Fume filter for 3D printers

Absorbs nasties when printing ABS.

This is a holder to allow pieces of activated carbon filter foam to be held against the inlet of a small centrifugal blower (BFB0712H). Install inside the enclosure of a 3D printer to absorb microfine particles and VOCs when printing ABS.

This is simply recirculating air within the enclosure, rather than venting outside. Since ABS needs a warm enclosure, this keeps the heat in.

You can attach the whole assembly to the inside of the enclosure with M4 bolts.

I used 2 layers of the following filter foam. The "template" file allows you to easily cut the correct size circles with a hobby knife. When you start to notice an ABS printing smell again, replace the filter pieces.

https://www.aliexpress.com/item/32948431743.html
https://www.aliexpress.com/item/2-Black-activated-carbon-filtration-Foam-Sponge-Air-Filter-Pad-Square-13X13cm-HG5355X2/32811557292.html