I've been working on a Powered Air Purifying Respirator at https://airtoall.org/products/papr/ https://airtoall.org/products/papr/. Our goal is to release a che

I've been working on a Powered Air Purifying Respirator at https://airtoall.org/products/papr/ https://airtoall.org/products/papr/. Our goal is to release a cheap (you can't get certified if you don't sell it) and open device that is niosh certified and thus usable. Currently working on our manufacturing prototype.