exhaust system for 3d printer

exhaust system (made for 3d printer) with
- hepa filter adapter (https://www.amazon.fr/dp/B01N4K9B9P)
- room for activated carbon filter
- 120 -> 100mm pipe out (can be coupled with https://www.thingiverse.com/thing:4238912 to be complete ^^)
and a 120 mm fan grid

With all those filters, fan out flow will be relatively low (which is what we want to print ABS)
Fan grids can be printed in tpu95 to make low cost seals between filters (blue parts on photo)