Ladies and gentlemen, allow me introduce you The Magnificent Air Duct. I have created it to work with my Internal Waste Chute mod to provide efficient extraction of nasty stuff when printing ABS and other smelly materials.

Internal Waste Chute for Creality K2 Plus

- Small and light, saving filament and energy.

- Provides air extraction and recirculation.

- Can exhaust to either side of the printer.

- Uses adapters to different hose sizes (WIP)

- It has magnets !!!

- Looks nice.

You will need many 6x6 mm cylindrical magnets. The magnets require some force to press them into their recesses. The fan adapter is designed to hold a 80x25mm fan. I have used Creality's "Fume Extraction Kit" To get both a USB-pluggable fan and a hose for around 15 quid.

Alternatively, if you plan using a chamber heater, consider a regular 12V or 24V fan and a separate fan controller to regulate the amount of air extracted from the chamber. Adjusting fan speed helps to maintain chamber temperature while still keeping negative pressure inside the print chamber. Check out my USB-C powered fan controller that does just that.

The Fun Fan Controller

Note that the uploaded model has better color separation than one in the cover image.

In creating this model I used Creality logo model by Ideaprint3d (https://cults3d.com/en/users/Ideaprint3d/3d-models).

Model files:

- Window adapter - low profile adapter for window vents, prints with minimal supports.

- Window adapter NG - improved airflow, but more supports are needed.

- Male and female 74mm OD adapters - those fit well into the Creality's hose and have a gentle 5deg twist to simplify routing.

- End cap - used to close off the open end of the duct. Print a second one to make a recirculation chamber.

- Fan adapters 1 and 2 - that's where the fan goes.

The Magnificent Air Duct for Creality K2 Plus

0.2mm layer, 3 walls, 15% infill

0.2mm layer, 2 walls, 15% infill

0.2mm layer, 2 walls, 15% infill