Fugten

Fugten is the definite singular form of the Danish noun fugt, meaning humidity or moisture in the air. In Danish usage, fugten refers to the amount of water vapor present in the atmosphere, whether outdoors or indoors, and appears in meteorological reports, climate‑control literature and everyday language when discussing air quality. The term is closely related to phrases such as luftfugtighed (air humidity) and fugt i bygninger (moisture in buildings).

In meteorology and building science, fugten is typically described using measures of relative humidity, expressed as a percentage, or absolute humidity, measured in grams per cubic meter. Hygroscopic and structural effects of fugten include condensation, mold growth, wood warping, and corrosion; controlling fugt through ventilation, dehumidification, and insulation is a common design concern in homes and industrial facilities. Seasonal variations influence fugten due to temperature changes, precipitation, and occupancy patterns.

Etymology and usage: Fugten derives from the Danish noun fugt. The concept exists in other Scandinavian languages with similar forms and meanings, reflecting a shared Germanic heritage. In everyday language, fugten may be used more generally to describe moisture-related conditions inside spaces and climates.

See also: fugt; relative humidity; dew point; condensation; indoor air quality.