The effects of condensation in the aquatic space

Excessive condensation, what are the risks?

The phenomenon of humidity and condensation in indoor swimming pools is classic. If no ventilation system is put in place, the consequences on the structure, on the bathers and even on the swimming pool and its equipment will undoubtedly suffer. It is essential to take certain steps to remedy this. The dehumidifier is the most frequently used option.

What are the effects of condensation on the building?

Condensation can be linked to a construction problem, particularly when the swimming pool is installed in an already existing room and which does not necessarily meet the requirements and constraints of an aquatic room. It is the specific character of this enclosed place containing a pool of water that is in question. The humidity is often above 70% and the room temperature is between 25 and 28°C, while in the house the humidity level is between 40 and 60% for an ambient temperature of 20°C. This high level of humidity becomes a real problem.

What is the humidity like in the water room?

Very often, condensation is visible in places where the temperature difference is greatest, generally it is concentrated first on the windows.

The walls can be cool and even damp if the condensation is significant . When the situation persists, water runoff appears, even damaging the coating. Pools of stagnant water form at the base of walls and windows. In this hot and humid environment, the conditions are ideal for the rapid development of algae, fungi, mites and bacteria.

In the medium term, humidity causes the paint on the walls and ceiling to burst. Mildew and black mold appear on tile joints, walls, etc.

Wooden beams, wooden objects and furniture become damaged and fungi take hold.

The fabrics, the sun lounger cushions, the armchairs... give off a musty smell that is not very pleasant.

The effects of condensation on the swimming pool

Excessive ambient humidity can create blackish mold around the pool but also moss, corrosion can even appear on the diving board, the ladder... even though it was designed for this difficult environment.

It is also possible that the electronic devices installed in the room malfunction or regularly break down.

Other effects of humidity, traces of water dripping on the windows or on the shelter are unsightly and unsightly. To make them disappear and find an attractive space, cleaning is essential. And frankly, the pool area is for pleasure, not for cleaning.

Condensation is due to the evaporation of pool water. The water level is dropping, so you have to compensate for this loss and fill the pool regularly, more often than necessary.

What are the effects of condensation on swimmers?

Because of the high humidity, the human body finds it difficult to estimate the real temperature of the room, the impression that it is too hot or the feeling of cold predominates.

Some bathers will have difficulty breathing, especially if they are (or have a tendency to) allergies or asthma. Microorganisms present in humid air promote rhinitis and bronchitis.

Discomfort may be felt by people sensitive to joint pain. Ambient humidity can cause joint pain, rheumatism, osteoarthritis, especially for people prone to this type of ailment.

Not to mention the discomfort caused by the persistent and unpleasant odors that are created in a indoor swimming pool saturated with humidity.


Excessive condensation in the aquatic room has health consequences and leads to additional costs: frequent filling for leveling the pool, cleaning products to remove mold, traces left by running water … and time because these various inconveniences are particularly stubborn and difficult to eliminate. The aquatic piece gradually deteriorates and becomes visually unattractive and uninviting. The concentration of humidity gives an impression of cold, the pool room will then be more heated leading to a higher energy cost.

We must therefore not neglect the appearance of certain signs linked to excessive condensation. The swimming pool dehumidifier is essential and proves to be an effective and economical solution.

Knowing how condensation is created in the pool room s essential to fully understand the phenomenon of condensation in the pool room and thus combat it effectively. Care should be taken to regularly measure the humidity of the indoor swimming pool in order to reduce the risk of condensation.