Hi Sir: Please see my comments: 1. Before this do I need to reinitialize as if it's turned on for the first time and it is better not to load the previous state file which is not helpful, if load it, mabye you will get the odd results. 2. When the environment are changed, the standard of good/bad air quality will be defined, because IAQ 25 is the standard of good air and 250 is the standard of bad air, even if change into better or worse environment, IAQ is larger than 250 or smaller than 25, after a long time, the IAQ value will scale to 25 or 250. Vice versa.
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