In the winter turning up your thermostat dries out your house. You may experience dry skin, hardwood floors separate at the seams, woodwork and furniture shrink and crack. Wall paper peels at the edges. Humidifiers add moisture to every room in your home. The American Society of Heating, Refrigerating and Air Conditioning (ASHRAE) recommends that the relative humidity in your home should be between 30-60 % in order to minimize the growth of bacterial, it will also help you stay comfortable at lower thermostat levels.