Monitoring the level of humidity in your home is a good starting point. A healthy amount is between 35 and 50 percent. Dry air can cause people to feel chilly because the moisture on their skin is evaporating. A normal level of humidity can cause the air to feel warmer and allow homeowners to set the thermostat to a lower temperature. This will help maintain your comfort and keep your energy bills lower.
When you have a common cold, a humidifier can alleviate some discomfort. The same goes for everyday use—especially during the cold season. Dry air can cause or contribute to dehydrated skin, sore throats, itchy eyes, and bloody noses. It is actually easier for you to catch a cold or the flu in dry air conditions, which can cause an inflamed lining in your respiratory tract. But be aware of the other extreme: A high level of humidity can cultivate mold, bacteria, and fungi that is then released into the air you breathe.