"Indoor humidity" refers to the amount of moisture or water vapor present in the air inside a building or room. It tells us how damp or dry the air feels indoors. Full definition
They can alleviate cold symptoms by regulating indoor humidity levels. (daddylibrary.com)
The Lyric's indoor humidity sensor was particularly useful in maintaining comfortable temps in my home. (techhive.com)
Humidifiers add moisture to the air and raise the level of indoor humidity, helping to ease cold symptoms and reduce dry skin or itchy eyes. (babycare247.com)