A Nevermore Mini is the best DIY 3D Printer air scrubber for its size, achieving 5x the airflow compared to other popular solutions at a similar footprint, more filtration media space (150-450 grams of carbon depending on size) and HEPA filtration. This wont leave parts of your build chamber unfiltered.
Video features a basic Nevermore Mini instruction build, using a 5020 fan and no internal electronics (also available with touch screen and VOC sensors for automatic filtration control).
printables.com/model/757663-nevermore-mini-3d-printer-hepa-and-carbon-air-filt
