For doing on-prem development
PAPR EM (Powered Air Purifier Respirator)
around the Versaflow TR-300 and M-207 or M-305 Helmet
CDC guidance on Niosh - https://www.cdc.gov/niosh/npptl/topics/respirators/disp_part/respsource1quest2.html
PAPRs use HE (99% up from N95 95%) or HE/Niosh filters
Air hose chart - https://ecat.eleknet.com/PIM_Docs/Docs/STEP_ASSETS_PDF/14393103.pdf
3M Versaflow PAPR
<blockquote class="twitter-tweet"><p lang="en" dir="ltr">How to obtain a 3M Powered Air Purifying Respirator (PAPR + N95) if you absolutely are required to enter a building over the next year.<a href="https://t.co/vyWg2gYRcW">https://t.co/vyWg2gYRcW</a> <a href="https://t.co/Sa0wyXYoOV">pic.twitter.com/Sa0wyXYoOV</a></p>— <a href="https://twitter.com/_mikeobrien/status/1320439042266247169?ref_src=twsrc%5Etfw">October 25, 2020</a></blockquote> <script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script>
|3M TR-300 with M-207 Helmet||3M TR-600 with M-307 Helmet|
|Wearing an n95 inside the helmet||Yes, you need a mask for when you may need to lift the face seal and also as a backup in the case you need to sneeze.|
Don't worry about the poly faceseal gap on the mask straps around your ears - there is enough positive air pressure when you pull open to test the seal with your fingers that a wind is evident going out the sides of the mask.
during normal operation the blower forces air from the top front of the head across the face and back out up through the back of the head - as by design the helmets have no seal across the top of the head - to allow for this airflow.
|Will filter virus particles||Researching - but several studies available on bringing these into healthcare settings and ICU's support the fact that most of the high end filters (especially for TR-600) will filter micron scale particles - the half life of the filter is 40h though|
Without the full head we get 25 not 1000 protection - which is better than an ill fitted n-95 mask.
thing of this unit in addition to the n-95
|winter operation||wear the unit facing front - just under your jacket|