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Real-world data show that filters clean Covid-causing virus from air

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Re: Real-world data show that filters clean Covid-causing virus from air

#171
post #136

Earlier quoted context omitted.

After you read about the Amoy Gardens and SARS1, you will no longer think of it as hyperbolic. https://pubmed.ncbi.nlm.nih.gov/16696450/ >Abstract >Recent investigations into the March 2003 outbreak of SARS in Hong Kong have concluded that environmental factors played an important role in the transmission of the disease. These studies have focused on a particular outbreak event, the rapid spread of SARS throughout Am…

I assume those floor drains lacked a functional p-trap because I've read with covid that disease would spread through drains without a proper p-trap, but otherwise the p-trap prevents drains like toilets and sinks from stinking and allowing contaminated air through. P-traps can dry out though, but they stink if they do. Maybe that's what happened there? Edit: yes, that's the theory - floor drains with dry u-bends all…

It seems to be a problem with older east Asian construction, I claim no specific expertise on the issue but I've observed poor p/u bend water barriers in even fairly nice buildings from the 70s and 80s in Taipei.

Re: Real-world data show that filters clean Covid-causing virus from air

#172
post #170
post #167

Earlier quoted context omitted.

Some of the marches that I went to... were less than airy, to be honest. Easily comparable to any ballgame I have been to. So, I have seen a lot of these papers, but too much feels like post hoc justification. I'm game for being cautious, so I'm not really saying to do anything different, but I do want to urge way more caution in messaging than I'm seeing. It is fair and ok to talk of the uncertainty.

You are free to make your own decisions, but know that the risk is negligible outdoors.

Unless it is an outdoor concert? Or a sports game? Or are we ok with those nowadays?

Re: Real-world data show that filters clean Covid-causing virus from air

#173

Earlier quoted context omitted.

Ending the pandemic is in everyone's interests, as it would help repair the economy. Kids would be included in that as the economy changes how adults are able to care for kids. Kids have been separated from their parents due to increased evictions, their parents may not be able to work which means less money for food/clothing/services/healthcare, their parents & extended family are dying, their education has been imp…

All of these are impacts of lockdowns, not the pandemic.

Without lockdowns and other measures you'd have half million children that lost at least one parent.

Re: Real-world data show that filters clean Covid-causing virus from air

#174
post #83

Earlier quoted context omitted.

Yeah, it's actually pretty complicated. MERV13 also needs less pressure, and a box fan is bad with pressure. If you stuck a HEPA filter on a box fan, it might only do 100cu feet of airflow. MERV13 is maybe 200. HEPA is designed for higher pressure centrifugal fans. MERV13 is likely the best balance for home made designs

There is a cubic design that people have been doing with HEPA filters (4 sides and a cardboard bottom) that solves the airflow issue.

Do you have a source? Sounds interesting.

Re: Real-world data show that filters clean Covid-causing virus from air

#175
post #136

Earlier quoted context omitted.

After you read about the Amoy Gardens and SARS1, you will no longer think of it as hyperbolic. https://pubmed.ncbi.nlm.nih.gov/16696450/ >Abstract >Recent investigations into the March 2003 outbreak of SARS in Hong Kong have concluded that environmental factors played an important role in the transmission of the disease. These studies have focused on a particular outbreak event, the rapid spread of SARS throughout Am…

I assume those floor drains lacked a functional p-trap because I've read with covid that disease would spread through drains without a proper p-trap, but otherwise the p-trap prevents drains like toilets and sinks from stinking and allowing contaminated air through. P-traps can dry out though, but they stink if they do. Maybe that's what happened there? Edit: yes, that's the theory - floor drains with dry u-bends all…

They don’t allow s-traps or u-traps in new US construction, either. I believe that it’s p-traps only.

Hopefully this will help.

Re: Real-world data show that filters clean Covid-causing virus from air

#176
post #174
post #83

Earlier quoted context omitted.

There is a cubic design that people have been doing with HEPA filters (4 sides and a cardboard bottom) that solves the airflow issue.

Do you have a source? Sounds interesting.

https://www.youtube.com/watch?v=Y7eL2OAnqc8
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