Clean Air For Class

A campaign group urging the Scot Gov to place CO2 monitors and HEPA air purifiers in every classroom and count classmates as close contacts. Sign the petition!

[Clean Air For Class @CA4Class]

@CathNoakes @trishgreenhalgh @kprather88 @JimRosenthal4 @CleanAirCrewOrg @TravellingTabby @TigressEllie

[Clean Air For Class @CA4Class]

We’ve been quiet for too long. It’s vital now more than ever that classrooms have HEPA purifiers and Co2 monitors in every room. Protecting education is paramount so let’s make it safer. We shouldn’t have to choose between education and health.

[Clean Air For Class @CA4Class]

@scotgov @NicolaSturgeon
@jasonleitch @JohnSwinney @HumzaYousaf @scotgp @LongCovidSOS @long_covid @ClaireHastie1
@ZeroCovidScot
@Dr2NisreenAlwan
@chrischirp
@IndependentSage
@dgurdasani1 @SafeEdForAll_UK @LCKScotland @doctorasadkhan
@theAliceRoberts
@glasgowcc
@maureen0207

[Alex Huffman, Ph.D. @HuffmanLabDU]

19/ Or search many more resources (using 'Cntrl-F') for "CO2" on the (1) Reports, Guides, Tools; (2) Media; or (5) Threads tabs here:
https://t.co/QUNsMNh75O

[Alex Huffman, Ph.D. @HuffmanLabDU]

18/ Lots of other 🧵s to learn more about CO2 & ventilation, e.g. here by @CathNoakes, @Poppendieck, @CorsIAQ:
https://t.co/dONsgmD00d
https://t.co/JzBWXRLKpQ
https://t.co/jU7h54TV88
https://t.co/LMHB94Wr1I
https://t.co/lKGZKPv7E3
https://t.co/CSrZ3WwjPd

[Alex Huffman, Ph.D. @HuffmanLabDU]

17/ This is a good one-slide summary of #RebreathedFraction using CO2 as a tracer, by @Poppendieck:
https://t.co/lKGZKPv7E3

[Alex Huffman, Ph.D. @HuffmanLabDU]

16/One way to think about indoor CO2 concentrations is to consider the "rebreathed fraction". For every ~400 ppm above the baseline (usually also ~400 ppm), 1% of your air is '#rebreathed' from someone else's exhaled air. E.g. via @CorsIAQ:
https://t.co/YYg4xEDomF

[Alex Huffman, Ph.D. @HuffmanLabDU]

15/ This is a summary of a somewhat more technical perspective on using CO2 as a proxy for airborne viral aerosol risk indoors, with great additional info gathered by @jljcolorado:
https://t.co/4lxLTR0dhP

[Alex Huffman, Ph.D. @HuffmanLabDU]

14/ There are lots of tools available to understand how CO2 sensing can be leveraged best.

E.g. see this tool by @HarvardChanSPH & @j_g_allen (reminded today via @linseymarr)
https://t.co/YtXWR7bK92

[Alex Huffman, Ph.D. @HuffmanLabDU]

13/ I've gotten a lot of question about what CO2 sensor to buy. I use the #Aranet4 sensor extensively, but at ~$200+, it's not cheap.
[Aranet coupon: https://t.co/OZYGtZEcqt]

Whatever you buy, make sure the sensor is NDIR (non-dispersive infrared).
https://t.co/H5msbvrKo8

[Alex Huffman, Ph.D. @HuffmanLabDU]

12/ Several sites allow people to share their CO2 data for the public to see. For example, see the site put together by @ariccio or the work that @SchoolAQFund is now beginning.
https://t.co/d1f8rHRLmi

[Alex Huffman, Ph.D. @HuffmanLabDU]

11/ But #CO2 monitors are not just for school. I've loaned mine out to friends who have had fun seeing the invisible trends in various places they go.

Here is one set of anecdotes on how I played around with CO2 sensors in school, at work, and at home:
https://t.co/RiBjZbAhwV

[Alex Huffman, Ph.D. @HuffmanLabDU]

10/ Once you've collected your data, make sure to share using the hashtag #COVIDCO2 and peruse for further ideas & support (Thx @mdc_martinus!). Some have also used #SchoolCO2.
https://t.co/Wk1uAKPXvu

[Alex Huffman, Ph.D. @HuffmanLabDU]

9/ There are lots of creative ways that people have been using as they send CO2 monitors:
https://t.co/6C1YKjI1iX

[Alex Huffman, Ph.D. @HuffmanLabDU]

8/ I've been encouraging parents who want to send a CO2 sensor with a child to make sure they don't push a child past their comfort zone. Make sure the sensor won't be a distraction during the day. And it's important that the parent, not the student, bear the responsibility.

[Alex Huffman, Ph.D. @HuffmanLabDU]

7/ As @EmilyAnthes points out in the NY Times article above, many parents have seen backlash against sending CO2 monitors. Some of those brief parent stories are here:
https://t.co/k0yKDv0qpV
https://t.co/rBFo9SKJWe

[Alex Huffman, Ph.D. @HuffmanLabDU]

6/ Gathering CO2 data is often discouraged, however: “It’s possible that the school district may not be all that happy with this because I think it gives us a window into the fact that they may not actually be treating ventilation as seriously as they should be,” Dr. Huffman said