FM 200 FIRE SUPPRESSION, an automatic extinguisher for the heavy equipment industry and others and also suitable for electrical rooms such as Panels, Servers, Transformers etc. Using FM200 gas media which is more effective than other gas media. ETI FM-200 (HFC 227ea, known chemically as Heptafluoropropane is a colourless, odourless gas that is liquefied under pressure for storage. It is thermally and chemically stable, but without the extremely long atmospheric lifetime associated with other proposed Halon replacements.