90mm CPU Fan Duct for Fractal Design Node 202

Fan duct for the CPU fan mounted in a Fractal Design Node 202 case.

It allows the fan to pull cold air from outside the case as opposed to recirculating hot air inside.

When installed, it reduced my idle temperatures by about 5°C–10°C. This makes a big difference for me, because the Node 202 houses my 24/7 server which is in the same room as my bed, so minimising fan noise is imperative to me.

The dimensions are meant to be compatible with Noctua NH-L9i CPU cooler.
Originally I designed it with little clips that would ratchet into the Noctua NF-A9x14 PWM fan that comes with the cooler.
Unfortunately, I built it assuming the fan body is 90mm wide, but it is actually 92mm wide.
After cutting off the clips I could force it to go around the fan and it functions well enough as a friction fit.
I have uploaded both a file with and without those clips.

Printing settings used:

• ASA with an enclosure (270°C nozzle, 100°C hotbed, ≤50°C chamber)

• 15% rectlinear infill

• Supports only for the clips but not for the main body

• 10mm wide brim (inner and outer) + glue stick

• 2 wall loops

• Default speed

• 0.2mm layer height

You could also use ABS or PETG but my ASA was already loaded into the printer and there aren't any significant differences between these types of filaments that would be relevant to this fan duct. However, using other filaments might make it less likely for the print to lift off the build plate (this is the reason I had to add the brim and glue when trying again).

A similar model I made for use with a graphics card in the Fractal Design Node 202: