We have several large computer "machine rooms" that were equipped with Halon. They had to switch over to something else for a newer room, but were allowed to keep the current system and a large stash of refill Halon for the old system.
My concern is that out room with the halon has all sorts of stuff that shuts down (ventilation) and drop down door covers before the discharge. Me thinks it wants to take over the atmosphere in the room and if my laser has it's ventilation running, the halon may just get sucked out and just piss of AlGore.