Fan turning vanes

thingiverse

This is a fan grate with turning vanes that I designed out of necessity. The fan that I put on the side of my Prusa enclosure was blowing slightly across the build plate. This part is astonishingly effective at turning the airflow down to the bottom of the enclosure. Note that I'm using an old fan from an air hockey table which provides airflow with less divergence, so results with a more common axial fan may not be as good.