I recently bought one of these air quality monitors and got to take it out for some measurements!

I'll share some findings in this thread.

CCing @CO2Guerrillas here, in case they would like to share.

A very quick intro:

This device measures:

-CO2 concentration
-relative humidity
-atmospheric pressure
-temperature

I spent ~$200 on Amazon. It pairs with your phone and you can watch data come in every minute or so.

https://t.co/aoXjyq8kdu

A lot of covid transmission is airborne. So, having clean air is a must for reducing transmission.

A great way to see how much clean air you are getting is to measure CO2 concentration.

Too high -> you could use more ventilation -> open some windows!

So, I walked around town and took some measurements.

Outdoor CO2 concentration should be about 400 ppm. I haven't calibrated my device yet, so I measured ~470. Close enough.

<800 is good for indoors. Something like 2000 is very bad.

https://t.co/oZAkVnr9ts

For a reference: inside my apartment I quickly get ~1000 ppm if I don't have windows open. Maybe ~1500 if things get bad.

If I crack some windows, even just barely, it gets down to ~600 ppm very quickly, and my heater can keep the apartment ~70 F no problem.