Health - in addition to the comfort issues, dry air can be the ideal atmosphere for the growth of bacteria and viruses. Viral infections such as a cold or flu are easier to contract or pass to others under low humidity conditions. Overly dry air causes itchy, cracked skin, eye irritation, stuffy nasal passages. These
problems can be controlled through proper
humidification. Keeping your home properly
humidified can also help minimize the dust
mite population and the growth of mold.

Efficiency - As the moisture from indoor air evaporates, the temperature in your home feels colder. In the winter, that means you will turn up the thermostat to feel comfortable. As a result, your system will use extra energy. By putting moisture back into the air, a humidifier allows you to remain comfortable at a lower heating temperature for lower energy use and greater operating efficiency.