PSA: When ordering new, quiet fans for your printer from Noctua, please note there is a small difference between NF-A4x20 and NF-A20 ... Ooops : r/3Dprinting
Hotend fan duct upgrade - Ender 3 V2 by Svenn Inge | Download free STL model | Printables.com
Official Creality Ender 3 Fan Upgrade 4010 Fan 24v Set(3PCS),40x40x10MM DC 24V Extruder Hot End Fan and Axial Cooling Fan for 3D Printer, Turbo Fan for Ender 3/Pro/Ender 3 V2, Ender 5
ENDER 3 SILENT FANG NOCTUA V2 by aherriau - Thingiverse
Upgrading Ender 3 Fans with Noctua 40x20 for Quieter Printing - YouTube
Ender 3 Hot End Cooling Enclousure for Noctua 40x20 Fan /w BL-Touch Mount 3d model