Dry air, with a humidity lower than 40%, can cause headaches, sore eyes, a dry throat, an irritated nose and skin problems. In addition, a cold regularly crops up in a hospital or healthcare institution because of the dry air, causing germs to float.
Research shows that an optimal humidity level between 50-60%rV inhibits the spread of viruses, allowing patients to recover faster. Employees function better and run less risk of getting sick.