Air treatment

Air treatment for indoor pools

If not properly maintained, your indoor pool can experience serious humidity problems. In addition to good insulation and an effective ventilation system, it is important to dehumidify the room to extend the life of your equipment as long as possible.

Why treat the air in your indoor pool?

Humidity is caused by two elements: water and air. In the case of an indoor swimming pool, the space is partitioned. The air in the room is hot, the standing water in your pool evaporates, but the water vapor is not properly evacuated. This then causes saturation of humidity and condensation .

The main risk is that this humidity degrades the structure of your pool , but also your furniture and your walls. You may see mold appear, often accompanied by bad odors. It can also have an impact on your health: respiratory problems, allergies, etc.

Thus, the humidity level of your indoor pool must be between 60% and 70% to maintain correct air quality. A dehumidifier can help you control the relative humidity in the room.

What are the different types of air dehumidifier?

In the past, to control the humidity of the air, we replaced the air inside the swimming pool with fresh air. This fresh air improves comfort, but heating it can quickly become expensive in terms of energy consumption. We have seen inflation in energy prices and environmental awareness in recent years. This has led manufacturers to lean towards air recycling .

The condensing dehumidifier

It consists of a fan, a cooling unit, and if necessary, an outside air intake. The cooling unit itself consists of an evaporator, a condenser and a compressor.

A condensing dehumidifier draws in moist air and directs it to the evaporator, powered by a compressor. The evaporator has a negative temperature. This will cause a thermal shock and condense the water vapor. The air then treated is heated and reinjected into the room. The air is renewed regularly, thus avoiding humidity problems.

This dehumidification system has the advantage of being easy to install and inexpensive . However, it can only admit a limited volume of fresh air. It is therefore more suitable for private, hotel or spa pools , due to their reduced to moderate size, since they do not require a large volume of fresh air.


The ventilation dehumidifier (double flow)

A dual flow dehumidifier includes a fan, a heat recovery section, a mixing section. The air can thus be partially or completely replaced. It can also be fitted with a heat pump which provides better heat recovery and reduces the volume of outdoor air required.

Here, moist, warm air is drawn in and replaced with dry outside air. Then, it is captured by the heat recovery box, which is generally located in a plate heat exchanger.

This ventilation system has the advantage of optimally regulating humidity and room temperature. It allows to use as much outside air as necessary. However, it will not be usable if the outside air is wetter than the indoor air. It is also more expensive and bulky to install. It is therefore rather designed for large public swimming pools .