It's me, the social media manager. If you're reading this, I'm on vacation, and we heard the cool accounts post things like this. Anyway, please try your best to stay healthy while I'm gone. And don't worry, the rest of the graphics this week will not look like this, thanks to post scheduling.

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I had my granddaughter, her mom, and mom's fiance over at 4 pm on Sunday. CO2 went from 700 to 1700 while they were here, and we went out to the park for an hour. They left at 7 pm and hours later CO2 was still over 1000.

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...the aranet4 is a powerful tool for promoting #CleanAir because even people who don't wear masks prefer lower CO2 levels for their own working/learning environment. Every teacher ought to have access to one

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Ah! Now that we have the decay curve we can calculate ACH. Given: start 1860; end 1100, ambient 435, duration 6 hours. The air change rate in that classroom is 0.13 air changes per hour. That's what air leakage on a mild day looks like. Completely insufficient by any measure!

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Im hearing coughing & seeing symptomatic students show up in school. And a colleague borrowed my aranet4 whi ch showed high CO2 levels (& potentially infectious aerosols) even 5 mins after students left the class

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