Hello twlawrenceko,
IAQ is calculated within the raw gas resistance. when absolute humidity changes, the gas resistance would be changed correspondingly even there is no obvious changes with gas concentration. when temperature changes, the absolute humidity would be changed correspondingly. In BSEC, there is one parameter to compensate the TH effects towards gas resistance. The purpose is to output nearly the same value of IAQ during such situation. But the compensation parameter varies with the usage time of sensors. It could not suit for every use-case.
... View more