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
Noctua doesn't make 4020 blower fans. Or do they? More to come : r/3Dprinting
Noctua NF-A4x10 Fan - 3DJake International
What is a quieter alternative to 50mm blower fan for part cooling?
Noctua spent four and a half years designing its quietest, strongest fan yet | PC Gamer