The right level of humidity in rooms affects the level of comfort perceived by people and reduces the risk of respiratory illnesses.

Humidification is generally required during the winter period, as heating systems "dry" the air, causing dry throat, chapped skin

and lips and sore eyes. Comfort depends on the relative humidity: in winter, even if there is fog outside (100% relative

humidity), the building heating systems increase the temperature of the air to a comfortable level, around 20 °C. In this way, the

relative humidity decreases to values even as low as 10-30%,which are perceived as dry air