CtrlTech offers customized pool dehumidification solution for indoor swimming pools, Jacuzzi, and Spas. Free site study to offer the right dehumidifier calculation selection and estimation.
The surface of a pool and the damp tiles around the pool are constantly being evaporated by huge quantities of water.
A swimming pool can evaporate in a single day thousands of litres of water.
There have been far too many private and public indoor swimming pools destroyed by mould, redness and corrosion, because inventory, walls and structures have never been installed.
Humidity is essential in itself and chlorine is at the same time an aggressive substance that attacks building materials severely when condensed.
A good dehumidification solution is an overall solution and therefore both dehumidification, temperature control and ventilation are covered in this Guide.
This Guide is based on the extensive know-how and many years of experience of CtrlTech in the dehumidification of thousands of indoor pools.
It's a mixture that we call, moist air. When heated and cooling, air expands. If the air is heated, more water vapour can be stored and less water vapour can be stored when it cools down. If the air refreshes a lot, it reaches the point of dew that means that the air is saturated and that water vapour condenses like water. The wet dot is a key term for indoor swimming pool dehumidification. Humid air condenses on a cold surface if the cold surface temperature is below the point of dew.
The relative humidity of the building, the water content of the air, the outdoor air temperature and the air flow in the rooms define the highest relative humidity possible with a specific room temperatures. The air condenses on the walls when the temperture of the wall is less than 19.5°C, for example if air inside the pool reaches a temperature of 28°C and its relative humidity is 60 percent.
For the health of users, and for the inventory of the pool room and the technical room in the pool, the right combination of chemicals in an indoor swimming pool is essential. Inadequately treated water leads to poor hygiene, while water that has been treated excessively leads to chlorinated gases in the air that may irritate the eyes and cause breathing problems
At the same time, the incorrect composition of chemical ingredients can, in a very short time, destroy the entire stock, including the dehumidifier and other air processing equipment. In accordance with EN/ISO 12944-2, protective class C4, the threshold values shown below apply to products in indoor pools. In order for the guarantee to be valid, these threshold values must be met.
Because the environment in an indoor swimming pool is aggressive, it is critical that the materials used in a dehumidifier are corrosion-resistant, or the products' lifetime will be very short. Components in comfort ventilation units are not shielded from an aggressive environment such as a swimming pool. This means that comfort ventilation and swimming pool ventilation cannot coexist.
Depending on the required lifetime, the basic material used in the dehumidifier for heat exchangers, fans, and surfaces can have different corrosion classes. It is suggested that the primary material be aluminium or hot-dip galvanised steel that has been powder coated. The heat exchangers should be made of epoxy-protected and coated aluminium. Evaporators and condensers, in particular, require adequate protection, first with an epoxy primer and then with a top coating. In general, the only materials suitable for swimming pool environments are galvanised steel or powder coated aluminium. It is not advisable to use standard stainless steel.
CtrlTech's swimming pool dehumidifiers come standard with EN/ISO 12944-2 protection class C4 ratings.
The standard practise used to be to replace the air in a pool by new air. Outdoor air is good for comfort, but heating the new air costs energy. Increased energy prices and awareness of the consumption of energy have led to increased energy saving – and dehumidification included. Therefore, it is important today to recycle as much air or to regenerate heat in heat exchangers as possible. In principle, an indoor pool could be dehumidified by using condensing dehumidifiers or dehumidifiers for ventilation.
A list of basic characteristics is provided below to assist you in determining which type of dehumidifier is best for you.
|Easy to install and use||Generates heat|
|Low investment||Can only take a limited volume of outdoor air|
|Optimal regulation of humidity and temperature||Cannot be used when the outdoor air is more humid than the indoor air.|
|Up to 100 % outdoor air||Higher investment than the condense dehumidifier|
|Free cooling Active cooling option||Requires more space than the condense dehumidifier|
Many different types of dehumidifier exist, but a dehumidifier swimming pool is specifically designed to deal with the high moisture levels in the indoor pool lobby. Within a dehumidifier, the technology is similar to the one used in cooling and in heat pumps. This is why many swimming pool heat pump manufacturers also dehumidify the swimming pool.
The dehumidifier consists of large metal plates cooled through a gas compressor by refrigerant gas. The cold plates enhance the humidity in the air, and the condensation drips the plates down to a collecting tank. The dehumidifier has a moisture status just like a heater with a thermostatic to regulate the temperature so the owner keeps moisture correct.
In the past, the standard practise of controlling humidity was to replace the air from the outside in an indoor pool area with fresh air. Outdoor air is good for comfort, but heating the new air is costly when it comes to consuming energy.
Increased energy prices and awareness about energy consumption led to increased energy efficiency, including when it came to dehumidification. This led to the major focus today on recircuiting or heat recovery in heat exchangers as much air as possible.
An indoor swimming pool can generally be dehumidified in two ways: with a dehumidifier or ventilator.
A dehumidifier, which circulates the air and condenses the water by using an evaporator spool, is often used for small pools in private homes, hotels or spa centres. This dehumidifier is known as a dehumidifier for coolant.
A dehumidifier includes a fan, a cooling unit and an outdoor air intake, when necessary. The cooling device is made of a condenser, evaporator and compressor.
Ducted dehumidifier with high capacity is first and foremost available. A larger compressor and coils are included. Thus up to 1200 litres per day is available. The physical size of the duct unit is smaller than portable for the given capacity. Most dehumidifier ducts may also be mounted over a ceiling or mounting wall. Therefore, inside the room saves space.
For indoor pool rooms, saving space is vital. Air must pass over the buckets of the dehumidifier mounted on the duct to remove moisture. The unit's airflow capabilities decide how much air the system can handle. High airflow capacity means that more air can be handled at once. It can therefore serve a wider area. The pipe can be fan and spiral larger. As a consequence, the airflow can be higher.
It is adapted to small indoor pools. Situated on the wall, it saves room. For a pool of less than 50 square metres these units have been preferable. It's available in metal and plastic boxes.
The unit comes with wall brackets. Likewise, some models also have a remote control. Swimming pool Wall mount dehumidifiers have a narrow design.
Wall across the unit on the back of the wall. So the only grill that can be seen inside the pool rooms is discharge or intake. The system functions quietly. The owners prefer it, because of its elegant appearance, but it is expensive.
When calculating moisture load from a swimming pool, three factors need to be taken into account.
The calculation can be performed according to different formulas for evaporation from the pool. CtrlTech uses VDI 2089, the normal standard in Europe, from the German guideline.
Moreover, air circulation in small private pools, more than the level of activity in the pool, often defines the need for dehumidification.
In calculating evaporation from the pool, the following factors are used: