“There is a toggle that changes the PM setting to 1 or 2.5 or 10. What does PM stand for? What do the various settings indicate? The large digital number in the middle of the dial is at zero. What does that mean? What should it be at optimum number?”
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Blueair - Blue Pure 211i Max 3000 Sq. Ft HEPASilent Smart Extra-Large Room Air Purifier - White/Gray
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PM stands for particle size. Measured in microns. 0 is better number.
Sorry, there was a problem. Please try again later.PM means particulate matter in the air that is detected by the sensors and 0 is optimal for all levels.meaning the air is clean.
Sorry, there was a problem. Please try again later.The setting indicates different sizes of particulates.
Sorry, there was a problem. Please try again later.It just tells you the particle size being filter and how much is left in the air.
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