I think Halotron is the replacement gas for Halon (?) Back a few decades ago, when I was on the fire fighting team at our manufacturing location, we had some Halon dump systems in the expensive electronics rooms. While Halon is great for putting out fires in enclosed spaces, it is also good for putting out people who happen to be trying to breathe in that enclosed room. As fire fighters, we had full protective gear including air packs, but the general lab occupants doing their daily work did not. So all those Halon systems were eventually ripped out of our electronic test rooms, for safety reasons. Be sure and do your research before attempting to mount a fire suppression system inside an enclosed space (like your car). In the event of a car fire, I would recommend opening the car door and leaving, rather than sitting inside and waiting for your fire suppression system to kick off and save you.