What setting should I use for my humidifier control?

Industry experts (ASHRAE) recommend optimal Relative Humidity (RH) at between 40-60% RH on an average annual basis and 35% during the heating season in dry climates. Too little humidity can leave the body vulnerable to viruses and bacteria and can cause woodwork in your home to shrink and crack. On the other hand, too much humidity creates ideal conditions for mold and mildew growth. If you notice condensation on your windows, lower the setting on the humidistat.