Noctua NH-L9i duct for 140mm Magnetic dust filter
thingiverse
I share my design to adapt the Noctua NH-L9i fan to a 140mm magnetic filter. Every now and then I had to unplug my server to clean the dust from the heatsink, so I decided to make a duct to place a filter. Additionally, you may need slightly longer screws than the ones the heatsink comes with, and cut out and glue sheet metal or magnets to the duct, so the filter will magnetically attach. It's not perfect, as it fits very tightly and I had to cut a small corner off one of the filters. It looks very nice and professional, as seen in the photo. If you know 3d, you can modify it to solve that little issues y have mentioned.
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