3D Printer fire hazards. It happens. Fortunately not often. But it does. And lets be honest. A lot of us leave our printers running unattended (you really sit there for 20,30,40 hours or more watching?)
Just stumbled across an interesting fire suppression device.
http://www.havenfiresafety.com/
Basically it’s a heat activated, single use, dry chem fire extinguisher. It’s primary intent is to be installed in the ceiling over your stove. Once enough heat reaches it, it dumps. (it’s heat based, not smoke based - no few false positives, but also won’t trigger until there’s a good fire going).