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C17 EXT v. 2022.07.24

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C17 -EXT, External HEPA Carbon filter

C17 -EXT, External HEPA Carbon filter

The C17-EXT filter replaces the standard filter of the Voron 2.4 and to add one on the Switchwire . It has a 120mm fan and can use the C17-EXT-Cartridge filter (HEPA 13 and Carbon) or commercial HEPA Carbon filters.

This is a first publication, although all parts has been tested, there may be errors do not hesitate to contact me.

2 configurations

With adapter for standard back panel Voron

With adapter for standard back panel Voron

With specific back panel

With specific back panel

For the Switchwire model only configuration 2 is possible.

2 options to replace the grid

Extractor for 125mm tube Extractor for 100mm tube

Assembly Manual



The list of parts is described in the manual according to the chosen configuration.


For the 120mm fan, follow the recommendations in the documentation. 3 models:

  • Efficient but noisy, the best choice (4000 rpm) : Aquatuning Alphacool 24810 ES (tested)
  • Less powerful but quieter (3000 rpm) : Noctua NF-F12 iPPC 3000 PWM (tested, acceptable for commercial cartridges)
  • Less powerful but quieter (3000 rpm) : Sunon MEC0251V1-000U-A99 (Not tested)

If you find other models at 4000 rpm, please send me the references.

Filter cartridge

Two possibilities :


The C17-EXT Activated Carbon Filter was modelled in Fusion 360.


A complaint is a gift. Please, help me to improve the C17-EXT filter !


Distributed under GNU General Public License version 3.0 (GPLv3)


Discord: OboMaker3D#0669 - ()


The Voron Dev Team


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