HEPA filter box

This is a box I built for my IKEA Lack enclosure v1. It can probably work for many other applications.

What you need:

1x HEPA filter 140 x 110 mm (inner dimensions)

1x Piece of active carbon filter 140 x 110 mm

1x Fan 120 x 120 mm (5v if you want to connect it to Raspberry Pi USB)

4x Screws + nuts