> co2 and pm should both go down with windows open.
Very much depends on where you live. I have a few DIY air quality stations with data being piped to Grafana. I just looked at the latest data, the average outside PM level for the past 5 months has been around 100 µg/m³, while inside it's around 10 µg/m³.
This spring happens to be pretty windy and this skews the outside levels down, otherwise the ratio would be much worse.
Don't think this would be true in any city in Asia or for city centers around the world.
i live in LA on a relatively busy neighborhood street and according to my air quality meter, it’s true. concentrations go down during the day (windows open) and up at night (windows closed).
edit: i mentioned the road to note that outdoor pollution is higher during the day, yet opening the windows despite that lowers overall particulate levels indoors. it may be different in indian cities or cities like beijing with much higher pollution levels.
Re:The health benefits of better air
by PurpleFoxy on Wednesday April 28, 2021 @01:05AM
(#26965790)
I have noticed every time I open my windows, the no2 levels reported on my Dyson filter spike. Not sure what to make of it but it’s interesting.
nox is a combustion byproduct so probably that?
Yeah I would assume it was coming mostly from nearby cars.
Re:The health benefits of better air
by PurpleFoxy on Wednesday April 28, 2021 @07:22AM
(#26968108)
The crazy thing is there are no nearby cars. There is a highway about 1.5km away which I assume it must all blow from. There is nothing else within 1.5km
i put my air purifiers on low when the windows are open to deal with the particles i throw up by moving around and doing stuff indoors. with the windows closed (usually only at night), i put the air purifiers on medium/high.