Prusa i3 Mk2S print fan duct/nozzle

thingiverse

A duct fan that expels air from both sides and the front. The arms directing airflow outward are designed with curvaceous lines and internal ribs to optimize airflow, though no computational fluid dynamics analysis has been conducted to validate this design. Intended for printing upright with the screw attachment facing downwards. The uploaded model features additional vertical supports beneath the arms to prevent sagging or overhang, as these thin surfaces act as bridges during printing, requiring no slicer-generated support. After printing, the removable support columns can be easily excised with a knife. This design has been fabricated using PLA material at 0.15mm layer height by the creator. The openings in this design are based on measurements taken from a component uploaded to the Prusa forums by PJR. Version 4 of this duct fan boasts a more print-friendly underside, featuring a flat surface that remains in contact with the print bed until it reaches a 45-degree angle. This iteration also incorporates 12mm wide arms, rather than the original 10mm width, allowing for clearance around the P.I.N.D.A probe and repositioning of the outlets to accommodate a silicone sock without hindrance. The wider arms may slightly reduce air speed at the outlet, yet airflow remains relatively high.