Popular Design Approaches for Indoor Pools and Natatoriums

indoor pool dehumidification residental pool

The design of indoor pools and natatoriums requires a delicate balance between aesthetics, functionality, and the unique environmental challenges posed by the aquatic setting. Whether in a private residence, a community center, or a commercial facility, architects and designers have embraced various approaches to create stunning and efficient indoor pool spaces.

These are just a few popular design considerations that contribute to the success of indoor pool and natatorium projects.

Design Techniques for Indoor Pools and Natatoriums

Daylight Integration

One prevalent design approach focuses on maximizing the use of natural light. Large windows, skylights, or even glass walls are incorporated to bring in abundant daylight, creating a bright and inviting atmosphere. This not only enhances the visual appeal but also reduces the reliance on artificial lighting, contributing to energy efficiency.

Depending on your climate, sunlight may also naturally increase the temperature inside the indoor pool or natatorium. That can affect the comfort of the indoor pool area, or even contribute to the evaporation rate of water in the pool. It’s important to account for this, if needed, when choosing a dehumidification solution so that your indoor pool remains comfortable and safe year-round.

Ventilation and Humidity Control

Indoor pools come with the challenge of high humidity levels and potential issues related to poor ventilation. Successful design approaches prioritize efficient ventilation systems that control humidity, improve air quality, and prevent structural damage caused by moisture. This is crucial for the comfort of pool-goers and the longevity of the building.

Humidity control is also vital to the health of your visitors. Excessive humidity can lead to poor quality air in the pool facility, even causing mold and mildew to form and circulate through the building. This can be very hazardous, especially when left unchecked. Every sound indoor pool design must account for humidity. Check out our deep dive into popular natatorium designs for more common ways of addressing air quality.

Flexible Spaces and Multipurpose Design

To enhance the functionality of indoor pool areas, designers often adopt a flexible and multipurpose design approach. This involves creating spaces that can easily transition from swimming areas to recreational zones, fitness spaces, or event venues. Retractable enclosures, movable partitions, and versatile furniture allow for adaptability, making the most of the available space.

This requires a facility that addresses the needs of each distinct function. Pool dehumidification and ventilation will be key, but so will maintaining comfortable air for whatever other uses the building may have. These need to be anticipated from the on-set of the project so a facility can be created to meet your needs.

Integration of Water Features

Innovative design approaches often include the integration of various water features beyond the main pool. Waterfalls, fountains, and splash pads contribute to a dynamic and visually appealing environment. These features not only enhance the aesthetics but also provide sensory experiences, creating a more immersive atmosphere for visitors.

These water features typically rely on specialized pumps or other machinery to create the desired effect. It’s best to plan ahead for these, as well, knowing that any equipment will need to work in tandem with other pool systems.

Accessibility and Inclusivity

Designing indoor pools with a focus on accessibility and inclusivity is a growing trend. This involves incorporating features such as ramps, lifts, and zero-entry access points to accommodate individuals with varying levels of mobility. Additionally, creating spaces for therapeutic activities and programs contributes to a more inclusive and community-oriented facility.

Energy-Efficient Technologies

Sustainability is a key consideration in modern design approaches. Energy-efficient technologies, such as solar heating, LED lighting, and advanced HVAC systems, are incorporated to minimize the environmental impact of indoor pool facilities. These technologies not only reduce operational costs but also align with the growing demand for eco-friendly design solutions.

Sustainable indoor pool dehumidifiers are also growing in popularity, as they typically account for a sizeable, regular energy cost. Using a sustainable dehumidification system can make a big impact on energy efficiency, saving money and creating less strain on the environment.

Learn more about indoor pool and natatorium design with Seresco’s Natatorium Design Guide. Contact us today to find the right dehumidification solution for your indoor pool.

Controlling Humidity in an Indoor Pool or Natatorium

indoor pool dehumidification comeptition pool

Maintaining the right humidity levels in indoor pools and natatoriums is crucial for the comfort, health, and safety of the occupants as well as the structural integrity of the building. Thankfully, there are several methods and technologies that can help keep humidity within acceptable levels. We’ve created this basic primer to get you started as you plot out your own natatorium design.

Understanding Humidity

Humidity refers to the amount of moisture present in the air. It is typically measured as relative humidity (RH) and is expressed as a percentage. The ideal indoor pool humidity level falls between 50% and 60%. This range ensures a comfortable environment for swimmers and prevents issues like condensation, mold growth, and structural damage. Humidity can be calculated using a hygrometer, a device that measures the moisture content in the air.

Methods for Controlling Indoor Pool Humidity

Ventilation Systems

Proper ventilation is fundamental in controlling humidity. Mechanical ventilation systems, including exhaust fans and fresh air intake, ensure that stale, humid air is constantly replaced with fresh, dry air from outside. Heat recovery ventilation (HRV) systems are also utilized to minimize heat loss during the ventilation process.

Dehumidification Equipment

Dehumidifiers are specifically designed to remove excess moisture from the air. There are two main types: desiccant dehumidifiers and refrigerant dehumidifiers. Desiccant dehumidifiers absorb moisture using a drying agent, while refrigerant dehumidifiers cool the air, causing moisture to condense and be removed.

Pool Covers and Enclosures

Using pool covers when the pool is not in use can significantly reduce evaporation, limiting the introduction of moisture into the air. Enclosing the pool area with a retractable roof or high-quality glass walls can further control humidity levels by preventing outside air and moisture from entering the natatorium.

Proper Pool Water Temperature

Maintaining the pool water temperature within an appropriate range can minimize evaporation rates. Warmer water evaporates more quickly, increasing humidity, while cooler water reduces this effect.

Design Considerations

Architectural and engineering designs play a vital role in humidity control. Ensuring adequate space between the pool surface and the roof, using non-corrosive building materials, and incorporating proper insulation can prevent condensation and structural damage caused by high humidity levels.

Recommended Systems for Indoor Pool Humidity Control

1. Air Handling Units (AHUs)

AHUs are HVAC units equipped with advanced controls for managing temperature, humidity, and air quality. They regulate the air circulated within the natatorium, ensuring a comfortable environment for swimmers.

2. Pool Water Treatment Systems

Effective water treatment systems help maintain the pool water chemistry, preventing the formation of chloramines—a common source of unpleasant pool odors. Controlling chloramines and trichloramines lessens the need for excessive ventilation and dehumidification.

3. Humidity Control Sensors

Installing humidity sensors linked to the HVAC system allows for real-time monitoring and automatic adjustments. These sensors can activate ventilation, dehumidification, or heating systems as needed, ensuring consistent humidity levels.

This is just an introduction to the many complex factors that influence humidity in natatoriums. If you’d like to learn more, check out our comprehensive Natatorium Design Guide for more on indoor pool humidity control.


How to Design a Natatorium

Designing a natatorium is a highly complex task. From architectural aesthetics to technical specifications, creating a natatorium that is functional, visually appealing, and safe for users requires careful planning and attention to detail.

There’s no one-size-fits-all process that can guide every natatorium project. There are, however, a few issues that every indoor pool facility will need to eventually address. We’ve assembled a short list here as a very basic starting point. If you’re looking for a more comprehensive breakdown, check out our in-depth Natatorium Design Guide.

The Basics of Natatorium Design

Creating a functional space

Designing the layout of your indoor pool facility is about more than just appealing spaces for visitors. There are numerous regulations to bear in mind related to accessibility and overall safety.

Remember that natatoriums demand a great deal of space dedicated to behind-the-scenes functions. Filtration, humidity control, ventilation, and other key systems need to be considered early in the process.

Where will these systems be placed? Does the layout offer suitable space for installation and ongoing maintenance? Answering these questions early can spare you significant headaches and surprise costs down the road.

Managing humidity

Maintaining the right humidity level is crucial in a natatorium. High humidity can lead to discomfort, structural damage, and health issues. There are strict guidelines to help guide natatorium engineers in maintaining comfortable humidity levels.

Invest in high-quality dehumidification systems specifically designed for indoor pool environments. These systems are designed to remove excess moisture from the air, maintaining the humidity at a comfortable level. An expert dehumidification partner will be able to assess your facility and find the best system to suit your needs.

You’ll also need to implement a robust ventilation system that continuously brings in fresh outdoor air and exhausts the humid indoor air. Proper ventilation helps in controlling humidity and ensures a steady supply of oxygen for swimmers.

Maintaining good air quality

Indoor pools are prone to poor air quality due to the presence of chlorine fumes, chemical vapors, and other pollutants. With the right systems in place, you can anticipate and address this issue. This is critical to the process, as many of these chemicals can negatively affect visitor’s health and safety.

Chloramines, formed by the reaction of chlorine with organic substances, can cause respiratory problems. Use ultraviolet (UV) or ozone-based systems to break down chloramines, ensuring a healthier environment.

The American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) recommends a 4-6 volumetric air changes per hour in a natatorium (6-8 for stadiums with audiences present). Your air circulation system needs to be able to keep up with that level of airflow to keep the environment safe and comfortable.

Controlling condensation

Condensation can damage building materials and affect overall air quality. There are a few ways to address this issue as part of your natatorium’s design.

First, properly insulate the natatorium to maintain consistent indoor temperatures. Insulated walls and ceilings help prevent temperature differences that can lead to condensation on surfaces.

Using the right materials for ventilation ductwork can also make an impact. Stainless steel, for example, is weakened by chlorine, so its best to avoid using it to build your ventilation system. Galvanized steel and fabric ducts are both good choices for condensation control.

There are many aesthetic and architectural choices that can also affect condensation control. For example, large skylights casting sunlight on your pool may look nice but keeping skylights clear of condensation requires substantial airflow. This doesn’t mean that you can’t use skylights, just that they need to be accounted for in the design.

From a technical standpoint, this is just the most basic summary of what designing a natatorium demands. Designing a natatorium requires a holistic approach that addresses all these factors and others.

By investing in high-quality systems, indoor pool facilities can offer a pleasant and safe experience for swimmers and visitors alike. Regular maintenance and monitoring play a vital role in sustaining the effectiveness of these measures, ensuring the longevity and efficiency of the natatorium.

For more detailed information, check out our Natatorium Design Guide.

Need help with your natatorium design? Contact our experts today!

Maintaining Air Quality in an Indoor Pool

indoor pool dehumidification hotel pool

Indoor pools, or natatoriums, provide a year-round opportunity for recreational and competitive swimming. However, ensuring the safety and comfort of occupants in these enclosed spaces requires vigilant attention to air quality. Poor air quality in indoor pools can result in health issues, discomfort, and damage to the facility.

Air Quality Standards for Indoor Pools and Natatoriums

Several organizations, such as the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) and the World Health Organization (WHO), have established guidelines to ensure safe air quality in indoor swimming facilities. The primary concern is the presence of chloramines, which are formed when chlorine reacts with organic substances, such as sweat and urine, in the water. High levels of chloramines can lead to respiratory and eye irritation, as well as other health problems.

ASHRAE Standard 62.1-2019 specifies ventilation rates for indoor pools based on the pool area, occupancy, and water surface area. The standard emphasizes the importance of effective ventilation to remove contaminants and maintain acceptable indoor air quality. Additionally, maintaining proper water chemistry, including chlorine levels and pH, is crucial to minimizing the formation of chloramines.

ASHRAE recommends:

  • 4-6 volumetric air changes per hour in a regular natatorium
  • 6-8 volumetric air changes per hour in spectator areas

A quick calculation will determine the supply air requirement:

Supply air required (CFM) = room volume (ft3) x desired air changes / 60

The room volume determines the amount of supply air a space requires.

How to Maintain Safe Air Quality in Indoor Pools and Natatoriums

Effective Ventilation Systems

Investing in a high-quality ventilation system is paramount for maintaining safe air quality in an indoor pool. The system should be designed to provide sufficient air exchange rates, removing contaminants and controlling humidity levels. Regular maintenance and inspection of ventilation equipment are essential to ensure optimal performance.

Proper Pool Water Treatment

Maintaining proper water chemistry is a key factor in preventing the formation of chloramines. Regular testing and adjustment of chlorine levels, pH, and other water parameters are crucial. Advanced water treatment technologies, such as UV (ultraviolet) or ozone systems, can be employed to supplement traditional chlorine disinfection and reduce the formation of harmful byproducts.

Encourage Showering Before Swimming

Establish and enforce a policy encouraging patrons to shower before entering the pool. This helps minimize the introduction of organic contaminants into the water, reducing the load on the pool’s disinfection systems.

Routine Cleaning and Maintenance

Regular cleaning of pool surfaces, surrounding areas, and ventilation ducts is essential for preventing the accumulation of dust, debris, and other contaminants. Proper maintenance of air-handling units, filters, and exhaust systems is crucial to ensure their efficiency.

Monitor Indoor Air Quality

Utilize air quality monitoring systems to continuously assess the levels of chloramines, humidity, and other pollutants in the indoor pool environment. Real-time monitoring allows for prompt identification of potential issues, enabling timely corrective actions.

Occupancy Management

Limit the number of occupants based on the pool area and ventilation capacity to prevent overcrowding. Adequate spacing between swimmers helps minimize the buildup of contaminants in the air.

Educate Staff and Patrons

Provide education and training to staff and pool users on the importance of maintaining good hygiene, the potential risks associated with poor air quality, and adherence to pool rules. Informed users are more likely to contribute to a healthy and safe swimming environment.

Maintaining safe air quality in indoor pools is crucial for the well-being of occupants and the longevity of the facility. Adhering to established standards, investing in effective ventilation systems, and implementing proactive maintenance and monitoring strategies are key components of a comprehensive approach to indoor pool air quality management. By adopting these measures, natatorium operators can create a safer and more enjoyable swimming environment for everyone.

Looking to install a new indoor pool dehumidifier or replace an existing unit? Contact Seresco today to find the right dehumidification solution for your indoor pool or natatorium.

What is a Natatorium?

indoor pool dehumidification fitness

A natatorium, often referred to as a swimming pool complex, is a specialized facility designed for aquatic activities. It can serve as a hub for swimming enthusiasts, athletes, and recreational users alike. It’s a comprehensive facility housing one or more swimming pools, along with supporting amenities such as changing rooms, showers, seating areas, and sometimes additional features like water slides, whirlpools, and saunas.

This wide range of uses makes designing a safe, comfortable natatorium a unique challenge. When it comes to dehumidification systems, natatorium design demands meticulous attention to many environmental and technological factors. create a space that is functional, efficient, and enjoyable for all.

Important Considerations in Natatorium Design

Space Utilization and Pool Configuration

Natatoriums often feature multiple pools, including Olympic-sized ones for competitions, diving pools, and smaller recreational pools. They also require specialized machinery to maintain. These are typically housed in their own separate area of the facility. Proper space allocation can make installation of dehumidification systems much simpler, ensuring that your natatorium stays comfortable for users.

Humidity Control

Maintaining a comfortable, healthy environment inside the natatorium is critical. Humidity and climate control systems are necessary to regulate temperature and maintain healthy air quality. Proper air quality not only enhances the experience but also prevents the formation of mold and mildew, which can threaten the health and safety of those using the natatorium.

Indoor Air Quality (IAQ)

There are four factors that directly influence a natatorium facility’s air quality:

  • Poor air distribution or airflow
  • Low air change rate
  • Poor outdoor air ventilation
  • Limited paths for exhaust air

Engineers account for each of these to keep the indoor air quality of a natatorium within acceptable levels. If air doesn’t circulate adequately, air quality can suffer, creating yet another health hazard for visitors.

Challenges in Natatorium Design

Designing a natatorium that’s safe for all visitors is a complex challenge.

Budget Constraints

Balancing necessary features and budget constraints can be difficult. Upkeep for dehumidifiers can be costly, particularly as systems age beyond their useful life. Designing with future updates and maintenance needs in mind can help alleviate some of these pressures. But balancing those necessary considerations with the available budget might be impossible, in some cases.

Maintenance and Sustainability

Natatoriums require regular maintenance to sustain their facilities and dehumidification systems. Ensuring the longevity of these systems while incorporating eco-friendly practices can be challenging for designers without the right resources. Meanwhile, integrating new, sustainable technologies or replacing old dehumidifiers can be an expensive process. Many natatoriums miss out on the benefits of new technologies due to poorly allocated space for dehumidification systems and budget constraints.

Regulatory Compliance

Meeting building codes, safety regulations, and health standards can be intricate. Guidelines from organizations like the World Health Organizations (WHO) must be considered during the design process. There’s always potential for new research into healthy humidity levels to change regulations. Natatorium engineers need to be ready to adapt, staying updated with local regulations and international standards to ensure the natatorium’s compliance with the law.

Technological Integration

Integrating modern technology, such as energy-efficient lighting, smart control systems, and advanced water treatment technologies, poses a challenge. While these innovations enhance the natatorium’s efficiency, incorporating them seamlessly into the design can be complex.

Designing a natatorium is a multifaceted process that demands a blend of creativity, technical expertise, and a deep understanding of the needs of diverse user groups. By addressing the considerations and challenges mentioned above, architects and designers can create natatoriums that are not only aesthetically pleasing but also functional, safe, and sustainable. These aquatic spaces, when thoughtfully designed, become more than pools. They foster health, recreation, and a sense of belonging.

Check out our in-depth natatorium design guide for a more detailed look into the fundamentals of indoor pool dehumidifier systems.

Controlling Condensation in Indoor Pools: How and Why

Condensation occurs when warm, moist air meets cooler surfaces, leading to water droplets forming on windows, walls, and other surfaces. Controlling condensation in indoor pools is crucial for maintaining a comfortable and safe environment, preventing structural damage, and ensuring the longevity of the facility.

In this article, we’ll be exploring why condensation control is so important for indoor pools and methods to manage condensation levels.

Importance of Controlling Condensation in Indoor Pools

Comfort and Safety

Excessive condensation can create a damp and uncomfortable environment for swimmers and spectators. This discomfort may discourage people from using the facility and impact their overall experience. Moreover, condensation on surfaces can create slippery conditions, posing safety risks for both swimmers and staff.

Structural Integrity

Persistent condensation can lead to structural issues within the pool facility. Water droplets collecting on surfaces over time can contribute to mold growth, corrosion, and deterioration of building materials. This not only affects the aesthetics of the facility but also compromises its structural integrity.

Air Quality

Condensation can contribute to poor indoor air quality by fostering the growth of mold and mildew. This can lead to respiratory problems and allergies among swimmers and staff. Proper control of condensation helps maintain a healthier indoor environment.

How to Manage Condensation in Indoor Pools

Dehumidification Systems

Installing dehumidification systems is one of the most effective methods for controlling condensation in indoor pools. These systems work by removing excess moisture from the air, maintaining optimal humidity levels. There are various types of dehumidifiers, including desiccant, refrigerant, and heat pump models, each with its own set of advantages depending on the specific needs of the pool facility.


Proper ventilation is essential to control humidity levels and reduce condensation. Good air circulation helps disperse moist air and prevents it from accumulating on surfaces. Mechanical ventilation systems, such as exhaust fans and air exchange systems, can be strategically placed to enhance airflow and minimize condensation.

Pool Covers

Using pool covers when the facility is not in use can help control humidity levels. Covers prevent water evaporation, reducing the amount of moisture released into the air. This simple yet effective method can significantly contribute to condensation control.


Proper insulation of walls, windows, and other surfaces can minimize the temperature differential between the indoor and outdoor environments. This, in turn, reduces the likelihood of condensation forming on surfaces. Insulating materials, such as double-glazed windows and thermal insulation panels, can be incorporated into the facility design.

Regular Maintenance

Conducting regular inspections and maintenance checks is crucial for identifying and addressing potential condensation issues promptly. This includes fixing leaks, repairing damaged insulation, and ensuring that the HVAC and dehumidification systems are functioning optimally.

Controlling condensation in indoor pools is essential for maintaining a comfortable and safe environment, preserving the structural integrity of the facility, and promoting good indoor air quality. By implementing a combination of the methods listed above, pool operators can create a welcoming and sustainable space for swimmers of all ages.