Creating and maintaining a favorable microclimate in an indoor pool is a complex engineering task, the solution of which begins at the design stage. Let’s discuss the device of the pool ventilation system for a private house.

  • Features of the microclimate of indoor pools

  • Air dehumidification in an indoor swimming pool

  • Pool ventilation

  • Pool heating

  • Multifunctional units for swimming pools

Swimming pools in private homes are no longer a rarity, but the norm.

Swimming pools in private homes are no longer a rarity, but the norm

Swimming pools in private homes are no longer a rarity, but the norm. As well as saunas. Moreover, the peculiarities of our climate are such that in 90% of cases the pools are covered. But building a pool to make you happy is not enough. It is also required to make it so that it gives pleasure, contributes to recovery, and does not create problems. And here you can not do without special climatic equipment.

When operating an indoor pool, three “climatic” processes are required at once: organization of air exchange, air dehumidification and space heating. Not surprisingly, contrary to popular belief, the capital costs of building a pool are actually less than the operating costs of maintaining it. Therefore, the choice of equipment for the ventilation system in the pool should be approached very carefully. Let’s try to figure out in detail how to create effective and at the same time economical ventilation in the pool of a private house.

Features of the microclimate of indoor pools

The requirements for the microclimate of indoor pools are very strict, but failure to comply with these requirements can lead to unpleasant consequences both for those who visit it, and for the pool itself and the equipment that is installed in it. The main feature of any pool is the presence of a large amount of water, which has a significant plane of the mirror, from which moisture is constantly evaporating.

Menerga ThermoCond 39 air conditioning unit with asymmetric high-performance heat exchanger and integrated heat pump

Menerga ThermoCond 39 air conditioning unit with asymmetric high-performance heat exchanger and integrated heat pump

The evaporation process occurs even in stagnant water, and with intense wave formation, the appearance of splashes, when someone splashes in the pool, it increases by 10-60%, depending on the number of bathers. Water vapor is also formed from other sources: from the surface of the floor flooded with water, and from the surface of the body of a person in the room.

No matter how heavily you use your pool, the high rate of water evaporation requires the pool ventilation system to be on 24 hours a day. Of course, this mode of operation leads to high costs, so efficiency is one of the mandatory requirements for pool ventilation equipment.

There are certain environmental requirements for an indoor pool.


Value range

Air temperature


Water temperature


Relative humidity


Air flow rate

no more than 0.2 m/s

Air exchange rate

4-5 times in 1 hour

The concentration of chlorine in the air

no more than 0.1 mg / cu. m

We emphasize once again that these parameters must be observed all 24 hours, regardless of whether you use your pool or not. Some, in order to save money, purchase a special flooring that covers the water mirror during the non-working period, but in this way it will not be possible to completely solve the problem of humidity, in any case, it is necessary to additionally dry the air mechanically. Although it is better to purchase a protective film that covers the surface of the water in the absence of people. By the way, opening the vents is also not effective.

Air dehumidification in an indoor swimming pool

High humidity is harmful. It not only leads to the formation of mold, fungus on the walls, deterioration in the quality of building structures and damage to various equipment, but also adversely affects human health and well-being. Read more about the dangers of waterlogged air here.

Scheme of connecting the storage water heater

The principle of operation of a ventilation unit with a heat exchanger

The dehumidifier in the pool will ensure the maintenance of a comfortable level of air humidity in the room in accordance with the specified parameters. Operation in a room with a high level of moisture evaporation, as well as the presence of various reagents in the air for purifying pool water, imposes some design features on pool dehumidifiers. For example, their body is made of hot-rolled galvanized steel with an additional layer of outer and inner enamel coating, special frost protection devices are used, etc.

Dehumidifiers for swimming pools are mobile and stationary types. Stationary dehumidifiers, as a rule, are installed in the room next to the pool, because. they are quite noisy and are characterized by greater power compared to mobile ones. Suction and discharge air ducts or channels are connected to the pool room from a stationary dehumidifier, therefore stationary air dehumidifiers are also called channel dehumidifiers.

Evan Company

Valery Vorontsov, Deputy General Director of the company Systemair

“In order to calculate the parameters of a multifunctional pool unit, you need to know not only the area of ​​the water surface, but also, for example, which attractions will be installed in the pool, as well as the total volume of the pool room and the glazing area.”

Mobile dehumidifiers are most often found in wall-mounted versions, less often in floor-mounted ones. As a rule, these are monoblock machines designed for swimming pools, the area of ​​​​the water surface of which does not exceed 40 square meters. m. Although there are more powerful models.

A more economical and easy-to-use option is to purchase a multifunctional pool unit that can dry the air, ventilate, and heat. More on this below.

Popular Models

Pool Ventilation Units VBW Engineering BS-1

Units for ventilation and air conditioning in the pool room Dantherm 2 HP

Pool air conditioner with Menerga 19 recuperator

Ventilation units for swimming pools: all models

Pool ventilation

Natural ventilation for the operation of the pool is not enough, you will have to make a supply and exhaust ventilation system. To do this, you can purchase a supply and exhaust ventilation unit. But remember, the hood in it should be 10-15% more powerful than the system that provides air flow. This is necessary so that unpleasant odors and exhaust air from the pool room are completely removed, and do not remain inside, mixing with fresh air.

Dehumidifier for swimming pools Royal Clima Riviera DAR 204

Dehumidifier for swimming pools Royal Clima Riviera DAR 204

It is believed that the supply and exhaust ventilation system provides a comfortable microclimate in the pool room, the volume of supply air from the street should be approximately seven times the volume of the room itself.

When installing the ventilation system, it is necessary to perform it in such a way that the movement of air, both supply and exhaust, is carried out along the walls and ceilings, and the air flows themselves are uniform — to eliminate the discomfort of people in the pool.

There are other little tricks for more comfort in the pool. For example, installing slot diffusers will help solve the problem of fogging windows. It is very difficult to calculate this on your own, so it is better to entrust the calculation of pool ventilation to specialists.

Pool heating

As already mentioned, the microclimate in the pool must be maintained 24 hours a day, so the main requirement for the pool heating system is clear — it must be economical, in other words, energy efficient. Energy efficiency is achieved in two main ways:

  • using a recuperator

  • setting the operating modes of the system using automation.

The heat exchanger heats the supply air by using the heat from the exhaust air. The presence of a heat exchanger allows you to reduce the heater power in the ventilation unit by 2-2.5 times and save up to 80% of heat. Which has a positive effect on the overall energy consumption.

ThermoAlliance Company

Stanislav Shary, Brand Manager of the company «Neoclima»

“A huge amount of moisture evaporates from the water mirror in the pool, and if such rooms are not drained, sooner or later the pool will simply overgrow with mold.”

Automation is no less important for optimizing costs. Today, the market offers a wide range of ventilation units that allow you to set the operating modes of the ventilation system depending on the time of year and time of day.

At night, when there are no people in the pool, it is logical to set a mode with a high content of water vapor, for example, up to a level of 75%, i.e. reduce the cost of dehumidification. This mode will not damage structural elements and equipment, and during the day, when the pool is used again, air dehumidification will be carried out as usual.

It is even more important in terms of energy consumption to adjust the seasonal modes of operation of the pool ventilation. In winter, for example, the user can select dehumidifying mode or heating mode, depending on the outdoor temperature and their needs. And in the summer, when it is not necessary to utilize the heat, turn off the heat exchanger completely.

Some manufacturers produce models of ventilation multifunctional units for swimming pools with an integrated heat pump, which further increases energy efficiency.

Multifunctional units for swimming pools

Unlike public pools and water parks, pools in a private house are visited relatively rarely and are idle for most of the day. Therefore, continuous addition of fresh air to the pool room is not always required, which keeps the operating costs low, in particular during the cold months of the year.

Multifunctional installation for swimming pools VBW Engineering OKEANOS BS-2

Multifunctional installation for swimming pools VBW Engineering OKEANOS BS-2

In other words, to optimize the costs of operating pools in a private house, it is better to choose multifunctional equipment with an advanced control system that allows you to set various operating modes. Today, there are many models of multifunctional units on the market (they are also called climate control units), which can do everything: provide air exchange, dehumidify the air, heat the room and even heat the water in the pool. Some of them are compatible with smart home systems.

Of course, the cost of purchasing and installing such units will be higher than when using separately purchased dehumidifiers and air handling units, but operating costs will decrease. What is better — everyone decides for himself.

Popular Models

Pool dehumidifier Fral 63

Dehumidifiers for pool halls Dantherm 35

Wall-mounted dehumidifiers for swimming pools Remko 20

Pool dehumidifiers: all models

What is a pool dehumidifier ✮Large selection of pool ventilation systems on TopClimat.ru portal

Source: TopClimat.com


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