Powered rechargeable hepa 13 masks? Where you get those?
“Powered rechargeable hepa 13 masks? Where you get those?“
BROAD AirPro Mask Reusable Air Purifying Respirator with HEPA Filter
by BROAD USA Clean Air
https://www.amazon.com/dp/B086Z2B2F8
Parts, extra masks and filters are available as well.
And they work.
Dad suffers from blood oxy levels less than 90% after 15 minutes
in a normal mask, but he can wear these as long as he has to.
They can be recharged with a power brick while running, too.
~Easy