Doctors often times have mentioned dry air as one of the causes for nose, throat, and other physical aggravations. Heated air dries out and shrinks wood framing around doors and window frames.
Gaps occur, permitting cold outside air infiltration.
Heat loss and higher heating cost are often the result. Proper humidity reduces heating costs by reducing wood shrinkage, which reduces cold air infiltration around door and window frames. In turn, you'll feel warm at lower temperatures and the level of comfort from your HVAC system will be enhanced.