3
20°C
5 l
30°C
5 l
ENGLISH
Brief notes on humidity
Air naturally contains a given quantity of water in the form of water vapour which determines its humidity level.
The capacity of air to hold water vapour is, however, limited and depends on its temperature: the higher the
temperature, the greater the quantity of water vapour which can be held in the air. The absolute humidity (A.H.)
value indicates the quantity of water contained in 1 kg of air and is expressed in grammes. The relative
humidity (R.H.) value is the percentage ratio of the quantity of water contained in 1 kg of air and the maximum
quantity which can be contained under the same environmental conditions.
In other words, we can imagine the air in a room at a certain temperature as a container with a given capacity,
let us say 10 litres, for example. Supposing we fill it half way with water, we would then say that the container
is 50% full (relative humidity) and that 5 litres of water are contained in it (absolute humidity). When the
container is completely full, we would describe it as “saturated” or say that we have 100% relative humidity.
Increasing the temperature is like increasing the capacity of the container. When the air is at 20˚C it is therefore
as if we had a 10 litre container, whereas when the air is at 30˚C it is as if we had a 20 litre container.
There are consequently two ways of reducing the relative humidity:
-
removing water
-
raising the temperature of the air
The new dehumidifier makes it possible to carry out both operations simultaneously, bringing you exceptional
dehumidifying speed and power.
20°C
5 l
20°C
2,5 l
R.H. = 25%
A.H. = 2.5 l
2.5 l water
removed
R.H. = 50%
A.H. = 5 l
R.H. = 50%
A.H. = 5 l
R.H. = 25%
A.H. = 5 l
no water removed
Experts have established that optimal atmospheric conditions, both for our physical health and the
preservation of furniture and other items, vary between 45% and 60% relative humidity. It is therefore
advisable to keep rooms within these values.