LACK 120mm fan duct for Noctua

[UPDATE: October 1, 2020]:
I uploaded a zip-file, which contains the .f3d and .step files for your convenience. Just delete the stl extension from the filename.

This is a remix of the 120mm fan duct from moriaty_ (https://www.thingiverse.com/thing:4495123). Credits to him!
I use this duct for my Noctua NF-A12x25 5V PWM, which I temperature control by a BM280 sensor connected to Octoprint with Enclosure plugin.
Here is also my housing I use for the sensor https://www.prusaprinters.org/prints/117037-lack-bme280-sensor-mount-for-ender-3

I took the design and made some adjustments to fit my needs:

• Moved the cable slot to the side wall because I have a suspended ceiling in my encloser that covers the wireing of the fan and LEDs. The ceiling is made of 2 layers of foam board (each 5mm).
• Added guiding slots on on two walls to ensure proper fit between top and bottom part and avoid slipping and rotation between the parts.
• Added three levels/compartments to the top part to insert carbon filter matts (10mm each).
  As I was unsure how many layers would be necessary the keep up a good air flow but still filtering the air I made 3 compartments. Currently I use two compartments for testing temperature control

*IMPORTANT: I extruded the inner distance from 50mm to 60mm due to the +10mm of the suspended ceiling. If you want to use my design, then please take this into account. Thanks!

• Removed the screw holes from the top part as not needed. The top can easily be removed for changing the filters.
• Did some cleanup of the original STL file.

Print Settings

Printer Brand:

Creality

Printer: 

Ender 3 Pro

Rafts:

No

Supports: 

Yes

Resolution:

0.2

Infill: 

20%

Filament:
[

Any PLA ](http://www.amazon.com/s?url=search-alias&field-keywords=Any+PLA&tag=thingiverse09-20) Any 
 

Notes: 

The supports are recommended for the top part to hold the corners for the filters. I used tree supports in Cura as they were easier to remove.

Post-Printing

To cut out the holes cleanly I used a Multi-Cutter from Bosch.
To mount lower part I used 4 x 4x20mm SPAX screws.

Cut-out for bottom part

Cut-out for top part

How I Designed This

Imported the original STL to Fusion 360, converted it to BRep and re-designed it.

If you like my stuff then please leave a 👍 and post a make. Thanks!