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Sphagnum Moss Profile picture
@moss_sphagnum
Jun 17, 2022 • 18 tweets • 14 min read • Read on X
I had a chance to go to this @VSOrchestra Orpheum Theatre built after the Spanish Flu to be *pandemic proof* and WOW. This ventilating system is FULLY OPERATIONAL. Huge crowd 1/n Image
@VSOrchestra And under the seats there were these mushroom shaped objects...Fresh air from pipes provided a very gentle stream of air & note these air intakes were protected by the mushroom design. the stem emitted air, the umbrella part protected it 2/n ImageImage
@VSOrchestra The air rose above the seats to the porous false ceiling above to vent all that air out! This was built in 1927 & it has better ventilation than most modern buildings #PandemicProof architecture 3/n Image
@VSOrchestra This ventilation system is fully operational. I estimated 1700 in that theatre! We need this 100 year old #PandemicProof design that was demanded by the public so wary of death from #SpanishFlu . They were ready for #covid19bc! Are we? ImageImageImage
If there was a way out of our #covid19bc pandemic, here it is, a design from 100 years ago from the people who knew #SpanishFlu was airborne. Here is the article below that made me curious to go to the Orpheum with my aranet4 Image
And a word of caution...so far the CO2 readings are showing great ventilation for 1700 people at <600 ppm and 1200ppm for 3000 people. I would love to gather more data on this! Have a look at Daryl's experience:
So my party took readings at the front, back and balcony. Daryl's balcony seats had 1200ppm around double the reading from yesterday
1200ppm is actually the CO2 levels at my home where I live with 3 other humans & a kitty. This level for 3000 people is still extraordinary but that means full capacity concerts might need a #maskmandate
...CO2 in my house right now with 3 humans inside & a kitty ImageImage
Those #SpanishFluisAirborne floor vents at the #orpheum were designed into many public spaces the 1920s : theatres, lecture halls. urbanremainschicago.com/news-and-event… ImageImageImageImage
"The result of supplying the fresh air at low level and letting buoyancy drive the air through the space creates an improvement in air quality"

google.com/amp/s/blog.pri… ImageImage
...and look what I found! A test of how a #PandemicProof ventilating system designed for #SpanishFlu actually works to use #displacement ventilation to supply fresh air in an old theatre in London! #COVIDisAirborne #covid19bc #orpheum #science
...That Royal Albert is not exactly the same as our #orpheum but it's cool to see this #displacement ventilation at work. It is currently used in modern theatres seeking LEED certification so #EnergyEfficient too #COVIDisAirborne #PandemicProof #covid19bc
" we show that displacement ventilation, ...where air is drawn in through lower-level inlets & extracted at high level, can significantly reduce the spread of airborne contagion, and save the lives of healthcare workers, carers & patient " 1/3 #covid19bc royalsocietypublishing.org/doi/10.1098/rs…
"In mixing ventilation, the occupant is surrounded by mixed air of uniform properties, such as the concentration of a contaminant—a bit like lying in dirty bath water. By contrast..." 2/3
"  in displacement ventilation the occupant is surrounded by newly arrived air, and pollutants generated near or by the person are lifted towards the ceiling by the rising warm air—rather like being in an inverted shower and rinsed with clean water. " 3/4
...from the same paper, an illustration of how displacement ventilation can be used in healthcare 4/4 Image
Looks like the New Orleans #Orpheum , built around the same time uses displacement ventilation too! m.facebook.com/orpheumnola/po…

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More from @moss_sphagnum

Sphagnum Moss Profile picture
Feb 18
" In May 2017 a patient attended the emergency dept at a hospital in England, with a presumed allergic reaction. He was subsequently diagnosed with #Measles . There were 7 further confirmed cases, five of whom had received two doses of #MMR vaccine." 1/
sciencedirect.com/science/articl…
"a 25 year old male...presented with a 1 day history of a rash on his face with accompanying facial pain, diarrhoea and epigastric tenderness. He was found to be lymphopenic. He
had visited his...physician the day before feeling generally unwell and with a facial rash." 2/
"The rash was first noticed after he had taken ...medicine containing paracetamol, promethazine Hydrochloride, &dextromethorphan hydrobromide, for symptom relief the day before. A presumed allergic reaction was diagnosed, for which he was prescribed prednisolone " 3/
Read 13 tweets
Sphagnum Moss Profile picture
Jan 2
Why do mask mandates matter? Because source control matters! Check out this research 1/
" All masks and respirators significantly reduced exhaled viral load, *without fit tests or training* . A duckbill N95 reduced exhaled viral load by 98% ..."
..." We compared efficacy of masks (cloth &surgical) &respirators (KN95 &N95)as source control for SARS-CoV-2 viral load in exhaled breath of volunteers with COVID19. Volunteers provided paired unmasked and masked breath samples allowing computation of source-control factors" /2
"Findings: All masks and respirators significantly reduced exhaled viral load, without fit tests or training. A duckbill N95 reduced exhaled viral load by 98% &significantly outperformed a KN95 as well as cloth and surgical masks" /3
Read 5 tweets
Sphagnum Moss Profile picture
May 25, 2023
All BC #workers have the right to
1. know what hazards exist in the workplace.
2. report injury or illness from hazards
3. refuse unsafe work
4. be free from reprisal for refusing unsafe work

#SARSCoV2 is a BSL3 pathogen & we have a right to know if it is in the air
...Govts are trying to spread a hazard so widely that workers cannot say that there is more hazard at work than elsewhere.

But if you slipped & fell at work, your slipping at the ice rink does not remove your employer's responsibility to remove a work hazard #SARSCoV2
...and if it is so easy for them to trample on a worker's right to *know* that a hazard is present,then watch out! They will make other looming hazards *endemic* too:

#wildfire smoke? You inhaled that at the gym!!
#heatstroke? Why it is hot everywhere!

#ClimateEmergency
Read 5 tweets
Sphagnum Moss Profile picture
Feb 19, 2023
A @WorkSafeBC #covid19bc claim must demonstrate higher exposure at work vs daily life so you must list exposures from: gym, worship, friends &family. Effectively, by removing #maskmandate , #PHO has undermined *every* WS claim unless we forego ALL socials outside of work 1/
@WorkSafeBC ....Effectively a claim can be denied due to Public health removing public protections &workers who have ANY social life, who does not receive *meds* (paxlovid? few workers eligible) & who does not personally mask up consistently...oh AND family members 2/
@WorkSafeBC But note, this claim form is also telling us that sports, gyms & workplaces where non household people gather socially ( where? like restaurants? pubs?) are full of #covid19bc & you,the worker must show that you take precautions in that social realm ...reposting image 3/ worksafe screening questionnaire from https://www.worksafe
Read 16 tweets
Sphagnum Moss Profile picture
Feb 12, 2023
CDC rewrites history on the #Spanishflu :

"With no vaccine to protect against #flu infection and no antibiotics to treat 2ndary bacterial infections that can be associated with influenza infections, control efforts worldwide were limited to NPIs ..." 1/
" ...isolation, quarantine, good personal hygiene, use of disinfectants, and limitations of public gatherings" That's very odd, there is no mention of the widespread use of #ventilation during the #SpanishFlu era
This is a curious omission since ...cdc.gov/flu/pandemic-r… 2/
....During & after the #Spanishflu , extraordinary efforts were made to design excellent ventilation in all public spaces including vaudeville halls 3/
Read 6 tweets
Sphagnum Moss Profile picture
Sep 17, 2022
#bced Pro-D. The chair gave me time to explain what this thing was , humming in the middle of our circle of 27 mostly unmasked teachers. I said it was a #science project. We had #wildfires which gave us choking smoke....1/ #covid19bc #CorsiRosenthalBox
...It was built by the #science class. I shared that the #CorsiRosenthalBox can breath in >1000x more air than our lungs so any wildfire smoke, pollution or airborne diseases like flu, or covid is more likely to be caught here before we breathe it in! #bced After I presented 2/
after I presented, a teacher took a pic of it & asked me how to make it. I promised her a link to how to make a #CorsiRosenthalBox so she could make one with her child. Next, the humanities teacher borrowed the #science dept CO2 monitor , &the math teacher borrowed my monitor 3/ aranet4 showing 566ppm
Read 5 tweets

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