Nice post about cleaner indoor air standards - CLL Support

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Nice post about cleaner indoor air standards

Classicaljazz profile image
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The Gauntlet

Billionaires at Davos don't think COVID is a cold

A few weeks ago, the New York Times called mask-wearers "the last holdouts". This week, the world's richest people went to great lengths to protect themselves from COVID

Julia Doubleday

19 hr ago

In photos of 2023’s World Economic Forum- or Davos as it is commonly called, after the Swiss resort town where it annually occurs- you might not notice the HEPA filters. They’re in the background, unobtrusive and unremarked upon, quietly cleansing the air of viruses and bacteria. You wouldn’t know- not unless you asked- that every attendee was PCR tested before entering the forum, or that in the case of a positive test, access was automatically, electronically, revoked. And if you happened to get a glimpse of the strange blue lights overhead, you could reasonably assume that their glow was simply a modern aesthetic choice, not the calming buzz of cutting edge Far UVC technology- demonstrated to kill microbes in the air.

It’s hard to square this information with the public narrative about COVID, isn’t it? President Biden has called the pandemic “over”. The New York Times recently claimed that “the risk of Covid is similar to that of the flu” in an article about “hold outs” that are annoyingly refusing to accept continual reinfection as their “new normal”. Yet, this week the richest people in the world are taking common sense, easy- but strict- precautions to ensure they don’t catch Covid-19 at Davos.

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These common sense, easy precautions include high-quality ventiliation, use of Far UVC-lighting technology, and PCR testing. You’ll also see some masks at Davos, but generally, the testing + air filtration protocol seems to be effective at preventing the kind of super-spreader events most of us are now accustomed to attending.

It seems unlikely to me that a New York Times reporter will follow the super-rich around like David Attenborough on safari, the way one of their employees did when they profiled middle-class maskers last month. I doubt they will write “family members and friends can get a little exasperated by the hyper-concern” about the assembled Prime Ministers, Presidents and CEOs in Switzerland. After all, these are important people. The kind of people who merit high-quality ventilation. The kind of people who deserve accurate tests.

Why is the media so hellbent on portraying simple, scientifically proven measures like high-quality ventilation as ridiculous and unnecessary as hundreds of people continue to die daily here in the US?

Why is the public accepting a “new normal” where we are expected to get infected over and over and over again, at work events with zero precautions, on airplanes with no masks, and at social dinners trying to approximate our 2019 normal?

We deserve better. We deserve to be #DavosSafe as the hashtag going around on twitter puts it. Your children deserve to be treated with the care that world leaders are treating each other. Your family deserves to be protected from the disease which is still- unlike the flu- the third leading cause of death in the US. We don’t deserve to be shoved back into poorly ventilated workplaces while our politicians and press assure us that only crazy people would demand to breathe clean air.

Clean water and clean food are rights we fought for; we have regulatory bodies that ensure we aren’t exposed to pathogens via our water supply nor our food. In 1854, John Snow famously conducted his Broad Street Pump study in London and demonstrated that cholera was water-bourne; however, it took decades for our public policy to catch up with our scientific knowledge.

A public health case study published by the NBCI describes the years that followed:

The first use of chlorine as a disinfectant for water facilities was in 1897 in England. The first use of this method for municipal water facilities in the United States was in Jersey City, New Jersey, and Chicago, Illinois, in 1915. Other cities followed and the use of chlorination as standard treatment for water disinfection rapidly grew. During the 20th century, death rates from waterborne diseases decreased significantly, and although other additional factors contributed to the general improvements in health (such as sanitation, improved quality of life, and nutrition), the improvement of water quality was, without doubt, a major reason.

Forty-three years passed from the initial demonstration that pathogens were being spread via water, and public action and regulation to halt disease.

Can you imagine, in the 1890s, being somebody who argued against cleaning the water?

Can you imagine, in those years of plentiful cholera, calling the people who demanded shit-free water “hold outs”?

One thing COVID realists are accused of is being “doomsayers” and “fearmongers,” so let me share a dose of optimism about the future with you. When we choose- whenever we choose- to get COVID under control, there’s an exciting new world awaiting us. One, not only without constant COVID reinfection, but where our kids can grow up free of colds, flus, RSV, and many other common bugs. And no, contrary to what you may have heard, staying healthy (shockingly enough) is not bad for children!

Once we choose to institute ventilation standards and introduce new technologies like Far UVC lighting- and embrace masking as an easy, kind, and useful tool to control outbreaks- we can bring every nasty airborne pathogen under control the way we did cholera. We didn’t have the science before; now we do. (I mean that quite literally; I can’t recommend enough the linked Wired article cataloguing the long journey to establishing that Covid is, indeed, airborne).

We face a stark choice; down one road, the one with zero infrastructure upgrades, no air quality regulations, and Covid safety only for those who can afford it, you and your family will get Covid this year. You will get Covid next year. You will continue to get Covid over and over and over again, as the health problems - like cardiac damage, viral persistance, and immune system dysfunction- continue to build up. (The billionaires, of course, will not).

Down the other road, we quite simply treat ourselves the way Davos would. We engage with what the science is telling us and we build a safer, better world for our kids. We embrace the lessons this pandemic is teaching us, and let go of things we now know are harming people. We stop clinging desperately to the idea that 2019 will come back if we just get the virus one more time, and we come together to achieve what we’ve been told is impossible: elimination.

The economic elite thrive on our divisiveness and blame casting. They don’t mind that we’re calling each other names, engaging in racial stereotyping, or leaving disabled people to die, so long as we keep their machine running. But we can choose to stop throwing blame at each other, and direct it where it belongs: at the powerful people who’ve left us to suffer, at the politicians who are whipping people into a frenzy over masks instead of over our millions of dead, at the talking heads on TV that work so hard to convince us: you want to get sick. It’s better than being a *weirdo* or a *hold out*.

We needn’t wait 43 years to redirect our energies. France and Belgium have already introduced new air quality standards, and DIY projects to build Corsi-Rosenthal boxes for schools and healthcare settings have popped up around the country. We have the science, we have the technology. All we need now is the political will and the solidarity to truly end the pandemic- the kind of solidarity the super rich always show with one another.

The billionaires at Davos don’t accept continual Covid reinfection. They demand better. It’s time we demand better too.

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Classicaljazz
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Classicaljazz profile image
Classicaljazz

Not just for viruses, but to keep a house/indoor area safer from wildfire smoke, from volcanic vog, or allergic triggers:

Corsi-Rosenthal Box filter "units can be assembled in around fifteen minutes, last for months, and cost between US$50 and $150 in materials."

en.m.wikipedia.org/wiki/Cor...

Background and history

Design

Instructions for making the box using materials available at North American hardware stores

The original Corsi–Rosenthal Box design consisted of five furnace filters, preferably of effectiveness MERV13 or higher, which formed the sides and bottom of a cube.[13] A 20-inch (500 mm) box fan is placed on top and duct taped to the filters, sealing the system so that air is drawn through the filters, up and out of the box.[16][10] An updated design, also known as a Comparetto Cube,[18] uses four filters and a cardboard base that can sit directly on the floor.[19] Rosenthal later improved the design further by adding shrouds made of cardboard or similar materials to cover the corners of the box fan to improve efficiency and reduce backflow.[20][21]

The filtration units can be assembled in around fifteen minutes, last for months, and cost between US$50 and $150 in materials.[16][10][9]

Efficacy

Airborne virus particulates range in size from 1 to 50 microns (μm). Rosenthal used his HVAC company's testing equipment to run an informal test of the design, in which he found that around 60% of 1 μm particles were removed by the system, and almost 90% of 10 μm particles were removed.[9] Clean air delivery rates (CADR) of a US$75 design were estimated at between 165 and 239 (depending on fan speed) in an August 2021 case study by UC Davis researchers.[20] In October 2021, Corsi told GBH News that "People are now reporting 600 cubic feet per minute (280 L/s) in clean air delivery rates. That's phenomenal. That's actually better than a lot of the more expensive HEPA-based portable air cleaners".[10]

In April 2022, a team based at UC Davis published a study of a Corsi–Rosenthal box that used five 2-inch MERV-13 filters. They found that this design's "effective clean air delivery rate [CADR] increase[d] with fan speed, from about 600 to 850 ft3 min−1 (1019 to 1444 m3 h−1)".[22] Based on the cost of their design, this output amounted to $0.08 per CADR, or roughly ten times cheaper than commercial air purifiers, with quieter operation.[22]

A study of a home-built air purifier to remove wildfire smoke, using a box fan and filter mounted in a window, showed that particulate matter between 1 and 10 μm in size was reduced by about 75%. Wired wrote that this study may be suggestive of the efficacy of similar filters to filter virus particles similar in size to the particles studied.[9][23]

CLLerinOz profile image
CLLerinOzAdministratorVolunteer in reply to Classicaljazz

The DIY units are great but, for those who want a ready-made, commercially produced air filter, an online tool provided by Clean Air Stars can help with the selection.

In addition to helping with brand/model availability, it recommends the number of units you would need to adequately filter the air in your sized space, depending on the running speed you want to use and the noise level you could tolerate.

It includes both commercial and DIY air filters so you can also use it to determine how many DIY air filters you might need, depending on the size of the space that you want to filter.

You can set the search criteria for particular countries and only models available in that region will be included in the search results. I think its database is updated pretty regularly.

cleanairstars.com/filters/

bennevisplace profile image
bennevisplace in reply to Classicaljazz

Probably applicable to misuse, but words of caution from fda.gov/radiation-emitting-...

Q: What are the risks of exposure to UVC radiation?

A: UVC radiation can cause severe burns of the skin and eye injuries (photokeratitis).

Q: What are the risks associated with using some UVC lamps?

A: Some UVC lamps emit small amounts of UVB radiation. Therefore, exposure to a high dose or prolonged low dose of radiation from some UVC lamps can potentially contribute to effects like cataracts or skin cancer that are caused by cumulative exposure to UVB radiation.

Kwenda profile image
Kwenda

The almost total lack of any science background amongst our politicians makes it difficult for them to understand these matters..

Also the standard of installed air-conditioning in large buildings and even hospitals is frequently very poor.

Dick

(Retired A/C engineer)

Atds profile image
Atds

wish I were reading this post in the New York Times

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