0 if none.

Above the false ceiling (m)

Depth of the ceiling void, if it is protected too. 0 if none.

Fire hazard

Hazard class

Class A Class B Class C

Design concentration (%)

Lowest room temperature (°C)

NFPA 2001 design concentrations for FM-200: 7.0% for Class C electrical hazards, 6.7% for Class A ordinary combustibles. For Class B it is the fuel's cup burner value x 1.3.

Site

Site altitude above sea level (m)

Thinner air at altitude needs less agent. About: Nairobi 1,795 m, Kigali 1,570 m, Kampala 1,190 m, Addis Ababa 2,355 m, Dar es Salaam at sea level.

Your result

How it is worked out
Net protected volume
Design concentration
Specific volume of FM-200 vapour
Altitude correction
FM-200 agent needed rounded up
Cylinders

Request a quote by email Send on WhatsApp

Your request goes by email to sales@ethiopia.westwoodkenya.com through our contact form, or by WhatsApp to +254 733 276 276.

This is an estimate for planning. The final design (agent quantity, cylinders, pipe network and nozzles) is confirmed by our engineers with a site survey and a hydraulic calculation. It does not allow for openings that cannot be closed.

Fire classes and design concentration (NFPA 2001)

Class A: fires in ordinary combustible materials such as wood, cloth, paper, rubber and many plastics. FM-200 design concentration 6.7%.
Class B: fires in flammable liquids, oils, greases, tars, oil-based paints, lacquers and flammable gases. Design concentration: the cup burner value for the fuel x a safety factor of 1.3.
Class C: fires involving energised electrical equipment, such as server rooms and switch rooms. FM-200 design concentration 7.0%.

The calculator cannot be printed. Use "Request a quote by email" to receive your figures.