Universal PC Fan Duct with CAD [Parametric]
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Adjustable Fan Duct for computers: Enhance Airflow, Reduce Noise, FREE, Parametric CAD included.
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Model information
- Source
- Printables
- Category
- Computers
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
Compatible with any case, it can help improve airflow by reducing dead spots and give a slight noise reduction for fans by distancing fans from heatsink or radiators. (Extreme example below)

How to resize the CAD:
First, open Scalable Fan Shroud v2 Parametric with Fusion360.
Parameters
SIZE - Defines fan size for the model. 120-140 recommended.
HEIGHT - Defines total height of the shroud model.
OFFSETs - angles the walls of the exhaust. This is optional for advanced tinkerers.
*Going beyond recommended values kind of works, but it's more like a duct at that point.
You can even scale WITHOUT CAD, you can scale UNIDUCT140.3mf, UNIDUCT120.3mf via slicer - those were the original free fan shroud models from Modcase.com.au
Any questions feel free to message me.
Enjoy! Haydn Bao