gsgs
Registered User
called a PAPR (powered air purifying respirator). They are most commonly found as a full face respirator. HEPA level filter canisters are in the $40+ range and would be replaced daily ?.
http://www.approvedgasmasks.com/fr2000-scba.htm
Many of these ?advanced? respirators have had availability problems.
$500 is too expensive. I was thinking at a device suitable for mass-usage and a real alternative to masks. The most simple such device would be a snorkel as you can get for a few $ in a swimming/diving shop with a closed tube of N95-material attached to the end of the snorkel-tube.
Then that N95-end-tube should have a screw cap and the snorkel tube should be partly flexible and with screw tab too and you should be able to screw multiple N95 or N100 or UV or heating or whatever intermediate pieces into the snorkel tube. Also maybe a powering intermediate piece to ease breathing, but only as an option. The air could also be sucked in by mechanical hand-pumping or by mechanical energy just transferred from walking. Many possibilities to improve it. Also the snorkel-head-piece can be attached to the mouse, the nose or as a half-mask as in the picture from your link. The low pressure could be preserved through exhaling by some ventil, so the device would also suck and filter when exhaling. Or the exhaled air could be stored in some balloon and reused several times.
But the basic device should just be a small tube with an attached N95-filter worn on your shoulder or back. (IMO) This could be very cheap and leaves much room for intermediate pieces for improvement. E.g. just 2 N95-pieces should be safer and cheaper than one N100-piece.
http://www.approvedgasmasks.com/fr2000-scba.htm
Many of these ?advanced? respirators have had availability problems.
$500 is too expensive. I was thinking at a device suitable for mass-usage and a real alternative to masks. The most simple such device would be a snorkel as you can get for a few $ in a swimming/diving shop with a closed tube of N95-material attached to the end of the snorkel-tube.
Then that N95-end-tube should have a screw cap and the snorkel tube should be partly flexible and with screw tab too and you should be able to screw multiple N95 or N100 or UV or heating or whatever intermediate pieces into the snorkel tube. Also maybe a powering intermediate piece to ease breathing, but only as an option. The air could also be sucked in by mechanical hand-pumping or by mechanical energy just transferred from walking. Many possibilities to improve it. Also the snorkel-head-piece can be attached to the mouse, the nose or as a half-mask as in the picture from your link. The low pressure could be preserved through exhaling by some ventil, so the device would also suck and filter when exhaling. Or the exhaled air could be stored in some balloon and reused several times.
But the basic device should just be a small tube with an attached N95-filter worn on your shoulder or back. (IMO) This could be very cheap and leaves much room for intermediate pieces for improvement. E.g. just 2 N95-pieces should be safer and cheaper than one N100-piece.