COVID19 mask -PAPR - with HEPA filter.
thingiverse
I'm using a 60 mm blower with my PAPR setup, combining it with a snorkeling mask, an old Russian gas mask pipe, and a VK130 HEPA vacuum cleaner filter. The project is still ongoing, but I'm aiming to create a welding mask from this design. Currently, the PAPR has no electronic components.
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