What is dew point?

Dew point is the temperature at which the water vapor in the air becomes saturated and condensation begins. It is a measure of humidity given in terms of temperature. When humidity increases, the pressure of the water vapor will increase. When a gas comes into contact with a substance whose surface temperature is lower than its dew point, dew will form, hence the term “dew point.”

At atmospheric pressure, one cubic meter of air can hold 51.19 g of water vapor at 40°C whereas colder air at a temperature of -40°C can hold only 0.12 g per cubic meter.

The lower the volume, the drier the air.

Environment and Energy Conservation