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Installing air filters in classrooms has surprisingly large educational benefits (2020)

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21–30 of 148 posts

Re: Installing air filters in classrooms has surprisingly large educational benefits (2020)

#21

Only marginally relevant, this is one reason I use swamp coolers in my home. My windows are open 24/7, 4 months of the year. I hear the birds in the morning and it’s so much more pleasant than shutting in an air conditioned box, in my opinion

Does the humidity not cause problems? What is the relative humidity in your home?

I'd guess somewhere dry. Swamp coolers don't really work in humid climates.

Re: Installing air filters in classrooms has surprisingly large educational benefits (2020)

#22
post #10
post #9

I'm all for installing air filters in classrooms for a number of reasons, but I also think the extreme results from this study aren't going to hold up to further research. From the paper: > To do so, I leverage a unique setting arising from the largest gas leak in United States history, whereby the offending gas company installed air filters in every classroom, office and common area for all schools within five miles…

If anything, schools able to implement air filtration and fresh air exchanges systems are likely those flush with cash and supportive parents.

in this case the filtration systems were installed on the dime of a local natural gas company after a leak, although that was as a result of the interference of interested parents

Re: Installing air filters in classrooms has surprisingly large educational benefits (2020)

#23

Also, turns out preventing kids from getting sick improves educational outcomes.

My dad made a similar observation, assuming the children were young. However, upon reviewing the article, I noticed it doesn’t explicitly mention the grade level. Considering younger children have weaker immune systems, this could potentially lead to fewer missed classes and improved grades. Personally, my first grader misses out on a considerable number of classes. However, if these results were observed in grades 3…

But then, what about being protected from sickness from a young age, to end up sick all the time as an adult ? You had a better education, we can agree, but your body got weaker as a result and now you can't be as productive as an adult.

I exaggerate a bit, but I found that during covid, where the mask was mandatory in my place, I was never sick. The only few years in my life where I was actually healthy continuously for YEARS, I and my friends could not believe the impact of the mask. But then we were stuck at home, living in constant misery and stress.

Once the masks disappeared, finally we could live again, and got extremely sick the first few years... Maybe a more normal balance would have been better ? Sick a bit continuously ? I think trying to avoid sickness is like trying to swim against the current, nature just works that way.

Re: Installing air filters in classrooms has surprisingly large educational benefits (2020)

#24

Only marginally relevant, this is one reason I use swamp coolers in my home. My windows are open 24/7, 4 months of the year. I hear the birds in the morning and it’s so much more pleasant than shutting in an air conditioned box, in my opinion

Do you not get massive amounts of dust?

Re: Installing air filters in classrooms has surprisingly large educational benefits (2020)

#25
post #6

Someone writes whether the data actually shows what it purports to show: https://statmodeling.stat.columbia.edu/2020/01/09/filters-be... > The whole thing is driven by one data point and a linear trend which makes no theoretical sense in the context of the paper (from the abstract: “Air testing conducted inside schools during the leak (but before air filters were installed) showed no presence of natural gas pollutant…

The material impacts associated with the recommendations a study makes can influence the results in a way that does not favor objectivity.

Re: Installing air filters in classrooms has surprisingly large educational benefits (2020)

#26

Also, turns out preventing kids from getting sick improves educational outcomes.

My dad made a similar observation, assuming the children were young. However, upon reviewing the article, I noticed it doesn’t explicitly mention the grade level. Considering younger children have weaker immune systems, this could potentially lead to fewer missed classes and improved grades. Personally, my first grader misses out on a considerable number of classes. However, if these results were observed in grades 3…

do younger children have weaker immune systems?

Re: Installing air filters in classrooms has surprisingly large educational benefits (2020)

#27
A study published just yesterday [1] showed that just two airborne diseases [2] were responsible for approximately 85% of all sicks days in Greece during 2023-2024. Disregarding the common-sense argument that reducing collective suffering is a good thing overall - even by the cold hard logic of capital, being able to reduce company sick days by up to 85% is a huge opportunity.

Imo we're way overdue standards and controls for clean indoor air that are on par with standards for drinking water and food. Like this article shows, we have the tech to provide clean air today. All we're missing is policy to uniformly deploy it.

[1]: https://www.sciencedirect.com/science/article/abs/pii/S01966...

[2]: SARS-CoV-19: ~75% of sick days, Influenza: ~10% of sick days

Re: Installing air filters in classrooms has surprisingly large educational benefits (2020)

#28

Does anyone have any details on what kind of filter this was? I bought a relatively high-MERV filter for my home, but I’m wondering what I should actually be trying to filter out.

MERV 13's are optimal for particle removal because compared to a HEPA some of the removal requires multiple passes but the filters are a lot less restrictive and allow higher airflow. Corsi and Rosenthal looked into this with the CR box and came to the conclusion its technically faster at clearing a room than using HEPA standard filters. For infections and damaging PM2.5 particles mechanical filtration with MERV13 is…

for infections you can use UVC, which is something people often overlook, although of course that has its downsides

Re: Installing air filters in classrooms has surprisingly large educational benefits (2020)

#29
post #6

Someone writes whether the data actually shows what it purports to show: https://statmodeling.stat.columbia.edu/2020/01/09/filters-be... > The whole thing is driven by one data point and a linear trend which makes no theoretical sense in the context of the paper (from the abstract: “Air testing conducted inside schools during the leak (but before air filters were installed) showed no presence of natural gas pollutant…

The study itself is pretty explicit that it is just one encouraging case study which the authors believe merits follow-up research, rather than something conclusive. Matt Y's reporting isn't as forthcoming about this as it probably should've been, but he does also say the same thing at the end. He sort of buried the lede but didn't lie or anything.

Re: Installing air filters in classrooms has surprisingly large educational benefits (2020)

#30
post #9

I'm all for installing air filters in classrooms for a number of reasons, but I also think the extreme results from this study aren't going to hold up to further research. From the paper: > To do so, I leverage a unique setting arising from the largest gas leak in United States history, whereby the offending gas company installed air filters in every classroom, office and common area for all schools within five miles…

Based on your comment, the effect could be larger as well as smaller.

All research is met on HN by people who know better and will tell you why it's flawed. There isn't a greater collection of expertise in the history of the world than on HN.

Edit: I meant to add: What value can we find in this research? It wasn't published as scripture, the perfect answer to all our problems. It's one study of some interesting events and data; what can we get out of it?

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