Steam Buying Guide
Adding a steam shower or commercial steam room is one of the best ways to create a premium wellness experience. But choosing the right system means understanding steam generators, generator kits, control kits, sizing, and installation requirements. This guide breaks it all down so you can confidently choose the right steam setup for your home, spa, or commercial project.
In This Guide
What Is a Steam Shower?
A steam shower is an enclosed shower or steam room designed to fill with warm steam produced by a dedicated steam generator. Unlike a standard shower, a steam system creates a humid heat environment that can turn a normal bathroom, spa, or wellness area into a more relaxing and luxurious space.
A complete steam system typically includes a steam generator, a control interface, and the components required to safely deliver steam into the enclosure. The right setup depends on the size of the steam room, the materials used inside it, the features you want, and whether you are buying individual components or a complete kit.
What Makes Up a Steam System?
Before choosing products, it helps to understand the main parts of a steam shower system.
Steam Generator
The steam generator is the core of the system. It heats water and produces the steam that is delivered into your steam shower or steam room.
Controls
Steam controls allow you to start the system, set session duration, manage temperature-related settings, and in some cases access advanced features such as presets, smart controls, or wellness functions.
Steam Head and Accessories
Depending on the system, your setup may also include a steam head, control cable, sensors, drains, aroma options, and other accessories.
Kits
Kits bundle compatible components into one package, making it easier to purchase a complete system with fewer compatibility questions.
Steam Generators
A steam generator is the heart of any steam shower system. If you already know what controls and accessories you want, or if you are replacing an existing unit, buying the generator by itself may be the right choice.
Shop our collection of steam generators here.
- Best for buyers who only need the generator
- Ideal for replacements or custom system builds
- Available in residential and commercial output ranges
- Requires compatible controls and related components
Steam Generator Kits
Steam generator kits are often the easiest choice for homeowners and builders who want a more complete solution. These packages typically combine a steam generator with matching components, helping simplify system selection and installation planning.
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- Convenient all-in-one buying option
- Helps reduce compatibility guesswork
- Excellent for first-time steam shower buyers
- Strong choice for complete new installations
Steam Control Kits
Steam control kits are designed for buyers who want the interface and control components needed to operate their steam system. These can be especially important when matching the control style, finish, and feature set to the rest of the shower or wellness space.
Browse our steam control kits here.
- Ideal for replacing or upgrading controls
- Helpful when matching system components
- Great for buyers focused on features, style, and usability
- Often paired with compatible generators and accessories
Steam Generator Sizing Guide
Steam generators should be sized by cubic feet, not just square feet, because ceiling height directly affects the volume of the steam room. To calculate room volume, multiply the room’s length × width × height.
The table below is a general planning guide. The square-foot examples assume an 8 ft ceiling. Rooms with a lot of glass, stone, tile, exterior walls, or other heat-absorbing surfaces may require sizing up. Always check the manufacturer’s recommendations for the exact model you are considering.
| Generator Size | Approx. Room Volume | Approx. Floor Area at 8 ft Ceiling | Typical Use |
|---|---|---|---|
| 3kW | Up to 100 cu. ft. | Up to 12.5 sq. ft. | Very small residential steam showers |
| 5kW | 100–200 cu. ft. | 12.5–25 sq. ft. | Small residential steam showers |
| 6kW | 200–250 cu. ft. | 25–31 sq. ft. | Compact to mid-size residential rooms |
| 7.5kW | 250–315 cu. ft. | 31–39 sq. ft. | Mid-size residential steam showers |
| 9kW | 315–375 cu. ft. | 39–47 sq. ft. | Larger residential steam rooms |
| 10kW | 375–450 cu. ft. | 47–56 sq. ft. | Large residential steam rooms |
| 12kW | 450–550 cu. ft. | 56–69 sq. ft. | Very large residential or light commercial |
| 15kW | 550–675 cu. ft. | 69–84 sq. ft. | Large custom residential or small commercial |
| 18kW | 675–800 cu. ft. | 84–100 sq. ft. | Commercial steam rooms |
| 24kW | 800–1,000 cu. ft. | 100–125 sq. ft. | Larger commercial steam rooms |
| 30kW | 1,000–1,250 cu. ft. | 125–156 sq. ft. | Commercial wellness installations |
| 36kW | 1,250–1,500 cu. ft. | 156–188 sq. ft. | Larger commercial steam rooms |
| 48kW | 1,500–2,000 cu. ft. | 188–250 sq. ft. | Commercial spa and wellness spaces |
| 60kW | 2,000–2,500 cu. ft. | 250–313 sq. ft. | Large commercial steam rooms |
| 72kW | 2,500–3,000 cu. ft. | 313–375 sq. ft. | Heavy-duty commercial installations |
| 90kW | 3,000–3,750 cu. ft. | 375–469 sq. ft. | Large commercial and institutional projects |
| 120kW | 3,750–5,000 cu. ft. | 469–625 sq. ft. | Very large commercial steam rooms |
These sizing ranges are general planning estimates only. Final sizing can vary by manufacturer and by room construction. If your steam room includes significant glass, stone, tile, or high ceilings, it is smart to size the system using the exact manufacturer recommendations for that generator.
Residential vs Commercial Steam Systems
Residential steam systems are typically designed for private home steam showers and smaller custom wellness spaces. Commercial steam systems are built for larger rooms, heavier usage, and projects such as spas, health clubs, hotels, and multi-user wellness facilities.
| Feature | Residential Steam Systems | Commercial Steam Systems |
|---|---|---|
| Typical Size Range | Smaller kW outputs | Higher kW outputs, including large multi-unit systems |
| Usage | Private home use | Frequent or continuous commercial use |
| Installation Complexity | Moderate | More advanced planning and infrastructure |
| Best For | Bathrooms, home spas, private wellness spaces | Spas, gyms, hotels, condo amenities, wellness centers |
What to Consider Before You Buy
1. Room Volume
Always start with the room dimensions. Generator selection begins with cubic footage, not just rough room size.
2. Room Materials
Glass, stone, tile, and exterior walls can all increase heat loss and may require a larger generator than a basic room of the same size.
3. Generator Only vs Kit
If you already know the exact components you need, buying the generator by itself may make sense. If you want a simpler purchase and matched components, a kit is often the better route.
4. Controls and Features
Some buyers only want simple operation, while others want advanced controls, upgraded styling, or premium wellness features. Think about what level of control matters to you.
5. Installation Requirements
Steam systems require proper electrical, plumbing, drainage, and enclosure planning. Installation should always follow the manufacturer’s requirements and local codes.
6. Compatibility
Not every generator, control, and accessory works interchangeably. Kits help simplify compatibility, while individual component purchases require more attention to matching system parts.
Which Steam System Is Right for You?
The best steam setup depends on how much of the system you already have, how much guidance you want built into the purchase, and the experience you want in the steam room.
- Choose a steam generator if you only need the main unit or are replacing an existing generator.
- Choose a steam generator kit if you want a more complete and convenient system package.
- Choose a steam control kit if your main focus is controls, interface, and compatible operation.
- Choose a commercial steam system if your project involves a larger room, heavy usage, or multi-user operation.
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