Improved dimensions. See Sergiienko Valentyns original for more details. If you use Polymaker PolyMide CoPA like me: Printing it all in one piece with supports is an option, but the supports are a struggle to remove as is default with this filament.
Printed with the not recommended brass nozzle @255 °C, 30 mm/s, 0.15 mm layers, fan at 10 %.
The author remixed this model.
Quick Remix of the Fan Duct by Sergiienko Valentyn to attach more easily. Moved the attachment point by 0.5 mm in Blender to align the screw holes.