Swimming pools are a popular feature in many homes, resorts, public facilities, and fitness centers. While most people are familiar with outdoor pools, the concept of an indoor swimming pool often intrigues them. But what exactly is an indoor swimming pool called? Understanding its terminology, design, benefits, and different contexts where it applies is essential for anyone considering installation or looking to expand their knowledge about aquatic facilities.
In this guide, we will explore everything you need to know about indoor swimming pools, from naming conventions to design variations, construction considerations, legal standards, and health benefits. Whether you’re a homeowner, architect, or simply a swimming enthusiast, this article aims to provide valuable, detailed, and SEO-optimized information.
Understanding the Terminology: What Is an Indoor Swimming Pool Called?
An indoor swimming pool is most commonly referred to simply as an indoor pool. However, depending on the region, usage, and architectural style, it can also be known by several other names:
- Indoor pool – The most widely accepted and standard term.
- Swim spa – A hybrid between a spa and a pool, often used indoors for aquatic workouts and therapy.
- Pool house – Rarely used, but sometimes describes a separate structure housing a pool.
- Indoor water complex – A broader term for commercial or large-scale indoor aquatic centers.
- Water atrium – Often used in luxury residential or hospitality architecture.
These names often reflect the pool’s purpose, location, and additional features. For example, a “water atrium” implies a connection to a building’s architectural flow, while a “swim spa” focuses on multifunctional use.
Why Is the Name Important?
Choosing the correct terminology affects not only communication but also legal considerations, construction permits, marketing (in the case of hotels or gyms), and maintenance protocols. For instance, a residential “indoor pool” may be subject to different safety codes than a commercial “natatorium.”
Common Features and Components of an Indoor Swimming Pool
Understanding what defines an indoor swimming pool helps clarify its structure and function. Unlike outdoor pools, indoor pools are enclosed within a building or structure, which allows for year-round use but requires more complex engineering and regulation.
Key Features of Indoor Pools:
- Enclosed Environment: Protected from weather elements and often temperature-controlled.
- Heated or Temperature-controlled Water: Essential to maintain comfort and prevent condensation issues.
- Ventilation and Air Quality Systems: Indoor pools require advanced HVAC systems to manage humidity and chlorine byproducts.
- Specialized Pool Covers and Drainage: For safety, energy conservation, and water cleanliness.
- Lighting and Acoustics: Strategic lighting for safety and aesthetics; sound control for comfort in enclosed spaces.
Each of these components varies depending on the type of building or facility hosting the pool, which leads us into the next section.
Different Types and Contexts of Indoor Pools
Indoor swimming pools serve a variety of purposes and appear in different environments, from private residences to public facilities and luxury spas. Let’s look at the classifications and where you might commonly find indoor pools.
1. Residential Indoor Pools
These are installed in private homes for personal use. They can be part of the home or a separate structure like a pool house or conservatory. They often feature:
- Heated water systems
- Customized tile designs and water features
- Advanced filtration and sanitation systems
Luxury homes sometimes incorporate a water atrium or a pool room that blends with the interior decor and can be accessed through a living area or garden.
2. Commercial Indoor Pools (Hotels, Resorts, Spas)
Commercial pools are usually part of hospitality services and are built to accommodate multiple users at once. These often feature:
| Feature | Description |
|---|---|
| Pool Bar or Lounge | Designed for relaxation and entertainment alongside the pool. |
| Guest Access | Accessible to hotel or resort guests with safety measures in place. |
| Therapy or Swim-Up Sections | Dedicated for hydrotherapy, lap swimming, or recreational use. |
Hotels and luxury resorts use terms like indoor pool or lap pool depending on the design and intended activity.
3. Public and Recreational Facilities
These indoor pools are often part of community centers, school gyms, or health clubs. They include:
- Olympic-sized pools
- Therapeutic/therapy pools with resistance jets
- Swim lessons or competition zones
These facilities must adhere to strict public health and safety regulations to ensure they are accessible and safe for diverse users.
4. Athletic and Olympic Training Centers
High-performance athletes train in specialized indoor pools that can have advanced features like:
- Adjustable water levels
- Underwater cameras and training tools
- Current-generating systems for open-water simulation
These pools are crucial for competitive swimmers and triathletes who require year-round training in a controlled environment.
Pro Tip:
If you’re looking to build a private indoor pool for a sports or fitness-based lifestyle, consider investing in adjustable depth and current systems to maximize utility.
The Term ‘Natatorium’: A More Technical Definition
While “indoor swimming pool” is the most common and understood term, there exists a more technical, formal term used less frequently in casual conversation: natatorium. This term is used in architectural, engineering, and aquatics industry contexts.
What is a Natatorium?
A natatorium is a building designed specifically to house a swimming pool. While it can technically include outdoor enclosures, it is most commonly associated with fully-enclosed indoor pools.
The term comes from the Latin verb natare, which means “to swim.” So a natatorium is literally a “place to swim.” This word often emphasizes the full environment around the pool, including locker rooms, spectator stands, filtration systems, and architectural design.
When Is ‘Natatorium’ Used?
The term is preferred in:
- Architectural blueprints and building designs
- Municipal or institutional project proposals
- Specialized publications related to aquatic engineering and environmental systems
- Competitive swimming and educational contexts
Understanding the use of “natatorium” can be helpful in professional or regulatory documentation, but it’s not typically used in local zoning laws or informal usage.
Indoor Swimming Pool Construction Overview
Whether it’s a residential, commercial, or athletic installation, building an indoor swimming pool involves specialized planning and considerations different from those of an outdoor pool. Here’s a breakdown of critical elements to understand.
Structural Engineering
Indoor pools need a structure that can:
- Support the weight of water, which is approximately 8.34 pounds per gallon
- Control humidity to prevent corrosion or mold
- Ensure safe, non-slip surfaces and proper drainage
Concrete and steel are typically used for indoor pool shells to enhance durability against moisture.
Climate Control and Air Quality
A major challenge in indoor pool construction is managing the microclimate. Without proper ventilation, chlorine vapors and humidity can cause:
- Respiratory issues
- Corrosion of electrical systems
- Damage to the structure itself
Therefore, HVAC (Heating, Ventilation, and Air Conditioning) systems specially designed for indoor pools are a must. These usually include dehumidifiers, ventilation ducts, and HEPA filters.
Water Treatment Systems
While many home pools rely on chlorine or saltwater systems, indoor pools (especially commercial and public ones) often use more complex water treatment methods, including:
- UV purification systems
- Ozone-based filtration
- Digital pH control and monitoring
These methods help maintain water clarity, health safety, and user comfort.
Regulations, Permits, and Standards
Because of their complexity and usage, indoor swimming pools are subject to a range of legal and safety requirements. Below are some general standards and guidelines.
Building Codes
Municipal building codes dictate:
- Minimum ceiling height above the pool
- Proper access/egress points such as ladders and steps
- Floor durability and slip resistance
In residential settings, local zoning laws may restrict the size or placement of an indoor pool, especially if it’s in a home addition.
Water Quality Standards
For public indoor pools, the CDC (Centers for Disease Control) provides standards on how to keep pool water clean and safe for use.
Access for Disabled Individuals
Under the Americans with Disabilities Act (ADA), public indoor pools are required to have:
- At least one accessible means of entry (e.g., pool lifts or sloped entries)
- Clear signage and appropriate facilities nearby
Public Health Inspections
Commercial indoor pools are regularly inspected by health departments to ensure water quality, chemical balance, and safety protocols meet standards. These include pH levels, chlorine concentration, disinfection byproducts, and more.
Design Considerations for Indoor Pools
One of the most enjoyable aspects of indoor pools is the creative design possibilities. Because they are protected from the elements, indoor pools can be built for comfort and atmosphere as much as function.
Architectural Integration
A residential indoor pool can be integrated seamlessly into home architecture. Popular layouts include:
- Water atrium: A central open space filled with a pool and surrounded by living areas.
- Pool house: A standalone structure used as an extension for recreation and fitness.
- Indoor-outdoor connection: A design that allows for partial exposure via retractable walls or roof.
Architects often focus on maximizing natural light while minimizing condensation and glare.
Lighting and Acoustics
In enclosed spaces, natural and artificial lighting should:
- Ensure clear visibility of the pool bottom and water clarity
- Provide ambient lighting for relaxation and décor
- Be water-resistant and energy efficient
Acoustic design is also crucial since water surfaces tend to reflect sound waves. Strategic placement of sound-absorbing materials helps maintain a quieter environment.
Health and Lifestyle Benefits of Indoor Pools
Beyond their aesthetic value and functionality, indoor swimming pools come with many wellness and lifestyle advantages.
Therapy and Rehabilitation
The controlled water environment of indoor pools makes them ideal for hydrotherapy and rehabilitation. Patients recovering from injuries or dealing with chronic conditions like arthritis or scoliosis benefit from:
- Warm water therapy
- Low-impact exercise
- Resistance training options
Many physical therapy clinics use indoor pools because outdoor ones can’t guarantee stability in temperature and safety from weather.
Year-Round Swimming
One of the most significant benefits of an indoor pool is that it’s usable all year, regardless of climate. This is especially important in colder regions or places where monsoon or extreme summer heat make outdoor pools impractical.
Private Recreational Spaces
For homeowners, having a private indoor pool offers a premium lifestyle upgrade. It allows for relaxation, entertainment options, and even can be marketed to add value to property listings.
Improved Family Health
Families can use indoor pools for fitness routines, swimming lessons, games, or even just relaxing together. This promotes both physical and mental health by reducing stress and encouraging active lifestyles.
Indoor Swimming Pools vs. Outdoor: Which Is Better?
The decision between an indoor vs. outdoor swimming pool often depends on lifestyle, climate, budget, and personal preferences. To help compare, let’s look at a few key distinctions:
| Feature | Indoor Pool | Outdoor Pool |
|————————–|————————————————–|—————————————|
| Climate Dependence | Year-round, unaffected by weather | Seasonal use |
| Initial Cost | Higher due to construction and ventilation | Lower, basic pool builds |
| Maintenance Complexity | Higher due to humidity and HVAC systems | Simpler, but vulnerable to weather |
| Aesthetic Variety | Customizable, integrates interiors | Exposed, dependent on outdoor design |
| Access and Privacy | Private access, ideal for homes | Commonly in backyards or public areas |
| Energy Efficiency | Requires climate control and dehumidifiers | Natural heating possible |
Each type offers advantages. But for those living in variable or extreme climates, indoor swimming pools provide unmatched consistency and comfort.
Conclusion: What Is an Indoor Swimming Pool Called? Now You Know!
The indoor swimming pool is more than a luxury—it’s a dynamic space that combines recreation, health, architecture, and engineering. The question “What is an indoor swimming pool called?” is answered largely as just “indoor pool,” but deeper understanding reveals formal terms like natatorium, multifunctional classifications like swim spa, and various contextual uses that influence naming and design.
Whether you’re a homeowner looking to increase lifestyle value, a hotel developer aiming to attract luxury travelers, or a local community member seeking a safe swimming environment year-round, indoor swimming pools offer a unique solution that’s growing in popularity.
By understanding the terminology, features, planning processes, and health benefits, you’ll be better equipped to decide if an indoor pool is right for your needs or to contribute more knowledgeably to architectural and aquatics discussions.
If you’re considering adding an indoor pool to your home or facility, plan with experts in pool design, engineering, and environmental systems to ensure a safe, stylish, and sustainable aquatic environment that meets code and personal expectations.
Thank you for reading—swim on!
What is the common term for an indoor swimming pool?
An indoor swimming pool is most commonly referred to simply as an “indoor pool.” This term is widely recognized and used to describe any swimming pool that is enclosed within a building or structure, offering protection from the elements. Indoor pools are prevalent in private homes, fitness centers, hotels, and community centers where year-round swimming is desired regardless of outdoor weather conditions.
These pools can vary significantly in size and design, ranging from small lap pools to large recreational facilities with water features. Unlike outdoor pools, indoor pools require specialized ventilation and air quality systems to manage humidity and chemical fumes from the water. This controlled environment makes them especially popular in regions with cold or unpredictable climates.
Are there other names for indoor swimming pools?
Yes, there are several alternative names for indoor swimming pools, including “swim spa,” “indoor lap pool,” “recreational pool,” and sometimes “natatorium.” While these terms often refer to specific types or purposes of indoor pools, they are sometimes used interchangeably depending on the context. A natatorium, for instance, specifically refers to a facility that houses a swimming pool and the necessary mechanical systems to support the pool environment.
The term “swim spa” usually denotes a compact, energy-efficient pool that allows for both swimming and hydrotherapy. The diversity of names reflects the variety of indoor pool designs and functions available today. Understanding these terms can help when researching or shopping for a pool that suits a particular lifestyle or facility need.
What is a natatorium and how is it different from a regular indoor pool?
A natatorium is a specialized structure that houses an indoor swimming pool along with the mechanical systems required to maintain air quality, temperature, and humidity levels. These systems are essential to create a comfortable and healthy environment for swimmers and spectators. Natatoriums are typically found in competitive swimming facilities, aquatic centers, and public recreation complexes.
Unlike a residential indoor pool, which might focus more on convenience and comfort for a single household, a natatorium is designed for larger-scale use and must meet strict engineering and environmental standards. The high volume of water evaporation in such facilities requires advanced dehumidification and ventilation systems. As a result, natatoriums are often more complex and costly to build and maintain.
Why would someone choose to install an indoor swimming pool?
There are many reasons why individuals or institutions might choose to install an indoor swimming pool. One of the primary benefits is the ability to swim year-round, regardless of weather conditions. This is especially advantageous in regions with long, cold winters or extreme summer heat, where outdoor swimming might be inconvenient or unsafe for extended periods.
Additionally, indoor pools offer increased privacy and potentially enhanced security, as they can be placed within a controlled structure or building. They also allow for better temperature control of both the water and the surrounding air, enhancing swimmer comfort. Beyond recreational purposes, indoor pools are ideal for physical therapy, competitive training, and fitness routines, making them a versatile choice for many users.
What are the challenges of owning an indoor swimming pool?
Owning an indoor swimming pool presents unique challenges, particularly related to ventilation, humidity control, and maintenance. Because an indoor pool is enclosed, moisture in the air can lead to mold growth, structural condensation, and damage to building materials if not properly managed. This means owners must invest in a high-quality dehumidification system to maintain a healthy and safe environment.
Moreover, maintenance can be more complex and costly compared to outdoor pools. Indoor facilities require regular cleaning, water treatment, and checks on mechanical systems to ensure everything is operating efficiently. The enclosed space can also limit natural light and fresh air, sometimes affecting the overall swimming experience. Potential owners should weigh these considerations carefully before committing to an indoor pool construction project.
How much does it cost to build an indoor swimming pool?
The cost of building an indoor swimming pool varies widely depending on the size, design, materials, and systems required. On average, a basic indoor pool installation for a residential setting can start at around $50,000 and often exceeds $150,000. This includes expenses for the pool structure itself, construction of the enclosure or room, plumbing, heating systems, and essential ventilation and dehumidification units.
For commercial or institutional natatoriums, the costs can run into the millions due to the need for enhanced safety features, public access compliance, and high-capacity environmental control systems. Factors such as local building codes, labor costs, permits, and luxury features like underwater lighting or tile finishes also influence the overall investment. It’s crucial to work with professionals and create a detailed budget before starting construction.
Can a regular pool be converted into an indoor swimming pool?
Converting a regular pool into an indoor swimming pool is possible, but it is a complex and often expensive process that involves building a structure around the existing pool area. This conversion typically requires a building permit and significant structural modifications to enclose the pool completely while addressing ventilation, humidity, and water quality needs. Many homeowners find that it’s often more practical and cost-effective to build a new indoor pool room during a home renovation.
If the decision to convert is made, considerations such as ceiling height, insulation, and accessibility must be addressed. The existing pool systems may need to be upgraded to accommodate the enclosed environment, and additional equipment like dehumidifiers and ventilation ducts must be installed. While technically feasible, the extent of the project means careful planning and professional consultation are essential for a successful transformation.