What’s the default indoor/outdoor difference in pm2.5 and ozone without interventions like hepa+carbon filters? Assuming closed but not sealed windows and with/without AC...
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No, that's cheap! For an air quality sensor, that is. If I wanted to go the next step up and have a portable sensor that can measure more, it would be something like $5000 for the base monitor and a few modules.https://www.aeroqual.com/product/series-500-portable-air-pollution-monitor …
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Which is why I haven't bought an Aeroqual. Even so, the situation is better than about 15-20 years ago when an equivalent sensor was about $25 000.
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