Gas under the brand name FM-200 (HFC227ea) is heptafluoropropane of the structural formula CF3CHFCF3. This gas suppresses a fire by inhibiting the chemical reaction of the combustible material and oxygen. It is used as a safe and efficient agent to suppress Class A fires (solid materials), Class B fires (flammable liquids) and Higher Hazard Class A fires (solid materials energized during the extinguishment period).

A fire suppression system using this gas is especially suitable on account of the following:

  • design concentrations of atmospheric gas (8.5% for server rooms) are not harmful to human health,
  • high fire extinguishing efficiency,
  • very rapid action,
  • minimum reduction of the visual range during fire fighting,
  • maximum dispersion of gas in the protected room,
  • good mixing of gas and air with no risk of air stratification,
  • the gas is noncorrosive, electrically non-conductive and does not cause cold shocks to electronic devices,
  • does not deplete the ozone layer (ODP = 0 / Montreal Protocol)
  • atmospheric lifetime is relatively short (33 years),

Properties of FM-200 gas:

  • ISO code: HFC-227ea
  • Name: heptafluoropropane
  • ODP (Ozone depletion potential) 0
  • ODP (Ozone deplation potential) 0
  • Atmospheric lifetime: 33 years
  • NOAEL 9.5%
  • LOAEL 10.5%
  • GWP (Global warming potential) 3500
  • Safety level (Class A fire) 13.9%