ThermaSol PROI-140

PRO Series I Essential Steam Shower Generator, 8kW w/Fast Start


ThermaSol's PRO Series Steam Shower Generators combine the latest technology with ThermaSol durability, performance, and efficiency to ensure a consistent steam shower experience every time. Featuring Constant Steam, Split Tank, and Fast Start exclusive technologies, the ThermaSol PROI-140 is a 8kW home steam shower generator designed for steam baths with dimensions 85 to 140 adjusted cubic feet (ACF). A welcome addition for any bathing enthusiast, The PROI Series has reset expectations for achieving modern wellness at home.

Required control package sold separately

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If you see a lower price on the ThermaSol PROI-140 steam generator, call us, and we'll match it, plus 10% of the difference!


The all-new ThermaSol PROI-140 is engineered for home steam rooms with dimensions measuring 85 to 140 adjusted cubic feet (ACF). The PROI-140 8kW steam bath generator accepts voltage in the range of 208V-240V, single-phase (1-PH) configuration.

ThermaSol Pro I Series generators are designed to provide years of dependable, maintenance-free operation. The PROI-140 is constructed of corrosion-resistant stainless-steel throughout and includes professional-quality heating elements.

The PROI-140 steam shower unit provides a consistent home steam spa experience by generating steam at a constant rate with state-of-the-art efficiency technology. The unit includes the innovative Fast Start feature for quicker heat-up times.

The generator's split tank design enhances the longevity of the unit by separating the heating function from the water feed function. The PROI-140 features intelligent CAN Bus technology for reliable two-way communication between the generator and control.

The PROI-140 is compatible with the Thermatouch, Signatouch, Microtouch, Signature Control, Easy Start, Wellness Package, and Digital Shower Package. Select the available control or control package with features that best suit your bathing preferences.

The PROI-140 steam bath generator can be paired with the Serenity Light and Music Series, Hydrovive Series, and other ThermaSol steam shower accessories.

Pro I Series generators can be installed up to fifty feet away from your steam shower enclosure. Typical installation locations include closets, cabinet vanities, climate-controlled attics, and basements.

The PROI-140 generator carries ThermaSol's limited lifetime warranty and is fully serviceable. All ThermaSol steam units are UL and CSA listed for your safety.

Note: Generators sizing are listed based on Thermasol's theory on "Simple Sizing" of Cubic Feet = Length X Width X Height. No adjustments for materials.

  • Constant steam flow
  • Constant steam rate
  • No steam lag
  • No steam burst
  • FastStart Technology (exclusive) - steam in seconds, not minutes
  • Works with HydroVive and Serenity systems
  • Two way digital CAN-bus Technology (exclusive)
  • Split Tank longevity through design
  • 240V/1PH operation
  • For steam rooms 85 to 140 adj. cu. ft.
  • Superior heating elements-Incoloy low watt density
  • Stainless Steel construction
  • Designed, engineered, and crafted in the U.S.A
  • Dimensions: 18" L x 23"W x 14" H
  • Lifetime Warranty
  • 8kW Steam generator
  • In-line water screen kit
  • Steamhead housing installation tool
  • Steamhead housing and cable kit
  • 208-240 volt power cord (5ft)
  • 50' CAN-bus cable for the controller
  • Installation instructions
  • Static cling warning label
  • Warranty
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Model PROI-140
Kilowatt Rating 8 kW
Maximum Cubic Feet 140 FT
Amperage 37
Heater Weight 40 lbs
Water Inlet 3/8" NPT
Steam Outlet 1/2" NPT
Safety Valve 3/4" NPT
Electrical Connection NEMA 6-50P
Width 18"
Depth 23"
Height 14"
Required for Operation
ThermaTouch Control 10" Package

Designed for use inside the steam shower, the ThermaSol ThermaTouch 10" LCD in-shower touchscreen controller manages all aspects of the smart shower and steam generation, including steam duration and temperature. You can access a variety of popular apps while setting the steam, lights and music to your exact preferences.

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ThermaTouch Control 7" Kit w/SteamVection

The ThermaSol TT7-SV control kit was designed for installation inside the steam shower, the waterproof ThermaSol ThermaTouch 7” LCD control kit provides convenience and complete control of the steam bathing experience.

Includes Control and Steamhead with a variety of styles and finishes.

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Signature Series Kit, Modern Recessed Style SV Square

Designed for use with the ThermaSol Pro Series or AF Series of steam generators, the ThermaSol Signature Series control kit allows users to control time and temperature settings, on/off and pause modes, lighting, and music from inside the steam shower.

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MicroTouch Control w/SteamVection Steamhead

The ThermaSol MTSV offers control of steam room functionality from inside the steam shower. This package includes MicroTouch Control and SteamVection Steamhead. Available in multiple styles and finishes.

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PRO Series Steam Generator Drain Pan

Designed for the unlikely event of a slow water leak, the ThermaSol Drain Pan installed beneath the steam generator will aid in the trapping and redirecting of this water to an acceptable and predetermined area.

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