What is the name for the temperature at which moisture starts to condense from the air?

The temperature at which moisture begins to condense from the air is referred to as the dew point temperature. This is a critical concept in understanding humidity and moisture in the air. When the air temperature drops to the dew point, the air becomes saturated, meaning it can no longer hold all the moisture it contains. As a result, the excess moisture starts to condense into water droplets, which is commonly observed as dew or fog.

Identifying the dew point temperature is essential in various applications, including air conditioning, meteorology, and HVAC system design. It helps in predicting weather conditions and understanding indoor air quality. Conversely, the other terms listed do not accurately represent this phenomenon; for example, the boiling point relates to the temperature at which a substance changes from liquid to gas, while the freezing point pertains to the temperature at which a liquid turns into a solid. These concepts, while relevant in thermodynamics, do not directly address moisture condensation in the air.