A PAPR (powered air purifying respirator) forces air through a filter into a sealed mask to protect workers; here’s a DIY version designed by physician Randell Vallero MD using a 5V computer fan, HEPA filter from a vacuum cleaner, and a full face swim mask.
A PAPR (powered air purifying respirator) forces air through a filter into a sealed mask to protect workers; here’s a DIY version designed by physician Randell Vallero MD using a 5V computer fan, HEPA filter from a vacuum cleaner, and a full face swim mask.