Thank you - the air purifier works.
A question:
When recycling the old filter, a carbon appears at the exit of the assembly machine.
But shouldn't the carbon be in the entrance to recycle the old filter?
(Although the coal appears at the exit, it is not actually spent).

Thank you for your work.

Hello again Alexs,

Well, it seems strange to have carbon fiber as an output in recycling recipes !
After all, it's normal for some items to come out of the cleaning processesus because I wanted to reproduce a side where the polluting emissions return to a solid form when the filters are cleaned ! This information is correctly displayed when hovering over the recipes (with percentages if I'm not mistaken).

Also, in my eyes, this makes the process more “difficult”/complex, because otherwise it's too easy to create a closed loop where the pollution disappears completely.

That's a cool idea. Now I saw it: 50% chance of getting coal. Absolutely no problem getting rid of the coal.
Great attention to detail - I'll check out your other mods too. Good job!