[bombcar]

I suspect I know exactly which one you bought ;)

I wish I could find a good source for "outside CO2 levels" as I think they've been elevated but I have no way to prove it (beyond my indoor sensor showing high).

[newman314]

Aranet4 is the way to go.

Tried going cheap and getting a bunch of Vitalights later as additional monitors but ended up finding out that their results were all over the place.

Returned the Vitalight. Kept the Aranet4.

I do have plans to build a few Airgradients when I have time.

[trog]

co2.click also worth a look: https://www.co2.click/

[_zoltan_]

uf, looks so ugly. I can't justify putting this into my home.

[autoexec]

it's a box? You could put a sticker on it, bedazzle it, or paint it with nail polish if you want something fancier.

[victor106]

It does not seem to have PM2.5

[athollywood]

Airthings! It’s great.