This is an improvement on my N95 Mask Using CPR Pocket Face Mask and Air Purifier HEPA Filter design. Compared to that design: Breathability is greatly improved by increasing the surface area of the airflow through the filter medium. With a larger diameter canister (pill bottle), lower efficiency filter media (higher resistance to breathing)…
WARNING: HEPA filters often contain fibreglass, which can cause lung damage and skin irritation. You should make sure that the fibreglass fibres from the filter media harvested from HVAC filters has been contained to your satisfaction. I have had it suggested that one should hot glue the edges or use a food-safe epoxy and to…
The below video features a relatively comfortable, re-usable N95 (or higher) mask that can be constructed easily in minutes using “disposable” materials on hand in most hospitals. The video also includes a simple decontamination protocol, but I would be very careful to ensure that you do not apply alcohol to the filter media, as…
Real-Life Viability Status: Half-baked Polypropylene (reusable shopping bag) surgical masks and possible DIY enhancements to filtering ability such as hydrocharging UPDATE #2: The middle layer of commercial surgical masks is made of webs of non-woven polypropylene, the same material used to make the vegetable cover cloth used by vegetable farmers to protect plants from frost…