YET ANOTHER Ender 3 Fan Duct Mod

thingiverse

I wanted a **fast print**, a **direct replacement** of the stock duct and of course, **better part cooling** to avoid blowing on the nozzle while also ensuring it wouldn't hit the clips holding my glass bed. Another important thing was achieving **smoother inner airflow**. All the mods I found had really sharp edges inside and I assumed that would create a lot of turbulence, which would be a waste of energy given how weak my fan is. This one should perform better in that regard. ### You'll find three STLs here. The inner duct is exactly the same in all of them, it's the outer shell that changed. V3 is my favorite since it's the smallest and doesn't hit the clips on the edge of the bed! All the mods I found were either **too bulky** with very little benefits or didn't fit correctly. Another problem I found was that similar mods were also a bit large and they would hit the clips holding the bed glass. I measured the distance to the nozzle, and the center of the curve of the exit part of the duct should more-or-less be there. Just keep in mind that there were a lot of measurements by eye, and it's not something designed by an engineer. I did do some water tests and they're okay, I guess. Definitely better than the stock fan duct. I'd like to make the air blow a bit more under the nozzle since right now I think it's a bit far, but still works nice. # Results I found noticeable improvements in overhangs - doing a 70º overhang test doesn't see as much curling and the bottom face is much smoother. Still, not something too huge. # Design I made this in Onshape, if you want to copy my design and modify it: https://cad.onshape.com/documents/ace39ddaf1738f8b2d2022f4/w/6b3fa3041e016c1bdb6e6c2f/e/f9009f8c18746042c4282d8d