The Best Steam Shower Systems for Home in 2026: Mr. Steam vs ThermaSol vs Steamist
By Claire Whitmore. Last updated October 2026.
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A steam shower turns your daily shower into a spa ritual. With a generator hidden in a vanity, closet or attic and a sealed, tiled enclosure, you can step into a room full of warm, fragrant steam every morning.
Steam shower systems are sold mostly through plumbers, showrooms and specialist retailers, so comparing them is tricky. We drew on manufacturer specifications compiled by Saunakivi, buying guides from Peak Primal Wellness and Sauna Republic, a spec comparison from Recovery Room Lab, and installation guidance from Steam Sauna Depot. We haven’t tested these generators ourselves, and several of these sources sell steam equipment, so we’ve noted that where it matters. List prices change, so check current pricing with your installer.
Quick answer: Mr. Steam is the safest choice for most homes, with the widest range and a limited lifetime warranty on generator parts. ThermaSol is the pick for fastest startup and built-in self-cleaning. Steamist offers strong value, and Kohler suits all-Kohler bathrooms.
Steam shower brands compared
| Brand | Strengths | Residential price range* | Generator warranty |
|---|---|---|---|
| Mr. Steam | Widest range; quiet eSeries; AutoFlush; iSteam app | About $1,488-5,915 (eSeries) | Limited lifetime: 2 years in-home service, then parts for life |
| ThermaSol | FastStart steam in as little as 30 seconds; PowerFlush; Smart Steam | About $1,977-4,865 (Pro Series) | 2-year in-home, then parts for life |
| Kohler | Integration with Kohler bathrooms and controls | About $3,366-9,584 (Invigoration) | 1 year limited, per Peak Primal |
| Steamist | Value; e.g. SMP-7 at $1,645 | Check dealer | Check dealer |
| Amerec | Solid mid-range; e.g. AK4.5 at $2,945 | Check dealer | Limited lifetime; parts 5 years |
*Ranges from Peak Primal Wellness (a retailer) and maker list prices compiled by Saunakivi and Recovery Room Lab. Controls, steam heads and installation are extra.
The best steam shower systems
1. Mr. Steam eSeries: best overall
Best for: most homeowners.
Peak Primal Wellness, a retailer, calls Mr. Steam’s eSeries the benchmark, citing quieter operation, AutoFlush tank cleaning and stainless-steel construction, and lists residential models from about $1,488 to $5,915. Sauna Republic notes Mr. Steam’s limited lifetime warranty covers two years of in-home service, parts and labor, then parts for life. Mr. Steam’s iSteam controls add app and Alexa integration. Saunakivi lists the MS90R, rated for up to 71 cubic feet, at $3,075.
Pros
- Widest model range
- Strong warranty
- Quiet; AutoFlush option
Cons
- AutoFlush is an add-on on some lines
- Controls sold separately
2. ThermaSol PRO Series III: best for fast steam
Best for: people who want steam almost instantly.
ThermaSol’s FastStart can produce steam in as little as 30 seconds, PowerFlush self-cleans the tank, and Smart Steam adapts to humidity, according to Peak Primal Wellness. Sauna Republic notes ThermaSol sizes by room volume only and can run up to 50 feet from the shower. Saunakivi lists the PRO Series III 84, rated for up to 84 cubic feet, at $4,435. The warranty covers two years in-home, then parts for life for the original purchaser.
Pros
- Fastest startup
- Built-in self-cleaning on PRO III
Cons
- Pricier at equivalent sizes in some comparisons
3. Steamist SM Plus: best value
Best for: budget-conscious remodels.
Recovery Room Lab, comparing manufacturer specs, found the Steamist SMP-7 (7.5 kW, up to 250 adjusted cubic feet, 40A breaker at 240V) at $1,645 against $3,360 for a Mr. Steam MS400R (9 kW). It hasn’t metered sessions itself. Budget for a Steamist TSC control, which is sold separately.
Pros
- Much lower price
- Smaller circuit
Cons
- Control sold separately
- Auto drain optional
4. Kohler Invigoration 2.0: best for Kohler bathrooms
Best for: renovations built around Kohler fixtures.
Peak Primal Wellness lists Kohler’s residential range at about $3,366 to $9,584 and highlights integration with Kohler’s DTV+ and Konnect controls. It lacks automatic tank flushing and carries a shorter warranty than Mr. Steam or ThermaSol in that comparison.
Pros
- Seamless Kohler integration
Cons
- Higher price
- Shorter warranty
5. Amerec AK series: solid alternative
Best for: buyers comparing beyond the big two.
Saunakivi lists the Amerec AK4.5 (4.5 kW, rated for 60 to 90 cubic feet) at $2,945, with a limited lifetime warranty and five years on component parts.
Pros
- Good warranty
Cons
- Smaller dealer network
How to size a steam generator
Sizing is the most important decision. A generator that’s too small never fills the room. Sauna Republic’s advice is to follow each manufacturer’s own sizing rules, not compare cubic-foot ratings across brands.
Start with volume: length x width x height. Sauna Republic’s example is a 3 x 4 foot shower with an 8-foot ceiling, which holds 96 cubic feet. Then adjust for materials. Mr. Steam adjusts for wall material and ceiling height, so stone or marble walls call for a bigger unit. In that example, ThermaSol recommends its PROIII-140 (8 kW) for tile or marble, while Mr. Steam recommends the MS150R (6 kW) for tile and the MS225R (7.5 kW) for marble. ThermaSol sizes by volume only but suggests sizing up for 9- or 10-foot ceilings.
Power and installation
Peak Primal Wellness says most residential generators need a dedicated 240V circuit of 30 to 60 amps, installed by a licensed electrician. Recovery Room Lab notes the Mr. Steam MS400R draws 38 amps on a 50A breaker, while the Steamist SMP-7 draws 31 amps on a 40A breaker at 240V. Generators can sit some distance away: Sauna Republic says ThermaSol allows up to 50 feet and Mr. Steam up to 60 feet of insulated piping, though Peak Primal recommends keeping it within about 18 feet for best results.
The enclosure matters as much as the generator. A steam shower needs a vapor-proof, fully tiled enclosure, a sloped ceiling so condensation doesn’t drip on you, and a door that seals to the ceiling. Steam Sauna Depot puts equipment at roughly $1,500 to $5,000, and says installation is where budgets usually grow, especially in a full remodel.
Running costs and upkeep
Peak Primal estimates a daily 20-minute session costs about $0.45 to $0.65 at average US electricity rates. Hard water is the main enemy. Automatic flushing (Mr. Steam’s AutoFlush or ThermaSol’s PowerFlush) and annual descaling help, and Peak Primal says regular care can stretch generator life to 15 to 20 years or more. These figures come from a retailer, so treat them as estimates.
Controls and extras
The control is what you’ll touch every day, so choose it carefully. Basic controls set time and temperature. Premium controls add presets for each household member, remote start from an app, and integration with lighting and music. Mr. Steam’s iSteam and XDream packages bundle controls with aromatherapy and chromatherapy, according to Peak Primal Wellness. ThermaSol and Kohler offer their own app and smart-home options.
Other worthwhile extras include an aromatherapy reservoir for eucalyptus or lavender oils, a linear steam head that blends into the wall, a fold-down or built-in bench, and a ceiling-mounted rain head for rinsing off afterward. Each adds cost, so prioritize the ones you’ll use daily.
Which brand is right for you?
| If you… | Choose |
|---|---|
| Want the safest, most widely supported choice | Mr. Steam |
| Want steam almost instantly and built-in self-cleaning | ThermaSol PRO Series III |
| Want to save on equipment | Steamist |
| Are building an all-Kohler bathroom | Kohler |
| Want another option with a good warranty | Amerec |
Steam shower vs sauna
A steam shower delivers humid heat at a lower temperature, inside a space you already use daily. A sauna delivers dry, hotter heat in a dedicated room. If you have space for a sauna, see our infrared vs traditional sauna guide and the best infrared saunas. For more spa upgrades, see our home spa guide and heated towel racks.
Before you buy
- Measure the shower and note wall and ceiling materials.
- Use the manufacturer’s sizing tool for your exact room.
- Confirm your panel can support a dedicated 240V circuit.
- Choose a generator location with access for service.
- Budget for the control, steam head, enclosure upgrades and installation.
- Ask about water hardness and automatic flushing.
How we researched this guide
We don’t test steam equipment in-house. This guide uses manufacturer specifications compiled by Saunakivi and Recovery Room Lab, and buying guides from Peak Primal Wellness, Sauna Republic and Steam Sauna Depot. Several of these sources sell steam equipment. Prices are list prices and change.
FAQ
What is the best steam shower brand?
Mr. Steam is the most common recommendation for most homes. ThermaSol is best for fast startup.
How much does a steam shower cost?
Steam Sauna Depot puts equipment at about $1,500 to $5,000, with installation extra.
What size steam generator do I need?
Follow the manufacturer’s sizing rules for your room’s volume, materials and ceiling height.
Do steam showers need a special circuit?
Usually a dedicated 240V circuit of 30 to 60 amps, according to Peak Primal Wellness.
How much does a steam session cost to run?
Peak Primal estimates about $0.45 to $0.65 for a 20-minute session.
