Filtering the expired air by the patient in order to reduce the surrounding contamination.

[marcos-mendez]

What type of filter can we use? According to information from Paper MIT that we researched, the limit would be one micron, but it is necessary to find a cheap and reliable material that can be used in these sanitary conditions in order to allow the equipment to be safe for people around the patient in order to that the appliance does not contaminate further

[wahingt2n]

i found this online, can we use something like this water filter, contained in a 3d printed housing? https://www.amazon.com/-/es/filtro-155384-bp-420-polipropileno-Micron/dp/B0067GPSP8/ref=sr_1_2?dchild=1&keywords=1%2Bmicron%2Bfilter&qid=1584737103&sr=8-2&th=1

[marcos-mendez]

Here is some documentation about HEPA filters and how it can provide 0.5um micras (recomended is 1) as a cheap solution. Also ultra violet light could kill virus and bacteria

https://pt.wikipedia.org/wiki/Filtro_HEPA

[marcos-mendez]

Here is some documentation about HEPA filters and how it can provide 0.5um micras (recomended is 1) as a cheap solution. Also ultra violet light could kill virus and bacteria

https://pt.wikipedia.org/wiki/Filtro_HEPA

Notice the Biomedical Aplication section

[wahingt2n]

do you know witch one is the correct ?

classe HEPA retenção (total) retenção (local) E10 > 85% --- E11 > 95% --- E12 > 99.5% --- H13 > 99.95% > 99.75% H14 > 99.995% > 99.975% U15 > 99.9995% > 99.9975% U16 > 99.99995% > 99.99975% U17 > 99.999995% > 99.9999%

[marcos-mendez]

Based on this documents https://www.cdc.gov/coronavirus/2019-ncov/hcp/respirator-use-faq.html and also this document i imagine that N95 is the Medical Standard

[wahingt2n]

if i understood this right, it means that e11 inclusive and above, that´s right?

[marcos-mendez]

Yes but for safety reasons i would choose the E12 one

[marcos-mendez]

Please also notice this documentation https://docs.google.com/document/d/1-71FJTmI1Q1kjSDLP0EegMERjg_0kk_7UfaRE4r66Mg/edit?fbclid=IwAR21RNqzjq14fV_DypWk8haaHxGCY7a0ApF_DSOaKR609yoj6T3pLI9oJ80

[brancante]

What about a different approach? This Coronavirus is very sensitive to temperatures above 26 degrees Celsius, so heating the exhaust maybe could do the trick. We could try using a Mica heating band. It is very inexpensive and reliable.

[marcos-mendez]

It is not 26 it is 60 degrees and a heating solution would consume to much energy

Em qui., 26 de mar. de 2020 às 22:13, brancante notifications@github.com escreveu:

What about a different approach? This Coronavirus is very sensitive to temperatures above 26 degrees Celsius, so heating the exhaust maybe could do the trick. We could try using a Mica heating band. It is very inexpensive and reliable.

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