FM-200 (HFC-227ea) Design Concentration Calculator

Calculate FM-200 design concentration and agent quantity per NFPA 2001 for Class A, B, and C hazards

Input Parameters

Results

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Design Concentration
%
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Agent Quantity Required
lb
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Cylinders Required (120 lb)
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Max Enclosure Pressure
psf
Note: FM-200 design concentrations include a 10% safety factor above minimum extinguishing concentration per NFPA 2001. NOAEL for FM-200 is 9.0%, LOAEL is 10.5%. Always verify with manufacturer data.

Reference

NFPA 2001 Clean Agent Fire Extinguishing Systems FM-200 (HFC-227ea) Design Concentrations: Class A Surface: 5.8% (NOAEL: 9.0%) Class B Heptane: 6.7% Class C Electronics: 7.0% Class B IPA: 7.9% Weight formula: W = (V / s) × [C / (100 - C)] where s = specific vapor volume (ft³/lb)