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#ASHRAE has released draft guidelines for how to reduce the spread of #airborne infectious illness (like COV1D) in schools, hospitals, and other places.

It's open for public comment until May 26. This thread will give you background info and how to comment.
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Joey Fox linked to the #ASHRAE indoor air cleaning draft guidance and also provided a helpful summary thread.

https://twitter.com/joeyfox85/status/1657020668406378498

I found this #ASHRAE air cleaning guideline summary page particularly helpful.

https://twitter.com/joeyfox85/status/1657020677352726535

Read 7 tweets

NALTIC Industrials, LLC

@nalticx

Mr. Nick Rice @ihrice w/@Intermountain presented a powerful, under recognized presentation in #Utah on #IAQ

& 100% in line with @linseymarr @CorsIAQ @JimRosenthal4 @WBahnfleth 👉#SARS_CoV_2.

Entire #SLC #IAQ Summit: #UTed

A few clips in this 🧵follow:

👆2/n Start with #MERV13

(In the Q&A at the end of the full presentation we learn that @slcschools has now fully implemented #MERV13 filters in all schools.)

@SaltLakeHealth #UTed

https://twitter.com/nalticx/status/1599840267770609664

3/n More on #MERV13

Keep the fan on 24/7 (Do Not USE "Auto") on your HVAC.

Change filters more often.

https://twitter.com/nalticx/status/1599848495787442177

Read 8 tweets

Stefan Simon 🇪🇺🇺🇸 @318 ppm CO2

@mcsts

Was bedeutet #Alarmstufe des #Notfallplan Gas für Museen, Bibliotheken und Archive? Endlich Erkenntnisse von Forschung und Wissenschaft in ihren Betrieb übernehmen! 🧵 1/18 @VDR_Bonn @ICOMDeutschland @museumsbund @BundesKultur @BMWK @Erhard_Grundl @dpwes bundesregierung.de/breg-de/suche/…

Hintergrund: Museen zählen flächenbezogen zu den grössten Energieverbrauchern im urbanen Umfeld. Verbräuche von über 300 kWh/m2a sind normal. Neubauten wie das derzeit im Bau befindliche Museum des 20.Jhdts in Berlin werden deutlich mehr Energie verbrauchen. 2/18

Verantwortlich dafür sind die Feuchte- und Temperaturkorridore der Klimaanlagen, die sich am technisch Möglichen und nicht am konservatorisch Notwendigen ausrichten und seit Jahrzehnten nicht mehr den Stand der Wissenschaft entsprechen 3/18

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(🦠🎓👶) -(😷💉💨)=😱💔🤮☠️

@jhengstler

@prof_nch (1/?) Profs thinking it’s ok to exercise privilege & unmask to teach in indoor classroom of students who must attend or possibly fail class—either have COMPLETELY NO understanding that 1)#aerosol is main transmission route for #COVID19; 2) how aerosol transmission actually works;

@prof_nch (2/?) 3) #Delta is hypertransmissible with rate of 1 infecting on avg 5-7 more vs earlier strains 2-3 more; 4) most infected don’t know they’re infected when they are at their most infectious because symptoms only show after peak infectiousness—if ppl not asymptomatic; …

@prof_nch (3/?) most have no real functional understanding of indoor air quality in own classrooms & rely solely on air system filtration—don’t monitor it with CO2 meters, keep windows/doors open; 4) don’t think about minimal acceptable air quality vs ‘good/excellent’ by #ASHRAE standard;

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Omydes Group

@Omydes_UVC

🙋 Hola, queremos aportar nuestro granito de arena y facilitar información sobre preguntas F.A.Q. sobre la #LuzUltravioleta #UVC #RadiacionUltravioleta 💜 #Climatizacion #Aerosoles

¡Dentro Hilo! 🔽 (1/22)

(2/22). ¿Qué es la Luz Ultravioleta?

Dentro del espectro electromagnético, en la
zona no visible, encontramos las longitudes de onda
comprendidas entre los 10 y los 400 nanómetros, donde encontramos la luz #UVA,
#UVB y la #UVC

(3/22) ¿Por qué la UVC es tan especial?

La #UVC se sitúa en el rango de longitudes de onda entre 100 nm y 280 nm. Dentro de este rango UVC, la región situada 220 nm–280 nm se considera #germicida o #GUV por sus siglas en inglés (Germicidal UV)

Read 23 tweets