Controlling Humidity in Indoor Swimming Pools: Achieve Comfort & Maximize the Energy Efficiency

Indoor swimming pools offer year-round enjoyment, shielding swimmers from the elements and providing a controlled environment regardless of the weather outside. However, maintaining optimal humidity levels within these enclosed spaces is essential for ensuring comfort, preserving the building structure, and promoting energy efficiency. This article explores the significance of humidity control in indoor swimming pools and the role of advanced HVAC systems, such as Damvent dehumidification hybrid Air Handling Units (AHUs), in achieving this goal.


The Importance of Humidity Control

Humidity control is critical in indoor swimming pool environments due to the high levels of moisture generated by evaporation from the pool water and the activities of swimmers. Without proper regulation, excessive humidity can lead to a host of issues, including:

1. Comfort Concerns: High humidity levels can create a muggy and uncomfortable atmosphere for swimmers and spectators, affecting their overall comfort and experience.

2. Health Risks: Elevated humidity can contribute to the growth of mould, mildew, and bacteria, posing health risks to occupants and potentially exacerbating respiratory conditions such as asthma.

3. Structural Damage: Excess moisture can cause corrosion of metal components, deterioration of building materials, and damage to interior finishes, leading to costly repairs and maintenance.

4. Energy Loss: Uncontrolled humidity can increase the workload on HVAC systems as they struggle to maintain comfortable conditions, resulting in higher energy consumption and operational costs.

Addressing Humidity Challenges with Advanced HVAC Solutions

To effectively manage humidity levels in indoor swimming pools, building owners and operators need robust HVAC solutions tailored to the unique requirements of these environments. Damvent dehumidification hybrid AHUs offer an innovative approach to humidity control by integrating multiple functions into a single, compact unit. Here's how these systems contribute to enhanced comfort, energy efficiency, and sustainability:

1. Precise Humidity Regulation: Damvent dehumidification hybrid AHUs utilize advanced sensors and control algorithms to monitor and adjust humidity levels precisely, ensuring optimal comfort for occupants while minimising energy consumption.

2. Energy Recovery:

Achieving an optimal microclimate in indoor swimming pools while minimizing the negative effects of high humidity requires significant energy and is quite expensive. Swimming pools consume disproportionately large amounts of energy compared to dry buildings. Water evaporation requires the supply of latent heat of vaporisation. This energy, contained in the water vapour, is lost from the building through ventilation. This energy loss far exceeds dry building losses through ventilation and conduction.

Conventional ventilation systems lose a lot of energy. With the concept solution of Damvent for precise control of the microclimate in the indoor swimming pools max.e-pool, these negative processes will be minimised. They will reach the optimal comfort for the visitors.

A conventional air-cooled heat pump uses the ambient air for the evaporation process, and during the winter, this air can reach temperatures of -10°C, -15°C or even -20°C. Extracting heat from the ambient air is an inefficient process. In comparison, max.e-pool extracts air from within the room. Under normal conditions, this air ranges in temperatures from 20÷24°C. Firstly, 60÷65% of the heat is recovered in the plate heat exchanger, and then at a temperature between 4÷10°C, the air enters the evaporator of the heat pump, thus recovering the other 30÷35%. Using this method, we achieve a COP system of 10 and avoid frost formation on the evaporator (which commonly occurs in all conventional heat pumps).

According to EN14825, the highest Energy Efficiency Class for Heat Pumps is A+++ with a SCOP=3.75 (high temperature) -4.38 (low temperature). With a SCOP=3.8÷6.5 (of the refrigerant circuit) and a COPnet of the whole system SCOPnet= 5÷15, max.e-pool is far ahead of the competition.

Note *SCOPnet- seasonal efficiency of a unit in active heating mode, without supplementary electric heaters, determined from mandatory conditions given in this EU standard and used for marking, comparison and certification purposes.

COPnet = Q plate heat exchanger + Q heat pump                             N fans + N compressor Where:       1. Q plate heat exchanger - recovered heat in the rotary heat exchanger (kW)       2. Q heat pump - heating capacity of the condenser of the heat pump (kW)       3. N fans - energy consumption of both (supply and exhaust) fans (kW)       4. N compressors - energy consumption of the compressors (kW)

4. Modular Design: Damvent AHUs are designed for flexibility and scalability, allowing easy integration into new construction projects and existing swimming pool facilities. Their modular design enables customization to meet specific capacity and space requirements, ensuring optimal performance and efficiency.


Maintaining proper humidity levels is essential for indoor swimming pool environments' comfort, health, and sustainability. Advanced HVAC solutions, such as Damvent dehumidification hybrid AHUs, are crucial in achieving effective humidity control while maximising energy efficiency and indoor air quality. Building owners and operators can create a more comfortable, sustainable, and inviting swimming experience by investing in innovative HVAC technologies.

Damvent offers a range of dehumidification hybrid AHUs specifically designed for indoor swimming pool applications, providing comprehensive humidity control solutions tailored to the unique needs of these environments.

Visit our website to discover our industry-leading dehumidification hybrid AHU solution, the max.e-pool, and take the first step towards ensuring optimal humidity control in your indoor swimming pool. Contact us today via our website's form to discuss how this tailored solution can meet your specific needs:

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