VentCore - Chamber Heater and Air Filtration Module

The VentCore is a purpose-built Hepa filter and activated charcoal filtration, heating, and cooling system designed specifically for the Snapmaker U1 and compatible printers. It keeps your ambient air clean, your print chamber warm, and your motherboard cool, controlled via Klipper, with zero permanent modifications to your machine. These are the 3D printed parts required to complete your assembly.

Why VentCore?

• Cleaner Air: High-efficiency HEPA filtration combined with an activated charcoal chamber scrubs harmful VOCs and ultra-fine particles (UFPs) generated during printing.

• Better Prints, Less Warping: Maintains a consistent chamber temperature to drastically reduce warping and improve layer adhesion when printing engineering filaments like ABS, ASA, and Nylon.

• Longer Printer Life: A dedicated external cooling fan targets the motherboard, preventing heat creep and reducing wear on critical electronics over time.

• Automated: Klipper integration activates and deactivates the system based on your nozzle temperature and filament type. Set it once and forget it.

• Open-Source & Customisable: Includes full STEP files and Klipper configuration macros so you can adapt, remix, and tune every part to your specific setup.

• Clean, Plug-and-Play Integration: All three modules pull control/power via the printer's existing 6-pin port (with a separate dedicated supply for the heater). No permanent wiring cuts or splices required.

You can find a working video here.

Parts list in the attached 3MF file:

• Filtration base (there are two variants, print "Base with No Heater" if you are not using the heater module)

• Filtration Fan housing

• Heater housing

• HEPA filter and Activated Charcoal housing

• Electronics enclosure

• Cooling fan holder

• Base covers (Optional. To be filled with Activated Charcoal)

Kits required:

• 1× 80 mm PWM fan (Air Filtration)

• 1× 40 mm PWM fan (Motherboard Cooling)

• 1× 15 mm thick HEPA filter

• 1× Digital temperature controller

• 1× 200 W PTC heater + Dedicated Power Supply

• 1× 5-channel PWM fan hub

• 1× 24 V to 12 V step-down converter

• 6-pin 2×3P connector

• 2x 100cm 14AWG wire

• 1x 50cm 14AWG wire

• 8x round magnets (3mm thick and 8mm in diameter).

You can also buy the electronics kit on my website, (printed parts also available for sale)

A full assembly guide can be found here.

To integrate the Klipper configuration, you need to do the following:

• Set your printer to developer mode if required

• Download the ventcore.cfg.

• In printer.cfg, add "[include ventcore.cfg]" after "[include fluidd.cfg]"

• Also within printer.cfg file, comment out (#) all the lines under "Purifier".

• Add ventcore.cfg file into your Printer's Klipper config directory (same directory as printer.cfg). 

• In your slicer's start gcode, add the following after "PRINT START" - ";===== chamber exhaust fan setup (added) ==========

  SET_CHAMBER_FAN_MATERIAL MATERIAL={filament_type[initial_extruder]}

  ;===================================================="

For cooling fan only,

• Copy the content of “Cooling Only.txt” file. Comment out as appropriate and paste in your printer.cfg config file (see last image).

• Also, comment out every line under “Purifier” in your printer.cfg config file.