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Indoor winter humidity level affects required heat set-point for comfort?
I have heard that keeping indoor humidity levels in winter around 40% will make for greater comfort--partly in the sense that it will seem warmer at the same set point. It occurs to me as I'm looking at putting in a new boiler, that, in addition, adding a whole house humidifier to our attic central AC might allow a lower set point and save heating $$. (Like in summer, we can feel cooler with lower humidity levels.)