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Is it safe to leave a 3D printer running overnight?

3D printing is energy-efficient, typically costing only R0.20 to R0.90 per hour to run. It uses much less power than common household appliances like microwaves or heaters, allowing you to handle long print projects without significantly impacting your electricity bill. While generally safe, always ensure your printer has thermal runaway protection enabled and keep the area clear of flammable materials for peace of mind.