Fireproof your household 3D Printer!
...demonstrating why hobby level 3d printers should be run with with automatic fire protection equipment. The temperature of the melted aluminum heater block is approx. 1,221°F, which can easily ignite most plastics.
For more information on fire prevention equipment, follow the link: https://www.reddit.com/r/3Dprinting/comments/6cgft0/alright_lets_talk_3d_printer_fire_prevention/