I was concerned with the exhaust while printing most filaments other than the high temp materials. There is no filtering with standard printing.
This is a filter housing that screws into the existing mounting holes on the panel backside.
This uses a standard easy to find Telsa Model 3 Cabin filter. It is a Hepa and activated carbon and comes with a foam gasket around the periphery.
The filter fits snug and is offset toward the center so the larger filter doesnt hang out from one side of the machine.
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This is awesome! I’ll have to try it out, I wonder how restrictive it could be if at all?
I have no real way of checking, but crudely I used a plastic garbage bag and timed to fill it under 100% fan with and without the filter.
It was clumsy but didn’t really show any different times.
It filled a kitchen size in like 8 seconds.
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Crude but effective, all in the name of science 
Nice! Mine printed well just need to wait on the filter.