carbon pellets box for line filter

For the line filter I wanted to use carbon charcoal pellets. This filter box keeps thosepellets inside and in place. I used pellets with 4mm diameter.

The original design is great, just not for pellets. It falls apart if you disassemble the line filter, makin quite a mess - see picture. Also the pellets fall through the mesh holder.

The lid fits all sizes

There are different sizes, the size defines the free space inside for the carbon pellets

With pellets alone the size of 20-25 mm seems to work ok for me. This all depens on your type of fan of course.

It is also possible to add a carbon mesh filter, then you could use a larger size.

Print the lid and the box of your liking.