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What Size Steam Generator Do You Need?

Start with your shower's length, width and height. ThermaSol sizes on volume and ceiling height. Mr. Steam's MS and MS Super manual also adjusts for wall material, adding 50 percent for natural stone such as marble. Our calculator applies each brand's rules and names the model for each.

✓ Volume in cubic feet ✓ Wall material and ceiling height ✓ A model from each brand
Use the Size Calculator
THERMASOL

PRO Series III steam shower generators

FastStart: "Steam in seconds, not minutes," in ThermaSol's words
PowerFlush: a self-cleaning system ThermaSol includes
Smart Steam: steady steam and precise temperature control, as ThermaSol describes it
Warranty: two-year limited in-home, then parts for life with factory service

ThermaSol sizes the PRO Series III on volume alone; its PRO Series III page states that "wall materials do not affect generator size." For a 9 ft ceiling, ThermaSol says to size up one model, and for a 10 ft ceiling to size up two or confirm the size with its team.

Each generator needs a 208 to 240 V single-phase supply on a dedicated breaker and can be installed up to 50 feet from the shower. ThermaSol lists a SteamVection kit and a stainless steel drain pan as included. On each product page, our configurator lets you choose the control, steam head and finish.

PROIII-84: 6 kW, showers up to 84 cu ft
PROIII-140: 8 kW, up to 140 cu ft
PROIII-240: 10 kW, up to 240 cu ft
PROIII-395: 11 kW, up to 395 cu ft
PROIII-575: 15 kW, up to 575 cu ft
PROIII-750: 20 kW, up to 750 cu ft
PROIII-1200: 24 kW, up to 1,200 cu ft
MR. STEAM

MS, MS Super and MAX steam shower generators

Express Steam: a factory-built version of each model that keeps the tank water warm
AutoFlush: an add-on that drains the generator two hours after each use
SteamLinx: a Wi-Fi module for control from Mr. Steam's app
Warranty: limited lifetime, with two years of in-home service, parts and labor

Mr. Steam's manual for its MS and MS Super generators adjusts the shower's volume before you choose a model: no change for ceramic or porcelain tile, plus 50 percent for natural stone, marble, shale, glass block or concrete, minus 40 percent for acrylic or fiberglass, and plus 15 percent for each foot of ceiling above 8 ft, up to 10 ft. Above the MS Super range the MAX series takes over, and we confirm MAX sizing with you before you order.

The generators run on 240 V single phase as standard, with 208 V and three phase on request, and the MS and MS Super manual allows up to 60 feet of insulated steam piping. A MAX installation needs at least two steam heads, and the MAX generator must not be hung on a wall. On each product page, our configurator lets you choose the start-up speed, control and steam head.

MS: MS90R 5 kW, MS150R 6 kW, MS225R 7.5 kW, MS400R 9 kW
MS Super: MSSUPER1R 10 kW, MSSUPER2R 12 kW, MSSUPER3R 15 kW
MAX: MX4R 20 kW, MX5R 24 kW, MX6R 30 kW

Both brands at a glance

Feature ThermaSol PRO Series III Mr. Steam MS, MS Super and MAX
Models we carry 7, from 6 to 24 kW 10, from 5 to 30 kW
Sizing rule Volume only; size up for a 9 or 10 ft ceiling Volume adjusted for wall material and ceiling height (MS and MS Super manual)
Faster start-up FastStart, a PRO Series III feature Express Steam, a factory-built version of each model
Self-cleaning PowerFlush, a PRO Series III feature AutoFlush, an add-on
Power supply 208 to 240 V single phase, dedicated breaker 240 V single phase as standard; 208 V and three phase on request
Generator to shower Up to 50 ft Up to 60 ft of insulated steam piping (MS and MS Super)
Control and steam head Control chosen in our configurator; ThermaSol lists a SteamVection kit as included with the generator Control chosen in our configurator; each control comes with a steam head
Generator warranty Two-year limited in-home warranty, then parts for life with factory service Limited lifetime: two years of in-home service, parts and labor, then parts for life
Manufacturer warranty: We are an authorized dealer for ThermaSol and Mr. Steam, and every generator we sell carries its manufacturer's warranty. Compare the warranty terms
Free Shipping On all orders to the contiguous US
Manufacturer Warranty Every generator carries its maker's warranty
Sizing Help Send your measurements and we size both brands
Authorized Dealer For ThermaSol and Mr. Steam
0% Financing Shop Pay & Affirm available at checkout
Configurator Choose the control and steam head on each product page

Need Help Choosing a Generator?

Send us your shower's dimensions, wall material and ceiling height, and a specialist will reply with the model each brand's rules call for and current pricing.

Free shipping to the contiguous US • Manufacturer warranty • 0% financing available