Qidi Q2 Custom Fan Duct

Stock cooling duct on the Q2 is very imbalanced and the left side suffers from poor cooling as a result. I designed this duct and fan mount to correct that and simultaneously improve the cooling performance. It is drastically better. It is also a lot lighter which should improve your input shaper results and printer performance. STEP file is provided so feel free to adjust or make edits.

Change-Log

2025-11-19: I've adjusted the duct to have clearance around the hotend as V1 was interfering with it. Additionally I've added built-in supports so that the model prints at a 45 degree angle which is better for overall internal geometry. You will still need to enable supports to support the area which bridges the two halves of the outlet ducts.

BOM

• M3x20mm x 2
• M3 hex nuts or similar

Printing

Use ABS/ASA or similar temperature resistant materials to print. I've provided a .3mf file which has all the supports required already painted.

Assembly

Print one fan mount and duct and two spacers. Use 20mm M3 screws which are secured by M3 hex nuts or similar. The one shown below is an earlier version which did not have the cutout for the cable. The provided one does.

Important notes

The stock fan is bad. Although the duct itself is drastically better than the stock one, it will not overcome the limitations of a bad fan as that is what's responsible for moving the air. I would highly recommend an aftermarket fan from GDSTime or honey badger that is wide outlet if you want even more cooling. I primarily print ASA and similar materials so the stock fan is sufficient. You can see the images with the overhang test, that is done with the stock fan.