American Standard ACONT900AC43UA Owner's Manual page 47

-2 - Offset humidity display by -2%
-1 - Offset humidity display by -1%
0 - Offset humidity display by 0%
1 - Offset humidity display by 1%
2 - Offset humidity display by 2%
3 - Offset humidity display by 3%
4 - Offset humidity display by 4%
5 - Offset humidity display by 5%
NOTE: Offsetting the indoor humidity display affects both the display as well as the control.
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