Proper training on the correct use of a system the size typically found in large server rooms is definitely needed in order to prevent "dead".doesnt halon eat oxygen so that the fire cant burn? in an enclosed space, would it not suck the oxygen out of your lungs and kill you? I know in our work server room if you hit the fire alarm you have to make sure everyone is out and then hit a secondary button under a battle switch and it counts down and when the timer goes it sets off the halon and if youre not out...youre dead
Hand-held halon extinguishers or small (5-20#) auto units will not, however, "suck the oxygen out of your lungs".