Mr.Steam eSeries MS90EC1 Steam Shower Generator
Steam
$1,799

Mr.Steam

Mr.Steam eSeries MS90EC1 Steam Shower Generator

★4.5from 300 reviews across retail listings

Cross-shoppers land here after realizing their dream isn't dry 195°F air but a 115°F fog you can barely see through — a steam shower, and Mr.Steam is the name-brand way to build one. The eSeries MS90EC1 is the residential workhorse: 5kW, sized for tiled enclosures up to 71 adjusted cubic feet, about $1,799 at big-box retail for the generator. The critical education, which r/Sauna delivers bluntly in every crossover thread: steam and sauna are different animals (100% humidity at ~110-120°F versus dry 180-200°F), and the generator is the cheap part — a properly vapor-sealed, sloped-ceiling tiled enclosure plus plumbing and electrical routinely runs $5,000-$15,000 in renovation. Owners of finished installs love them daily; the horror stories are all botched enclosures, not failed generators. Buy controls, AromaSteam head, and AutoFlush as a package; à la carte pricing stings.

Price
$1,799
Heater
5kW
Best For
Bathroom remodelers who want daily steam showers, not a Finnish sauna.

Specifications

Heater
5kW residential steam generator
Heater Power
5kW
Dimensions
Compact generator (closet/vanity mount); for enclosures to 71 adjusted ft3
Type
Steam
Install
Licensed plumber + electrician: 240V circuit, water line, steam line to a fully tiled, vapor-sealed shower; controls extra
Warranty
Limited residential warranty from Mr.Steam; register on install
Model
eSeries MS90EC1 (5kW)

Highlights

The name in home steam5kW residential workhorsePackages with aroma/auto-flush

Pros

  • ✓Category-defining brand with deep parts and dealer support
  • ✓Right-sized 5kW for typical residential shower conversions
  • ✓Package options add aromatherapy, autoflush, and app controls
  • ✓Compact generator hides in a vanity or closet nearby
  • ✓Steam at 110-120°F suits people who find saunas punishing

Cons

  • ✗Generator is a fraction of true cost — enclosures run $5,000-$15,000
  • ✗Requires plumber, electrician, and a vapor-sealed tiled shower
  • ✗Controls and steam head cost extra unless bundled
  • ✗Hard water demands flush discipline or scale kills it
  • ✗It is not a sauna, and cross-shoppers must internalize that

Common Questions

Is $1,799 the real cost of a steam shower?
No — the generator is a fraction of the project. A proper vapor-sealed, fully tiled enclosure typically runs $5,000-$15,000 with trades, and the control and steam head cost extra unless you buy a bundled package. Budget the room first and the generator second.
What does installation require?
A licensed plumber and electrician: a 240V circuit, a water feed, and a steam line into a shower that is fully tiled and vapor-sealed — an ordinary shower with a glass door will not hold steam. The compact generator itself hides in a vanity or closet within the plumbing run, so it claims no visible space.
How do I keep hard water from killing it?
Scale is the number-one generator killer, and Mr.Steam's AutoFlush option drains the tank about two hours after each session to slow buildup. Even with AutoFlush, plan periodic descaling — as often as every couple of months in genuinely hard water — or feed it softened water and stretch that interval considerably.
How do I know if 5kW is enough for my shower?
The MS90EC1 covers enclosures up to 71 adjusted cubic feet — and 'adjusted' is the key word: glass, stone, and tall ceilings all inflate the effective volume beyond raw measurements. Run Mr.Steam's sizing calculation on your actual materials before assuming the 5kW fits.
How different is steam from a sauna, really?
Completely different experience: a steam shower runs around 110-120F at total humidity — a fog you can barely see through — versus a sauna's 180F-plus dry air. Many cross-shoppers discover the humid version is what they actually wanted, but go in knowing you are building a steam room, not a sauna.

Compare the Mr.Steam eSeries MS90EC1 Steam Shower Generator

Steamist SM Plus SMP-7 Steam Shower Generator
$2,600
Steam
4.5(150)

Steamist is the other legacy American steam name — now also sold under Delta's SteamScape branding after acquisition, a detail worth knowing when comparing listings — and the SM Plus SMP-7 is its 7.5kW mid-size generator at about $2,600. The engineering pitch is SteadySteam, which modulates output to hold your set temperature instead of the blast-and-coast cycling cheaper generators do, plus a stainless tank and a sub-gallon water draw per 20-minute session. Plumbers and owners rate the brand's reliability alongside Mr.Steam, with the choice often coming down to which controls ecosystem (TotalSense vs. iSteam) and which dealer you like. All the steam-category realities apply: the enclosure build is the real project and the real budget, hard water is the enemy, and r/Sauna will remind you — accurately — that a steam shower is a different pleasure than sauna, not a substitute.

SteadySteam temperature holdingStainless tank longevityNow under Delta's wing
7.5kW heater
Best for: Remodelers comparing against Mr.Steam who value steadier temperature control.
Specs, install & tradeoffs
Dynamic Barcelona 1-2 Person Low EMF Infrared Sauna
$1,899
Infrared

The Barcelona is America's default budget infrared — the Costco-and-Amazon staple at $1,899 (frequently less on promotion) that has introduced more households to home heat therapy than any premium brand. Canadian hemlock panels click together in an afternoon, it plugs into a normal wall outlet, and it does what owners want: 20-minute sweats with Bluetooth playing. Now the honest part the listings gloss: retailer specs admit the standard model's 'low-EMF' means 5-10 mG measured a few inches from the panels — an order of magnitude above Clearlight's sub-1 mG — and the $2,299 'Elite' exists precisely to fix that. Max temps hover around 140°F, walls are thin, and r/Sauna's verdict is a shrug: 'it's a warm box, and for $1,900 that's fine.' As a first step into IR with modest expectations, it earns its 900+ reviews.

The budget IR benchmarkPlugs into any wall outletAfternoon assembly
2-personLow-EMF claimed
Best for: Budget-first buyers who want a functional daily sweat box without electrical work or premium claims.
Specs, install & tradeoffs
SweatTent Wood-Fired Sauna Tent
$1,499
Portable/Blanket

The SweatTent is the budget option r/Sauna actually respects, because it cheats none of the physics: a $1,499 pop-up tent with a real wood-burning stove and stones on top, hitting a legitimate 200°F with water-on-rocks löyly — hotter than any infrared cabin at any price. The 300°F-rated Oxford nylon shell sets up in under ten minutes, needs zero electrical work, and travels to campsites. Reviewers call it the best sub-$2,000 sauna experience sold. The honest running costs and quirks: firewood (SweatTent's own bundles run $50 for 4-6 sessions), 20-30 minutes of stove-tending before it's hot, condensation dripping from the ceiling in cold weather, and a fabric shell that is ultimately consumable — years, not decades. No HOA will mistake it for landscaping. As a first real sauna or a cabin-property rig, it's the community's default budget answer.

Real 200°F wood-fired löylyNo electrical work everTen-minute setup, portable
3-person200°F max
Best for: Backyard and cabin owners who want genuine Finnish-grade heat at a tent price.
Specs, install & tradeoffs
Amerec Designer B 8kW Sauna Heater
$1,400
Traditional Indoor

Amerec is the American commercial-sauna stalwart — the heaters in a thousand gym saunas — and the Designer B is its residential wall unit, running about $1,400 street for the 8kW with built-in vulcanite rocks and mechanical controls. Like the Harvia KIP, this is a heater for people building their own room, and r/Sauna treats the two as interchangeable answers: buy whichever is cheaper the week you're shopping. Owners like the commercial-duty elements and the dead-simple time/temp knobs; the practical knocks are the same as every wall heater — modest stone capacity means sharper, shorter steam than a pillar heater, and the included vulcanite rocks are serviceable but many owners swap in proper olivine stones. US-based parts and support is a quiet advantage when an element dies in year six and you want a replacement without importing anything.

Commercial-pedigree US brandBuilt-in mechanical controlsStraightforward DIY-room pairing
8kW heater
Best for: DIY room builders who want a proven American heater with easy domestic parts availability.
Specs, install & tradeoffs
Harvia KIP 6kW Sauna Heater
$1,010
Traditional Indoor

If you ask r/Sauna what heater to put in a DIY build, the KIP is the default answer — a stainless Finnish workhorse that shows up in half the home-built saunas posted there. This is the heater, not a sauna: you supply the room (converted closet, shed build, kit cabin) and the KIP supplies proper löyly. Owners love the simplicity — mechanical timer and thermostat on the B version, nothing to break — and the dual-wall shell that stays touchable outside. Real-world notes: the 1-hour run timer is a Finnish safety convention that annoys Americans used to set-and-forget, stone loading matters more than people expect (wash and stack loosely), and you must get the 240V/30A circuit wired properly. At around $1,010 it's the cheapest path to a genuine traditional sauna if you can build the box.

r/Sauna's default DIY heaterStainless dual-wall Finnish buildSimple mechanical controls
6kW heater
Best for: DIY builders converting a closet, shed, or custom room into a proper Finnish sauna.
Specs, install & tradeoffs
Maxxus Trinity 3-Person Corner Infrared Sauna
$2,699
Infrared
4.4(250)

The Trinity is Golden Designs' clever-footprint play: a corner-format three-seater at $2,699 (list $3,833) that tucks into the dead angle of a garage gym or basement where rectangular cabins won't fit. The 'Dual Tech' pitch mixes seven ceramic and carbon emitters — ceramic runs hotter and more focused, carbon spreads gentler warmth — plus a floor reflexology heater, red-light chromotherapy, and Bluetooth. Owners report it as a meaningful step up in heat intensity from all-carbon budget boxes. The same house caveats as its Dynamic siblings apply: 'low-EMF' is the marketing tier below the brand's own 'Near Zero' models (which quote under 3 mG only when measured inches from panels), warranty terms shift by retailer, and the hemlock paneling is budget-grade. r/Sauna's take on the whole Golden Designs catalog: functional sweat boxes, priced honestly, marketed optimistically.

Corner footprint saves spaceCeramic + carbon dual heatFloor reflexology heater
3-personLow-EMF claimed
Best for: Space-constrained basements and garage gyms needing a three-person IR box in a corner.
Specs, install & tradeoffs