Choosing a Replacement Indoor Pool Dehumidifier: Key Factors and Features

Indoor pool dehumidification

Every indoor pool facility is different, requiring its own specialized system to meet the needs of its guests. But even the best dehumidification system will eventually go beyond its useful life and require replacement.

Maybe you have a system that works and you want to maintain that while making modern upgrades. Maybe you’re unhappy with your indoor pool dehumidification system and you’re looking to find something better.

Whatever led you to pursuing a replacement dehumidifier, we’re here to help you find the perfect solution for you. When purchasing a replacement indoor pool dehumidifier, there are several factors and features to keep in mind so you get the right option for your needs.

Key Considerations when Choosing a Replacement Indoor Pool Dehumidifier

Pool Size and Humidity Load

Calculate the volume of the pool room, including the height of the ceiling, to determine the overall air volume that needs dehumidifying. You’ll also need to account for the evaporation rate of the water in the pool. This helps determine how powerful the dehumidification system needs to be. The larger the pool surface, the higher the evaporation rate, leading to increased humidity.

Higher water and air temperatures increase evaporation rates. Frequent pool use also raises humidity levels.

Dehumidification Capacity

Measured in pints per day (ppd), this indicates how much moisture the unit can remove from the air. A dehumidifier should be capable of handling the maximum expected humidity load. Calculate this by considering the evaporation rate from the pool and any additional sources of moisture. For larger indoor pools, commercial-grade units with higher ppd ratings may be necessary.

Airflow rate, measured in cubic feet per minute (CFM), represents the amount of air passing through a single point in one minute. CFM is another important measurement when considering ventilation needs. A higher airflow rate ensures faster moisture removal and more efficient air circulation.

Installation Requirements

Make sure the dehumidifier unit you’re looking at fits in the available space. Some systems are designed specifically for indoor or outdoor use, for example. Before you buy, triple-check that your system will fit in the space you have available.

Proper ventilation is also key for the dehumidifier to function efficiently. Will additional vents and ductwork be required for your desired unit? If so, then that work should be factored into the unit’s cost – which may make it the wrong choice for your needs.

Maintenance and Durability

Choose a dehumidifier with easy access for maintenance and parts that are easy to replace. Units with features like washable air filters and accessible drainage systems simplify upkeep. The primary way to prevent ongoing service costs is to ensure the unit is constructed from corrosion-resistant materials, given the high humidity and potential exposure to pool chemicals. Units with stainless steel or coated aluminum components resist corrosion better in humid, chlorinated environments.

Control Systems and Features

Better controls, whether through precise humidistats or other mechanisms, mean more comfortable pool environments. They also make it simpler to lower energy costs, giving you control over when the dehumidification unit runs.

A few modern indoor pool dehumidifiers also offer remote monitoring systems through apps and other tools. Seresco units feature remote control and monitoring via WebSentry, making it easier to manage pool conditions.

Operating Cost

Replacing an indoor pool dehumidifier can be costly up-front. While it’s tempting to go with the most affordable option, that may not be the best choice in the long run.  Poorly constructed units may be cheaper, but they can result in countless service visits and may need to be quickly replaced themselves. Lower capacity units tend to be more affordable, but they may not have the output needed to keep moisture from gathering in your building. That can lead to massive construction and repair costs.

Energy efficiency, durable materials, and simple installation processes can all make a dehumidification unit more expensive at the on-set. Each of these features can save you substantial money in the long term, whether by keeping the unit in good working order as it ages or simply cutting your energy costs. When it comes to replacement indoor pool dehumidifiers, an early investment in a high-quality system always pays off.

In the market for a replacement indoor pool dehumidifier? Seresco can help!

Seven Signs it’s Time for a Replacement Indoor Pool Dehumidifier

indoor pool competition duhmidification

Indoor pool dehumidifiers are essential to maintain air quality, protect infrastructure, and ensure the comfort of pool guests. Like any mechanical system, dehumidifiers have a finite lifespan and will eventually need to be replaced.

Knowing when it’s time to replace an indoor pool dehumidifier can be difficult and present a cost that may seem too much to bear, at first. But replacing a failing system when needed can create more savings in the long term.

So, how do you know when your indoor pool dehumidification system needs a refresh?

Signs That an Indoor Pool Dehumidifier Needs Replacement

1. Reduced Efficiency and Performance

If your dehumidifier is no longer maintaining the desired humidity levels despite regular maintenance, it’s a clear sign of declining efficiency. If your system can’t keep up with your dehumidification needs, you run the risk of excess condensation causing structural damage to your facility.

A dehumidifier that turns on and off more frequently than usual, or runs continuously without achieving the set humidity level, is another sign that your system is struggling to keep up. This can lead to much higher energy bills as your dehumidification unit works overtime to keep humidity down.

2. Increased Energy Consumption

A noticeable increase in energy consumption without a corresponding increase in dehumidification suggests that the unit is working harder than it should. Older units often become less energy efficient as they age.

Look at your energy bills and see if they’ve increased over the past few months. If so, it could be a sign that your dehumidifier is aging out of use.

3. Excessive Noise and Vibrations

New or excessive noise during operation, such as clanking, rattling, or buzzing, can indicate mechanical wear and tear. These sounds often point to internal components that are failing.

New or recurring vibrations can signal that the internal components are out of balance or deteriorating. If this happens once, service and parts replacement can likely fix the issue. But a recurring issue means that there’s something in your dehumidifier that’s malfunctioning.

4. Visible Wear and Tear

Indoor pool environments are highly corrosive due to chlorine and moisture in the air. Visible corrosion on the dehumidifier’s components, such as the coils and housing, can compromise its efficiency and structural integrity.

Cracks, dents, or other physical damage can also affect the unit’s performance. Some of these may be beyond repair or causing persistent mechanical issues.

5. Frequent Repairs

Constant Breakdowns: If the dehumidifier requires frequent repairs and servicing, the cumulative cost might approach or exceed the price of a new unit. Multiple repairs in a short period indicate that the system is nearing the end of its useful life.

Unavailable Parts: For older models, finding replacement parts can become difficult or impossible, making repairs impractical.

6. Air Quality Issues

Persistent mold and mildew growth around the pool area suggests that the dehumidifier is not effectively controlling humidity levels. This is a potential health hazard, so it’s important to address this issue quickly.

A musty smell is another potential sign of high humidity and poor air circulation, indicating that the dehumidifier is not functioning properly. This can be unpleasant for guests in the short term, but it may be a sign of an impending, much more serious mold issue.

7. The Age of the Unit

The average lifespan of a pool dehumidifier is around 10-15 years, depending on usage and maintenance. Units nearing this age should be closely monitored for the aforementioned signs.

Newer models often come with improved energy efficiency, better performance, and advanced features such as digital controls and smart home integration. Upgrading to a modern indoor pool dehumidification unit can offer long-term savings and improved comfort.

For more, check out our guide to Choosing a Replacement Indoor Pool Dehumidifier.

The Basics of Indoor Pool Water and Facility Temperature Control

Maintaining temperature in an indoor pool – both in the water and the facility itself – requires a thoughtful approach to heating and ventilation systems. Any pool environment is a delicate balance of cycles and processes, a constant dance of moving air and water that depends on multiple integrated systems.

Changes in temperature, both in the water and the surrounding air, can have dramatic effects on your dehumidification system. As the temperature increases, so does the evaporation rate of the pool’s water, which means more excess moisture that your dehumidifier will need to pull from the air. Maintaining a steady, comfortable temperature can help mitigate this, keeping the climate of your indoor pool less humid and more comfortable for guests without straining your dehumidification unit.

In this article, we’ll explore different strategies for controlling the temperature of an indoor pool facility and the pool water together. To do this, we’ll list just some of the many systems that can work together to create a pleasant, healthy swimming environment and provide a brief explanation for each one.

Pool Water Temperature Control Systems

Conventional Water Heating Systems

Gas Heaters: Gas heaters use natural gas or propane to heat water. They are quick to heat but may incur higher operational costs due to energy consumption.

Electric Heaters: These heaters convert electrical energy into heat. While they are easy to install and operate, they can also consume substantial energy.

Oil Heaters: Oil heaters use heating oil to warm the pool water. They are effective but may require more maintenance, which leads to them being far less common than other heating solutions.

Heat Pumps

Air-Source Heat Pumps: These pumps extract heat from the surrounding air and transfer it to the pool water using a refrigerant cycle. While they are very energy efficient, they tend to struggle with output.

Geothermal Heat Pumps: Utilize stable ground temperatures to heat the pool water. They are highly efficient, but can be costly to install and maintain, often requiring a specialist technician and unique parts.

Solar Heating Systems

Solar Panels: Solar panels capture sunlight and convert it into energy and heat for indoor pools. This method is becoming increasingly popular, as it’s both environmentally friendly and can significantly reduce operating costs over time.

Pool Covers: These pool covers trap heat from sunlight and prevent evaporation. This helps retain warmth and reduce the amount of excess moisture in the air.

Heat Exchangers

Plate Heat Exchangers: This method uses a boiler or other primary heat source to transfer heat to the pool water without direct contact. They can be very energy efficient, being able to derive power from different kinds of energy sources.

Common Methods of Pool Facility Temperature Control

HVAC Integration: Coordinate pool heating systems with building HVAC systems to maintain consistent indoor air and water temperatures, as well as controlling ventilation and regulating air quality.

Smart Controls: Utilize smart technology to remotely monitor and adjust pool temperature settings for optimal comfort and energy efficiency. Using tools like Seresco’s WebSentry can give pool operators unparalleled, integrated control of the pool environment from anywhere.

Variable Speed Pumps: These systems allow operators to control water flow rates to optimize heating efficiency and maintain consistent temperatures.

Insulation: Proper insulation of pool walls, floors, and ceilings can minimize heat loss and improve energy efficiency. This can also create less variability in room temperatures, which can make evaporation and humidity more predictable and steadier.


Want to talk to an expert about your indoor pool dehumidification needs? Contact us today!

8 Quick Tips for Creating an Effective Indoor Pool Dehumidification System

Indoor pools offer year-round enjoyment, but they also come with unique challenges, particularly in managing humidity levels. An effective indoor pool dehumidification system is crucial for maintaining a comfortable and safe environment.

If you’re new to maintaining an indoor pool or just looking for a quick-and-easy checklist for your design project, here are 8 tips to keep in mind whenever you’re creating an indoor pool dehumidification system.

Tips for Creating the Ideal Indoor Pool Dehumidification System

Size Matters

Accurately sizing your dehumidification system based on the dimensions of your indoor pool area and the rate of evaporation are critical to creating a comfortable pool environment. Factors such as pool size, water temperature, and room temperature will impact the system’s capacity requirements.

Consulting with a professional engineer can ensure that the system is appropriately sized for your specific needs – but you can get started yourself by calculating evaporation rate and measuring dimensions of the pool space. This is essential information to determine the necessary output and power of your indoor pool dehumidifier system.

Ventilation and Airflow

Air refrigeration is only one part of the dehumidification process. Proper ventilation and air exchange is essential to maintaining air quality and preventing the buildup of moisture. Good air circulation helps distribute conditioned air evenly and prevents stagnant areas where humidity can accumulate. Without adequate air circulation, your dehumidification system will struggle to clear moisture and your facility or pool room will become uncomfortable – or even unsafe.

Ensure that your pool area is designed with ventilation in mind. Your refrigeration unit and air exchange solution need to work together to keep humidity at comfortable levels.

Maintain Control over Humidity Settings

Invest in a dehumidification system that allows for precise control over humidity levels. Maintaining an optimal humidity range not only enhances comfort but also prevents issues such as condensation, mold growth, and structural damage.

Programmable controllers can be used to set and maintain specific humidity levels throughout the day. Advanced control software can make this process much easier for indoor pool operators, as well. Seresco’s WebSentry technology allows for even more precise control and support from anywhere with an internet connection.

Buy Energy-efficient Systems

Designing an energy-efficient dehumidification system will save you money and keep your pool facility eco-friendly. Even if the upfront costs are greater, consider the long-term cost-savings when purchasing a dehumidification unit. In many cases, the energy savings will outweigh those initial costs before long.

Look for systems with advanced technologies such as variable-speed compressors, heat recovery options, and fluid cooled units or dry coolers. These features can significantly improve energy efficiency without compromising performance.

Use Pool Covers and Enclosures

Pool covers and other enclosures can reduce evaporation and limit the introduction of external moisture. These measures can work in tandem with your dehumidification system, helping to maintain consistent humidity levels and lower energy consumption. This simple solution can result in less strain on your dehumidifier, saving money in energy consumption and wear.

Make a Plan for Regular Maintenance

A well-maintained dehumidification system operates more effectively and has a longer lifespan. Implement a regular maintenance schedule, including filter replacements, coil cleaning, and inspections. Timely maintenance not only ensures optimal performance but also prevents potential issues before they escalate.

Ongoing maintenance is important to consider during the initial purchasing and design process, as some systems will be easier and less costly to maintain than others. Seresco indoor pool dehumidification systems are built with maintenance in mind, with parts that are easy and affordable to replace and service.

Consider the Surrounding Spaces

Indoor pools are often part of larger facilities, such as fitness centers or hotels. Ensure that your dehumidification system accounts for the surrounding spaces, providing comfort and humidity control in adjacent areas. This holistic approach contributes to a positive overall experience for facility users.

Call in the Experts

When in doubt, seek the expertise of professionals in the field of indoor pool design and dehumidification. Consulting with the engineers and indoor pool dehumidification specialists at Seresco can help you navigate create an effective system tailored to your unique requirements.

To learn more about how Seresco can help you with your indoor pool dehumidification system, contact us.

A Guide to Choosing the Right Size Dehumidifier for Your Indoor Pool

Indoor pools provide a year-round oasis, but they also come with challenges, such as excess humidity. To maintain a comfortable and safe environment, investing in a dehumidifier is essential. However, selecting the right size is crucial for efficient performance. In this guide, we’ll explore the factors to consider and steps to take to ensure you choose the best size dehumidifier for your indoor pool.

What to Consider When Sizing Your Indoor Pool Dehumidifier

Calculate Pool Area

The size of the indoor pool directly influences the capacity needed for a dehumidifier. Measure the length and width of the pool room and multiply these dimensions to determine the square footage. This basic calculation serves as a starting point for choosing the appropriate dehumidifier capacity.

Consider Pool Activity

Different pool activities generate varying levels of humidity. For example, a lap pool used primarily for swimming may require a smaller dehumidifier than a pool used for water aerobics or a hot tub. Consider the frequency and intensity of pool usage to better estimate the dehumidification needs.

Account for Surrounding Spaces

Indoor pool areas are often accompanied by adjacent spaces, such as changing rooms, showers, and storage areas. These spaces contribute to the overall humidity load. Measure and calculate the square footage of these areas to ensure the dehumidifier can handle the combined moisture output.

Calculate Evaporation Rate

To measure how quickly water evaporates into your pool room’s air, measure the distance between the pool deck and the surface of the water. Then, let some days pass to allow water to evaporate as normal. Take the same measurement again in the same spot as before.

Divide the difference between the measurements by the number of days that have passed to get an approximation for inches/centimeters of water evaporated per day. Convert that to square feet or meters per day and multiply that value by the surface area of your pool. Then multiply that number by 7.48 to arrive at gallons of water evaporated each day. This measurement is essential to accurately sizing any indoor pool dehumidifier.

Factor in Pool Temperature

The temperature of the pool water affects the humidity level in the air. Warmer water temperatures result in higher humidity. Be sure to consider the desired pool temperature when selecting a dehumidifier, as it influences the unit’s capacity to effectively remove moisture.

Determine Desired Humidity Level

Understanding the ideal humidity level for an indoor pool is crucial. Most indoor pools aim for a humidity level between 50% and 60%. Choose a dehumidifier with the capacity to maintain this range to prevent issues such as condensation, mold growth, and discomfort for pool users. Other facilities may have to comply with building codes or other regulations, as well.

Consult Dehumidifier Sizing Charts

Dehumidifier manufacturers often provide sizing charts that correlate pool size, temperature, and humidity levels to the appropriate unit capacity. Consult these charts to narrow down your options and ensure a proper match between your indoor pool’s characteristics and the dehumidifier’s capabilities.

Seek Professional Advice

When in doubt, seek advice from professionals specializing in indoor pool dehumidification. They can assess your specific circumstances, recommend suitable units, and provide valuable insights into installation and maintenance requirements.

Choosing the right size dehumidifier for your indoor pool can be a tricky process. If you’re struggling to find the right solution for your indoor pool, contact us today to speak with a professional. We’ll help you create a comfortable and healthy environment while protecting the structure from potential damage caused by excess humidity.

How Indoor Pool Dehumidifiers Work

Compressor wall technology

Indoor pools provide a luxurious and comfortable environment for swimming, but they also present a unique challenge: excess humidity. High humidity levels in indoor pool areas can lead to discomfort, damage to the building structure, and health issues. This makes choosing the right indoor pool dehumidification system essential to any natatorium, residential pool, or aquatic facility.

Understanding the basics of indoor pool dehumidifier systems can make finding the right solution for your indoor pool much easier. Here’s a simplified overview of what makes indoor pool dehumidifiers work so you can be more informed throughout the process.

The Basics of Indoor Pool Dehumidifiers

Indoor pool dehumidifiers operate based on the principles of refrigeration and air exchange. The primary goal is to extract excess moisture from the air, ensuring a balanced and comfortable humidity level within the enclosed space. They accomplish this through several different processes that work together to maintain comfortable humidity levels.

Refrigeration Cycle

Most indoor pool dehumidification systems use a refrigeration cycle to remove moisture from the air. The refrigeration cycle is typically driven by a mechanical process that uses ventilation and compressors to move air. Compressor-based dehumidifiers have the highest output of any refrigeration system, making them the perfect solution for most indoor pool environments.

The process begins with the intake of warm and humid air from the pool area. This air passes through a set of evaporator coils inside the dehumidifier.

As the warm air comes into contact with the cold evaporator coils, the moisture in the air condenses into water droplets. This condensed water is collected in a drain pan or a separate reservoir within the dehumidifier. The now drier and cooler air is then reheated before being released back into the pool area.

This process on its own often isn’t enough to fully cover a pool’s dehumidification needs, which is why there’s another equally important part of the process to consider.

Air Exchange

In addition to the refrigeration cycle, indoor pool dehumidifiers incorporate an air exchange system. This involves bringing in fresh, outdoor air to dilute the indoor air and further reduce humidity levels. The dehumidifier constantly monitors the humidity and temperature levels, with air exchange rates controlled by the system or manually designated by users.

The combination of the refrigeration cycle and air exchange ensures that the indoor pool environment maintains a comfortable humidity level without compromising on air quality.

Other Systems That Help Indoor Pool Dehumidifiers Work Well

Indoor pool dehumidifiers often work in conjunction with other systems and equipment to ensure optimal performance and energy efficiency. Some key interactions include:

HVAC Systems: Dehumidifiers are integrated with heating, ventilation, and air conditioning (HVAC) systems to regulate both temperature and humidity levels. This collaboration ensures a balanced and controlled indoor environment.

Pool Covers and Enclosures: Using pool covers and enclosures can minimize water evaporation, reducing the load on the dehumidifier. Proper pool cover usage enhances the overall efficiency of humidity control systems.

Monitoring Systems: Dehumidifiers can be connected to various applications for centralized monitoring and control. Systems like Seresco’s WebSentry technology allow operators to adjust settings, receive alerts, and optimize the performance of the dehumidification system from anywhere.

We’re Here to Help

Indoor pool dehumidifiers play a crucial role in maintaining a comfortable and safe environment for swimmers while protecting the building structure. If you’re looking for help with your indoor pool project, contact us to learn more about the innovative technology and energy efficiency that make Seresco Dehumidifiers the definitive choice in indoor pool dehumidification.

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.