There is maximum amount of water that may be held by air in a house at the lowest and the highest temperatures.
temperature °C max.water gr/m3 sıcaklık °C Max.su gr/m3
-20 0,08 5 6,79
-10 2,14 10 9,39
-5 3,25 15 12,84
0 4,84 20 17,29
The lower the air temperature is, the less amount of water vapor that the air could hold.
In addition to temperature, moisture rate is another important factors for perspiration. If there is large quantity of water vapor in the air, perspiration occurs when the air hits a surface with such temperature less than that in the room.
- If the room temperature is 20°C and the moisture rate in the room is 95%, then perspiration starts to occur when the temperature of the glass surface is 19°C.
However, when the moisture rate is low in the room with the same temperature, i.e.:
- If the room temperature is 20°C and the moisture rate in the room is 60%, then perspiration starts to occur when the temperature of the glass surface is 12°C.
That means, keeping the moisture rate in the room low is an important factor to prevent perspiration.
According to scientific data, the moisture values of a room with 18°C to 20°C:
-if less than 50%, it is considered Dry
-if between 50% and 50%, it is considered Normal
-if between 60% and 75%, it is considered Moist
-if more than 75%, it is considered Wet
Another phenomenon similar to perspiration in a house:
It is observed that condensation will gradually disappear when the temperature of the internal surface of the glasses in a car exposed to cold in the winter is increased by breathing of the passengers causing sufficient amount of moisture in the air.