These 3D-printed parts can make an old, inadequate respirator safe for use in a high-contact, high-exposure setting using a commonly available item as filtration media.
Alternatively, should a limited supply of n95 masks be available, this system could stretch the supply substantially. By cutting up the donor mask, theoretically, the material from one mask could be used to protect as many as eight people.
Files have been updated; now these cartridges are compatible with disposable 3M respirators, standard 3M respirators AND standard MSA respirators.
Mask used: 3M 5201 Disposable Half Face Respirator
Filtration medium used: Cotton Rounds
I have made these parts open source and they are available for free download at grabcad.com and thingiverse right now.
