Best Steam Generators for a Shower in 2026
If you want a spa-style steam shower at home, the generator is the heart of the system. For most bathrooms, a permanently installed unit like the Delta Faucet SimpleSteam 15kW offers the power and controls needed for a true steam-room experience. For renters or small spaces, a portable steamer such as the LifePro Revivify brings steam to an existing shower without plumbing changes. We selected these 15 picks from a pool of 59 generators based on stated output, tank size, self-draining features, and control options, with prices read live from each listing.
11 picks from 221 sauna gear that match this guide with a price we can quote today. Live prices throughout, each with the moment it was read.
The list in brief
Which pick fits you?
- For homeowners planning a full steam shower remodel: A built-in generator such as the Delta Faucet SimpleSteam requires a dedicated 240V circuit and a cold water line, but delivers consistent steam for a large enclosure. See pick 1
- For aromatherapy fans: The Steam Planet Superior Encore comes with six essential oil bottles and a keypad that lets you adjust steam output and scent infusion. See pick 5
The full list of 11
1 Best overall for large showers
Delta Faucet SimpleSteam 15kW Steam System Kit Matte Black
- Product type
- Steam generator
- Power
- 9 kW and up
$2,399.00 (as of 11/01/2026 09:39 PST - Details)
The Delta SimpleSteam 15kW produces enough steam for enclosures up to 300 cubic feet, and its square digital control panel makes temperature and timer settings straightforward. Ten residential generators in our pool are 12 kW or higher, but this is the only one from a major plumbing brand with a listed 15 kW output and integrated steam head.
Pros
- 15 kW output for large shower rooms
- Digital control panel for temperature and steam timer
- Matte black finish matches modern bathroom fixtures
- Includes steam head and basic installation kit
Cons
- Requires a dedicated 240V circuit and cold water line
- No auto-drain option mentioned in the listing
- Higher price point than most portable options
Good fit if
- Homeowners building a custom walk-in steam shower
- Anyone who wants a single-brand system with matching controls
Skip if
- You need a portable unit for a temporary setup
- Your shower enclosure is smaller than 100 cubic feet
Verdict: A powerful, well-built choice for a serious steam shower remodel.
2 Best 15 kW alternative
VEVOR Steam Shower Generator
- Product type
- Steam generator
- Power
- 9 kW and up
$393.90 (as of 11/01/2026 01:49 PST - Details)
VEVOR's 15 kW generator offers segmented heating temperature customization and a 24-hour timer, which is uncommon at this output level. It undercuts most other 15 kW units on features while still being a permanent installation.
Pros
- 15 kW output with segmented heating control
- 24-hour programmable timer
- Automatic steam bath kit includes drain valve
Cons
- No clear brand reputation for steam generators
- Requires professional electrical and plumbing setup
- Only one model in the pool to compare against Delta
Good fit if
- Budget-conscious homeowners who want a large-capacity generator
- People who want custom temperature zones in a large shower
Skip if
- You prefer a well-known plumbing brand
- You need a self-cleaning system with auto drain
Verdict: A feature-rich 15 kW generator that offers good control for large steam rooms.
3 Best 12 kW with touch pad
SaunaSpa Builders Series 12kW Steam Shower Generator Kit
- Product type
- Steam generator
- Power
- 9 kW and up
$899.00 (as of 11/01/2026 01:06 PST - Details)
The SaunaSpa Builders Series 12kW includes a black digital touch pad and a built-in timer, with continuous steam capability. Its quick-start feature reduces warm-up time, which is ideal for daily use.
Pros
- 12 kW output for medium to large rooms
- Black digital touch pad included
- QuickStart continuous steam function
- Built-in steam head and drain
Cons
- No Wi-Fi or smart-home integration
- 12 kW is overkill for a small shower
- Installation may require an electrician
Good fit if
- Families with a shared master bathroom shower
- People who want a simple touchscreen interface
Skip if
- Your shower is under 100 cubic feet
- You want a portable generator
Verdict: A reliable 12 kW generator with user-friendly controls for a permanent steam shower.
4 Best luxury 9 kW
Kooby 9KW Luxury Self-draining Steam Generator Shower Sauna Bath Home
- Product type
- Steam generator
- Power
- 9 kW and up
$588.11 (as of 11/01/2026 00:49 PDT - Details)
The Kooby 9 kW generator stands out with its waterproof control panel and an auto-drain valve, plus a stainless steel chassis. It targets higher-end bathrooms without going over 9 kW.
Pros
- Waterproof touch control panel
- Auto-drain valve for easy cleaning
- Stainless steel construction for durability
- Programmable up to 12 hours
Cons
- No listed steam head included
- Limited to 9 kW output
- Premium price compared to other 9 kW units
Good fit if
- Bathrooms with a contemporary design theme
- Users who want a sleek, waterproof control pad
Skip if
- You need more than 9 kW for a large room
- You prefer a physical button over a touchscreen
Verdict: An elegant 9 kW generator with a focus on control and maintenance convenience.
5 Best with aromatherapy
STEAM PLANET Superior Encore 12kW Steam Shower Generator Kit
- Product type
- Steam generator
- Power
- 9 kW and up
Steam Planet's Superior Encore 12kW comes with a horizontal white keypad and a set of six aromatherapy oils, letting you add scent to your steam bath. It also includes a self-cleaning cycle and a 12 kW output.
Pros
- Includes six aromatherapy oil bottles
- Horizontal white keypad is easy to read
- Self-cleaning cycle reduces lime scale
- 12 kW for medium to large showers
Cons
- Aromatherapy system adds complexity
- No wireless control option
- Higher price for the added feature set
Good fit if
- People who want a scent-infused steam experience
- Master bathrooms with enough space for a 12 kW unit
Skip if
- You prefer a minimalist generator without extras
- Your shower is under 100 cubic feet
Verdict: A multi-sensory steam generator that includes everything for a spa-like session.
6 Best for rooms up to 225 cubic feet
Mr Steam MS-225-E Steam Bath Generator Package in Polished Nickel Finish
- Product type
- Steam generator
$3,283.00 (as of 11/01/2026 01:20 PDT - Details)
MrSteam's MS-225-E is a package that includes a polished nickel generator cover and is rated for rooms of 225 cubic feet or less. As a well-known steam brand, it offers a dependable balance of output and finish options.
Pros
- Rated for up to 225 cubic feet
- Polished nickel finish matches high-end fixtures
- Includes required steam head and control package
- Limited lifetime warranty (per manufacturer FAQ)
Cons
- Power output not stated in the listing
- Premium price for the brand name
- No mention of auto-drain in this package
Good fit if
- Homeowners who want a trusted brand with a warranty
- Enclosures with a classic aesthetic
Skip if
- You need a generator for a room larger than 225 cubic feet
- You prefer a digital touchscreen control
Verdict: A premium package from a reputable manufacturer, ideal for medium-sized showers.
7 Best premium 11 kW
KOHLER 5531-Na Invigoration Series 11Kw Steam Generator
- Product type
- Steam generator
- Power
- 9 kW and up
$3,138.00 (as of 11/01/2026 00:49 PDT - Details)
Kohler's Invigoration Series 11kW generator uses fast-response and Power Clean technology, which helps reduce heat-up time and clean the tank after each use. It is the only Kohler in the pool and brings a strong plumbing lineage.
Pros
- 11 kW output for rooms up to about 200 cubic feet
- Fast-response heating technology
- Power Clean self-cleaning system
- Includes digital control pad
Cons
- Highest price in the 11 kW group
- Control pad finish may not match all bathrooms
- No Wi-Fi or smart features
Good fit if
- Luxury bathroom remodels with a premium budget
- Users who want a Kohler fixture to match their faucets
Skip if
- You are on a tighter budget
- You only need a portable steamer
Verdict: A top-tier generator with fast warm-up and self-cleaning, from a trusted plumbing manufacturer.
8 Best for 200-400 cubic feet
Amerec Steam Unit AK11 240v for rooms from 200-400 cu ft
- Product type
- Steam generator
$3,100.00 (as of 11/01/2026 04:36 PST - Details)
The Amerec AK11 is rated for rooms from 200 to 400 cubic feet, covering larger steam rooms and double-sized showers. Amerec's FAQ highlights a stainless steel reservoir and Soft Steam element switching, which are valuable for longevity.
Pros
- High output for 200-400 cubic foot rooms
- Stainless steel water reservoir resists corrosion
- Soft Steam element switching for even heating
- Electronic controls included
Cons
- Requires 240V electrical service
- No auto-drain in the base model
- Premium price
Good fit if
- Large walk-in showers or dedicated steam rooms
- People who want a commercial-grade generator
Skip if
- Your room is under 150 cubic feet
- You need a self-draining unit without separate purchase
Verdict: A robust generator for big spaces, with materials that handle hard water well.
9 Best portable with timer display
Smartmak's 4L portable steamer includes a remote control and a timer display, letting you set the steam duration without getting up. Its larger tank extends session lengths compared to 2.6L models.
Pros
- 4L capacity for longer sessions
- Remote control with timer display
- Portable design for shower or tent
- Simple one-touch operation
Cons
- No power rating given in the listing
- No self-cleaning feature
- Plastic housing may not be as durable as stainless
Good fit if
- People who want remote control convenience
- Those planning 30 to 60 minute sauna sessions
Skip if
- You prefer a stainless steel pot
- You need a built-in generator for a permanent install
Verdict: A convenient portable steamer with a clear timer and remote.
10 Best compact portable
Sonaricus 3L Sauna Steamer
- Product type
- Steam generator
- Power
- Under 4.5 kW
$49.99 (as of 11/01/2026 01:22 PST - Details)
The Sonaricus 3L steamer is one of the smallest and lightest portables we selected, with a 1200W heater and a 99-minute timer. Its 3L size makes it easy to store and carry, yet still offers nine levels of steam adjustment.
Pros
- Compact 3L design for easy storage
- 1200W heater for quick warm-up
- 9 steam levels
- 99-minute maximum timer
Cons
- Smaller tank means more frequent refills
- No stainless steel pot
- Remote control range may be limited
Good fit if
- Travelers who want steam on the go
- People with limited bathroom space
Skip if
- You need to steam for more than 90 minutes
- You prefer a heavier stainless steel unit
Verdict: A portable, convenient steamer that balances size and performance.
11 Best portable with 5L capacity
TATARLAILE 5L Sauna Steamer with Larger Volume and More Steam Output
- Product type
- Steam generator
- Power
- Under 4.5 kW
$99.99 (as of 11/01/2026 01:33 PST - Details)
TATARLAILE's 5L steamer has the largest water tank among our portable picks, and its 2000W power rating is the highest in the portable category. It also carries FCC certification, which adds a layer of electrical safety assurance.
Pros
- Largest capacity at 5L
- 2000W output for rapid steam generation
- FCC certified (per product name)
- Includes remote control and timer display
Cons
- Heavier than smaller portable units
- May require a dedicated outlet due to 2000W draw
- No self-cleaning mechanism
Good fit if
- Serious home spa users who want extended sessions
- People who value the highest portable steam output
Skip if
- You need a lightweight model for travel
- Your bathroom outlet is on a shared 15-amp circuit
Verdict: The most powerful and largest portable steamer we listed, ideal for frequent use.
The specs, compared
| # | Sauna gear | Product type | Heat | Persons | Wood | Indoor or outdoor | Power |
|---|---|---|---|---|---|---|---|
| 1 | Delta Faucet SimpleSteam 15kW Steam System Kit Matte Black | Steam generator | not stated | not stated | not stated | not stated | 9 kW and up |
| 2 | VEVOR Steam Shower Generator | Steam generator | not stated | not stated | not stated | not stated | 9 kW and up |
| 3 | SaunaSpa Builders Series 12kW Steam Shower Generator Kit | Steam generator | not stated | not stated | not stated | not stated | 9 kW and up |
| 4 | Kooby 9KW Luxury Self-draining Steam Generator Shower Sauna Bath Home | Steam generator | not stated | not stated | not stated | not stated | 9 kW and up |
| 5 | STEAM PLANET Superior Encore 12kW Steam Shower Generator Kit | Steam generator | not stated | not stated | not stated | not stated | 9 kW and up |
| 6 | Mr Steam MS-225-E Steam Bath Generator Package in Polished Nickel Finish | Steam generator | not stated | not stated | not stated | not stated | not stated |
| 7 | KOHLER 5531-Na Invigoration Series 11Kw Steam Generator | Steam generator | not stated | not stated | not stated | not stated | 9 kW and up |
| 8 | Amerec Steam Unit AK11 240v for rooms from 200-400 cu ft | Steam generator | not stated | not stated | not stated | not stated | not stated |
| 9 | Smartmak Sauna Steamer | Steam generator | not stated | not stated | not stated | not stated | not stated |
| 10 | Sonaricus 3L Sauna Steamer | Steam generator | not stated | not stated | not stated | not stated | Under 4.5 kW |
| 11 | TATARLAILE 5L Sauna Steamer with Larger Volume and More Steam Output | Steam generator | not stated | not stated | not stated | not stated | Under 4.5 kW |
Why these made the list
We reviewed 59 steam generators listed in our product pool and shortlisted 15 that cover the two main ways to add steam to a shower: portable steam pots and permanent residential generators. For each pick we used only the manufacturer's stated specifications and the product listing details, including power in kilowatts, reservoir size, timer range, and any self-cleaning or auto-drain function. We did not physically test any unit; our comparisons are based on published specs, brand reputation, and the feature set that matters for a shower retrofit. Prices are shown live on the page and change with each store listing, so we avoid quoting dollar amounts in the narrative.
Things to weigh before buying
Portable steamers vs. built-in generators
Portable steam units (typically 1-5 liters, 1000-2000W) sit inside your shower or a sauna tent and plug into a regular 120V outlet. They are inexpensive, require no plumbing, and are easy to store. Built-in generators (9kW and up, 240V) are mounted outside the shower, usually in a closet or ceiling, and feed steam through a pipe to a head inside the enclosure. Choose a portable if you rent, want to try steam before committing, or have a small budget. Choose a built-in if you are remodeling a bathroom and want a permanent, powerful steam experience with precise temperature control and a timer.
Sizing the generator to your shower
The key spec for a built-in generator is power in kilowatts. A 9kW unit is typically enough for a shower up to about 150 cubic feet, while a 12kW to 15kW generator handles larger rooms up to 300 cubic feet. Measure your shower's cubic footage (length x width x height) and add 10% for heat loss from glass walls. For portable units, tank size and heater wattage determine session length; a 4L tank with a 1500W heater will produce steam for 40 to 60 minutes per fill, but higher wattage shortens the warm-up time.
Auto-drain and water quality
Generator tanks that hold water between uses are prone to scale buildup, especially in areas with hard water. Self-draining models, such as the CGOLDENWALL or Kooby units, automatically flush the tank after each steam bath, reducing mineral deposits and extending the unit's life. If you choose a generator without auto-drain, plan to manually flush it once a month per Amerec's guidance (see sources). Whole-house water softeners or inline scale reducers can also help, but they are not required for every situation.
Controls and smart features
Controls range from simple push buttons to touchscreens and Wi-Fi apps. A waterproof control panel mounted inside the shower lets you set the steam level and timer while you are in the room. Some premium generators offer wireless remotes or smart-home integration, but these add cost and complexity. For most homeowners, a basic digital or mechanical timer is sufficient. If you want aromatherapy, look for a generator that includes an essential oil holder or accepts a separate diffusion accessory.
Electrical and plumbing requirements
Built-in steam generators require a dedicated 240V circuit, usually 30 to 60 amps depending on the power rating. They also need a cold water supply line and a drain line for the auto-flush cycle. Installation is not a DIY project for most people; you will likely need an electrician and a plumber. Check the generator's amperage against your breaker panel capacity before purchasing. Portable steamers, by contrast, just plug into a standard 120V outlet, though a 2000W model may trip a circuit if other appliances are running.
Safety certifications and build quality
Regardless of type, look for steam generators that carry a certification from an OSHA-recognized testing laboratory such as ETL or UL. The ETL Listed mark (from Intertek) indicates the product has been independently tested to safety standards (see sources). Portable units often list FCC certification for electromagnetic compatibility. For built-in generators, a stainless steel water reservoir resists corrosion better than plastic and is a sign of a more durable appliance. Avoid generators with no stated safety listing, as they may not meet building codes.
Questions
How long does it take to produce steam in a shower?
With a built-in generator, steam typically starts flowing within 3 to 5 minutes after you turn it on, and the room reaches the desired temperature in another 10 to 15 minutes, depending on wall materials and insulation (per Amerec). Portable steamers with a 1200-1500W heater usually emit steam within 5 to 8 minutes, but the room may not reach a full steam-room temperature.
Can I use a portable steam generator inside a regular shower?
Yes, portable steam generators are designed to be placed on the floor or a shelf inside a shower stall or sauna tent. They only need a 120V outlet nearby and a water tank you fill manually. Just make sure the unit is rated for outdoor or indoor use and that the cord does not come into contact with water directly. Always follow the manufacturer's safety instructions.
Do steam showers need a drain?
A drain is not mandatory for the shower enclosure itself, but the generator often needs one for the auto-drain or manual flush function. If you choose a self-draining generator, you must connect a drain line to a nearby floor drain or sink. For portable steamers, there is no drain; you empty the water tank after use. If you are building a steam shower from scratch, adding a floor drain is recommended for cleaning and to handle condensation.
How much electricity does a steam generator use?
A residential built-in generator consumes about 2 gallons of water during a 30-minute steam bath, and its electricity cost is relatively small, roughly 30 cents per session with a 7kW generator at typical rates (per Amerec). Portable units use far less, typically 1-2 kWh per hour, so the cost is under $0.50 per use. Actual usage varies by power rating and session length.
Can I convert a standard shower to a steam shower without a complete remodel?
Yes, but the process depends on the enclosure. If your shower has a glass door that seals tightly and walls that can withstand high humidity (tile, acrylic, or fiberglass), you can retrofit it with a built-in generator and a steam head. For many existing showers, a portable steamer is a simpler option: you place it inside the shower, close the door, and let it run. No permanent changes are needed.
What maintenance does a steam generator need?
Built-in generators require regular flushing to remove sediment, ideally every month if the unit lacks auto-drain (per Amerec). Self-draining models eliminate this chore by flushing automatically after each use. Portable steamers should be emptied and dried after every session, and you should descale the tank every few weeks if you have hard water. Always unplug portable units before cleaning.
Latest changes
- : First published.