I needed a way to safely vent the fumes from my enclosure and realised that my old air purifier would be perfect as it has both a HEPA filter and an active carbon filter.
This set replaces the bottom cover for the air purifier with a conical adapter that goes down to a standard air pipe (95mm-ish inner diameter) and comes with a stand to prop the air filter up with.
This was made for the Levoit LV-H132 air purifier however it might fit others that have a diameter of 200mm (or smaller if you have enough duct tape to cover the gap)
With the adapter and the pipe sealed up, I managed to get a strong flow even on the lowest setting which is promising.
(Make sure you remove the base before installing the adapter)
The adapter is 206mmx206mmx96mm so it should fit any Ender 3 / similar in one piece.
I wouldn't recommend buying an air purifier specifically for this as it's not worth the price just to filter an enclosure's air, I made these parts as I already had the purifier on hand and it was not being used.
The author marked this model as their own original creation.