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* Testing/replacing car air filter * Any mask outside. Even surgical can cut more than half of pm 2.5 * A lot of people recommending indoor filters, but indoo
by graeme 4y ago
* Testing/replacing car air filter
* Any mask outside. Even surgical can cut more than half of pm 2.5
* A lot of people recommending indoor filters, but indoor pollution generally a lot less than outdoors except when cooking. You can verify this with a PM 2.5 monitor. I do recommend indoor filters, but if budget is limited and you're working on overall lower pm 2.5 filters, testing car and getting masks is the more effective intervention
Surgical mask source: https://smartairfilters.com/en/blog/surgical-masks-surprisingly-effective-pm2-5/ https://smartairfilters.com/en/blog/surgical-masks-surprisin...
Best pm 2.5 monitor I found is a laseregg
- 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.