Is this 3D model free to download?

Yes, Ender 3 Fan Mod - Airflow Optimization is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link to open the original listing by the creator.

Where do I download the STL file?

The download is hosted by Thingiverse. Use the "Download from Thingiverse" link on this page to open the original listing and grab the file, or save it to your print queue in the free Thinger app.

Designed by Mr_Groch, published on Thingiverse. Please credit the creator when sharing your print.

Can I print this at home?

Yes. This is a printable 3D model intended for home FDM and resin printers. Check the original listing for suggested print settings.

Ender 3 Fan Mod - Airflow Optimization 3D printable model by Mr_Groch

Ender 3 Fan Mod - Airflow Optimization

Source: Thingiverse by Mr_Groch

The Ender 3 Fan Mod - Airflow Optimization is a free printable 3D model from Thingiverse by Mr_Groch. This is modified version of fan duct mod from Original part does not fit well to new Ender-3 revisions with silicon sock on nozzle. You can download the STL file from the original listing below and print it at home.

Open in Thinger (free) Download from Thingiverse

3,101 saves Source: Thingiverse Updated 2026-09-26 License: CC-BY · commercial OK 22 makes Category: 3D Printer

Tags: blower duct, blower fan duct, creality ender 3, Ender 3, fan duct

About this model

This is modified version of fan duct mod from Original part does not fit well to new Ender-3 revisions with silicon sock on nozzle. First - it touches the silicon sock, and melts there (made from ABS and printed ABS). Second - too small width of mount holes - it can be mounted but hard. This version has also shorter duct. Silicon sock on the nozzle of Ender-3 has very pool heat isolation, so normal version of this duct was heating a lot. Air inside was heated very quick, so cooling wasn't effective. This shortened version isn't heating so much from silicon sock, so air that exits duct is more cooler - pressure of air hitting print is smaller, but I think that is enough and still better than stock. I have also made an water test for air flow. It looks that air is hitting almost directly bel…

Frequently asked questions

Is this 3D model free to download?: Yes. Ender 3 Fan Mod - Airflow Optimization is free to download from Thingiverse. Open it in the free Thinger app, or use the "Download from Thingiverse" link above to open the original listing.
Where is the STL hosted?: The download is hosted by Thingiverse, not by Thinger. We link you directly to the original listing by Mr_Groch.
Who made this model?: Designed by Mr_Groch, published on Thingiverse. Please credit the creator when sharing your print online.
Can I print this at home?: Yes. This model is intended for home FDM and resin 3D printers. Check the original listing for suggested print settings like layer height and supports.

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