HotBox
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A tiny 200W PTC enclosure heater for Klipper printers. 100x52x177mm. ZeroG Nebula 255 Compatible.
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Model information
- Source
- Printables
- Category
- Other Printer Parts & Upgrades
- License
- Creative Commons — Attribution — Noncommercial — NoDerivatives
HotBox - a tiny enclosure heater
A compact 200W PTC enclosure heater designed for Klipper-based 3D printers. Just 100mm wide, 52mm deep and 177mm high.
WARNING: This project uses a resistive heating element inside an enclosed space. Built and configured incorrectly, it is a genuine fire risk. This project is shared as-is for experienced makers who understand the risks. If you're not comfortable working with high-current DC systems and thermal management, please don't attempt this build.
Features:
24V 200W PTC ceramic heater element (self-limiting)
125°C thermal fuse for failsafe protection
Dual 4020 axial fans (wired in parallel)
Klipper config with PID control, overtemp backoff and auto-restart
Magnetic lid for easy access
Compact enough to fit inside most enclosures
Fan duct variants included:
Generic fan duct (bolts to 2020 extrusion)
ZeroG Nebula specific duct
Print settings:
Material: ASA (preferred - slightly higher heat resistance) or ABS. High temp material is ESSENTIAL as they sit near a heated element.
Supports: No
Infill: 30%+
Full BOM, wiring diagram, installation instructions and Klipper config are on the GitHub repo: https://github.com/nark3d/HotBox
Inspiration:
BentoBox v2.0 by GalvanicGlaze - the compact design that started the idea
BentoBox Fan Duct for ZeroG by Morten Borge - the enclosure integration approach