HEPA filter with easy access to change the filter
Carefully drill the 1mm hole to 3mm for the hinge (fan case) Carefully drill the 1mm hole to 2.5mm and cut an M3 thread into it
Required material:
Filter: https://www.aliexpress.com/item/32788652288.html
Carbon Pad: https://www.amazon.com/EA-Premium-Carbon-Infused-Filter/dp/B07T3PPH4C
9x M3x4mm heat inserts
8x M3x16 countersunk flat head for the fans
1x M3x10 countersunk flat head as door lock
2x M3x20 BHCS as hinge
