Which CO2 meter did you get, how accurate is it and how much did it cost? Agreed people just need a meter good enough to tell them when air quality isn’t good.
The brand is Simr, but I think there are only 3 or 4 meters that are sold as whitelabel and rebranded a thousand times.
I think it was around $30.
Outside it measures around 400ppm so the base point is good. Inside it measures 480ppm with good ventilation. When someone farts it goes to 2000ppm for a while. So I think it measures 'alright'.
