@czarbucks
Yes! Since about May. Use #CO2Click and #Aranet4HOME and got living room levels down to 600 to 700 pretty easily with a small window opening in dining room; bedroom down to 700 rather than 1100 in the morning, same solution. Finding lower levels now in colder weather; closing window to see what happens. Take one pretty much everywhere. My vet's exam room was over 2000ppm in Sept. 😵‍💫
Do you know about www.CO2trackers.com? Maybe you can add your data?

Sometimes you do have to recalibrate #Aranet4HOME. This one is about 3 months old, and after several hours outside, it hovered above 500 ppm. Should be ~420 to 440. Recalibrated and all is well. My #CO2Click and the Aranet4 are getting along quite well now.
Can't wait to compare both to the DIY #AirGradient arriving soon...

Die Winterwelle dürfte sich gerade aufbauen. Aufgrund der niedrigen Außentemperaturen wird in Schulen weniger gelüftet, wird uns berichtet. Deckt sich m unseren Messungen (sehen im Mittel deutlich höhere CO2 Werte, wenn wir Klassen m #Aranet4Home betreten)!

#VentilationIsKey
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RT @EllingUlrich
Total incidence growing again. BQ.1.*, BF.7 and BA.5 now each around at 25-28%, BA.5 decreasing fast. XBB.* at 2.7%, BA.2.75s including CH.1…
https://twitter.com/EllingUlrich/status/1593642023025889282

Hat zufällig jemensch eine Quelle wo man aktuell - und bitte nur wenn sofort vorrätig - einige Aranet4 CO2 Datenlogger Sensoren bekommen könnte? Bittedanke. #followerpower #ARANET #Aranet4 #Aranet4HOME #Suche