mm wrote:

Generally indoor humdity is insufficient in the winter, especially or
at least iirc if one has forced air heat. Unless your situation is
different, iIt would be better to have a humidifier connected to the
furnace, because that could give adequate humidity all of the time.
The higher humitidy is good for wood furniture (that is, very low
humitidy is bad for it, leads to cracking), good for some people who
have certain respiratory problems iirc, and it also makes one feel
more comfortable, so that the thermostat can be set lower for the same
feeling of comfort.

But evaporating the water takes about 10X more heat energy
than you save with a lower thermostat setting.

Nick