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It really depends on your building too. I live near a highway and getting around by car is really convenient as a result. Highway noise is not very audible due to the construction of the windows and the walls. My air quality meter says the PM1.0, PM2.5 & PM10 counts are 3-1 ug/m^3 inside and I don't have air filters on.

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I live next to a highway and am concerned about air quality too, what meter do you use?

I have a handheld one by igeress that I got on amazon. It's basically a no name chinese one, so YMMV. They also have a pretty bad pollution problem too, so probably some of the better consumer ones are from there too.

What air quality meter do you use, if you don’t mind my asking?

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