Ned Hedrick wrote:
There is also a product called Inergen -- a mixture of 52% nitrogen, 40%
argon and 8% carbon dioxide -- that claims to be safe to the environment
and people.
It's less effective than mentioned HFC-227ea, FM-200, FE-227 products.
Inergen only adds to the air causing the total percentage of oxygen to
get low, to low to sustain the fire.
The mentioned gases are "active" that means the react with oxygen at
high temperatures (in the flame neighborhood) so locally oxygen
percentage gets extremely low, while average depends only on amount of
gas added.
--
Radoslaw Skorupka
Lodz, Poland
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