Mark and Michelle wrote:

This brings me back to the intent of my previous input on use of Halon in
the passenger cabin.  IMHO, if you are going to install a Halon
extinguishing system, after determining the (non)lethality of it to humans
in an enclosed space, you need to go the extra step and have an oxygen
system installed as well.  You are installing the Halon for safety, correct?

Nothing will incapacitate you quicker (and, as proved in numerous aviation
accidents lead to injury and death) than smoke and fumes in the cockpit.

Every Air Force aircraft that I have flown has had a procedure to follow to
minimize the effects of smoke and to clear the smoke from the aircraft.
Generally, the first step is usually to get on oxygen, then handle the
problem that is causing the smoke in the cabin, in the case of general
aviation, either an electrical short or a fuel fire.  Logically, the next
step in the safety chain is an oxygen bottle.  Expensive, but a life saver.

 
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