I'll add later You can search the online lookup table for unit conversions, but let's just say if it shows less than 12 then you're fine and if it shows more than 35 you should do something about it, especially if it does it is an indoor display. 2 is not. As far as I know, below 5 Β΅g/m3 is not really a problem. 3. It takes some time to get a good reading, especially when moving from an area with good air quality to an area with poor air quality. Better just restart it in the area with bad air quality. Overall it's good value for money once you know the caveat. For me, I just need to determine if I need to run the air purifier at maximum speed when the outside air quality is poor, or if I can operate in a quieter mode and still have decent air quality inside.
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