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ThermaSol PROI-140

ThermaSol PROI-140

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

Model: PROI-140

SKU: PROI-140

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

Regular price $3,125.00 USD
Regular price Sale price $3,125.00 USD
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  • Description
  • Features
  • Includes
  • Specifications
  • Technical

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

ModelPROI-140
Kilowatt Rating8 kW
Maximum Cubic Feet140 FT
Amperage37
Heater Weight40 lbs
Water Inlet3/8" NPT
Steam Outlet1/2" NPT
Safety Valve3/4" NPT
Electrical ConnectionNEMA 6-50P
Width18"
Depth23"
Height14"

Installation and operation manual:

Parts and accessories diagram:

PRO Series Overview