Prusa MK3 R3 Taller Print Fan Ducts

thingiverse

I recently acquired a tungsten nozzle from Midwest Tungsten for my MK3 and noticed that it is significantly longer than the E3D stock nozzle. Consequently, the part cooling fan blows air directly onto the nozzle, which can negatively impact thermal performance. To rectify this situation, I redesigned the stock setup into two simple fan ducts, one 3mm taller and the other 2mm taller. The design shown in the images features the 3mm extension, but users may prefer the 2mm option if it appears too close to the bed. Two minor modifications were made to the design: an extended attachment hole for the fan was added to minimize air gaps, and the ceiling of the duct was reinforced with additional layers to prevent holes from forming, a common issue with the original design.