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> indoor pollution generally a lot less than outdoors Why would that be? Unless you have central A/C with good filter, I don't see how indoor air would be clea
by gniv 4y ago
> indoor pollution generally a lot less than outdoors
Why would that be? Unless you have central A/C with good filter, I don't see how indoor air would be cleaner.
- graeme 4y agoCouldn't say. If I had to guess, a lot of ventilation happens through walls which act as a filter. Even window screens likely do. Regardless of reason, my AQI will regularly be 4-13 indoors when it is 38-54 outside, even if I have windows open. Note that this only covers PM 2.5, and not other stuff such as VOCs etc.