22 North Exhale Port Filter

Very few residents in our high-rise apartment building wear any kind of face covering in the elevators, hallways and common areas. To protect ourselves and others from virus transmission, Gaddy and I wear North RU6500 Full Facepieces with N95 filters. However the RU6500 has no filter on the exhale port, I designed a exhale port disk filter holder to address this. I carefully inspected the sealing surfaces and airflow areas of the existing inhale filter holder geometry to mimic it as much as possible.

North Exhale Port Filter (Prusa Printers)
North Exhale Port Filter (Onshape CAD)