Radial Fan Fang
Free     Thingiverse     Lion4H

Radial Fan Fang

Does your layer fan make a sphere of air focused on the sweet spot checkout the video test below using radial fan 4020 for aerodynamic and then test yours to see if you are using all air output or just part of it ...

similar models —

Radial Fan Fang alternatives
Radial Fan
matgar