Noctua 4020 Blower Mod (proof of concept) video in comments : r/3Dprinting
Creality Ender 3 Pro Hot End Noctua A4x20 Fan Upgrade 40mm x 20mm | FINALLY Some Silence! - YouTube
I wanted to upgrade my stock part cooling fan to a pair of noctua 40mm fans and when I did a test run they barely push any air through the ducts compared