Overall a very good idea. I had to divide the print into parts to fit on the Bambu P1S. Additionally, such filters were not available in my country, so I temporarily designed a cartridge with a replaceable filter. I still need to refine everything to increase the suction power despite the 600m/min fan (it's probably due to the pipe being too long or wide - I use 150mm)
Great design, but I would suggest to put a small piece of PTFE tubing (40-50mm) in the bowden coupler for the filament to have a smoother way out of the box. I found that the filament tends to hook/scratch a lot on the teeth inside the coupler thus making a lot of unwanted noise and potentially grabbing the filament and break it of or pull on the entire box. I just keep a piece of PTFE tubing by my printer and only put it in when printing. After I'm done I just take it out and seal the box with the plug again. (edited)