Ender 3 / Pro Fan duct for 40x40x20 Noctua
thingiverse
A simple Ender 3 / Pro fan duct to attach a Noctua 40x40x20mm (Noctua NF-A4x20 FLX) fan instead of the original one. The original part-cooling fan can be attached on the right side. You can use all the original screws. Be careful: The Noctua Fan needs 12V. The Ender 3 Pro (not sure about Ender 3) only supports 24V fans. A step-down module is needed. The Noctua fan doesn't blow as much as the original one. But in my case there were never be problems, even when printing ABS for a long time.
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