Jeff Spitzer wrote:

At 09:48 PM 6/23/99 -0700, you wrote:

Mark and Michelle wrote:

Be very careful about using Halon in the "passenger forward to firewall"
section.  You have a trade-off to consider:  Fire in the cabin, or

the use

of Halon which works by depleting oxygen.  Not a great idea in an

enclosed

space.  You may want to consider a different type of extinguisher for

the

cabin area.

Mark Lozier, Captain, USAF
lozier@theriver.com

Bill Freeman wrote:

I think this is incorrect.  As I remember the sales pitch on Halon was
that the concentration of Halon that will put out a fire is breathable
for humans for some significant period, like 10-20 minutes with no
ill effects.  This is opposed to CO2 which apparently extinguishes
fires and people with the same concentration.

Bill

IIRC, Halon extinguishes fires at a really low conc. like 5%.  People show
no effect for very long periods at these levels.  Typical usage (to be
sure) is like 15% halon which is breathable for many tens of minutes as
Bill pointed out.  CO2, OTOH, must replace the oxygen to put out a fire.
Therefore, it is lethal to humans WAY BEFORE the concentration is high
enough to put out a fire.

Jeff Spitzer

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