ThermaSol PROIII-140

PRO Series II Ultimate Steam Shower Generator, 8kW w/Fast Start, PowerFlush and Smart Steam


Featuring Constant Steam, Split Tank, Fast Start, and PowerFlush exclusive technologies, the ThermaSol PROIII-140 is a 8kW home steam shower generator designed for steam baths with dimensions 85 to 140 adjusted cubic feet (ACF). 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. A welcome addition for any bathing enthusiast, The PROIII Series raises the bar with an advanced cleaning system, stainless steel drain pan and is the only model to offer the ultimate Smart Steam (patented) technology, eliminating temperature fluctuations.

Required control package sold separately

Your Price

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


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

The ThermaSol PROIII-140 generator includes durable stainless-steel construction, professional-grade heating elements, advanced PowerFlush self-cleaning system, Smart Steam temperature control, Fast Start technology, stainless-steel drain pan, and a variety of other features.

PRO Series generators are engineered to provide the most consistent, pleasurable bathing experiences. The innovative Smart Steam feature helps ensure that steam is delivered at a constant rate without lags, bursts, and temperature fluctuations. The included FastStart technology provides quicker heat-up times.

The steam unit's split tank design helps ensure the longevity of the unit by separating the heating function from the water feed function. The generator includes the PowerFlush pressurized inner tank cleaning system which helps prevents harmful sediment build-up.

ThermaSol PRO Series generators are equipped with advanced CAN Bus technology for reliable two-way communication between the generator and the control.

ThermaSol PRO Series generators are 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 suits your bathing preferences.

The PROIII-140 is designed so that steam shower accessories such as the Serenity, Light, Sound, Rainhead can easily be installed.

The PROIII-140 steam shower unit can be installed up to fifty feet away from your steam shower enclosure. Common installation locations include closets, vanity cabinets, climate-controlled attics, and basements.

The PROIII-140 residential steam generator carries ThermaSol's limited lifetime warranty and is fully serviceable. ThermaSol steam generators 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
  • Smart Steam Technology (patented) - eliminates temperature fluctuations
  • FastStart Technology (exclusive) - steam in seconds, not minutes
  • PowerFlush Technology (exclusive) - pressurized inner tank system to remove sediment
  • Works with HydroVive and Serenity systems
  • Two-way digital CAN-bus Technology (exclusive)
  • Split Tank longevity through design
  • Includes stainless steel drain pan
  • Pre-plumbed safety relief valve
  • 1/2" union to connect to steam line
  • Braided stainless steel water connector
  • 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
  • Stainless steel drain pan
  • 3/8" braided stainless steel hose & fitting
  • In-line water screen kit
  • Pre-plumbed safety relief valve
  • 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
Swipe horizontally to reveal full table content.
Model PROIII-140
Kilowatt Rating 8 kW
Maximum Cubic Feet 140 ACF
Amperage 37
Heater Weight 44 lbs
Water Inlet 3/8" Compression
Steam Outlet 1/2" NPT
Drain Pan 3/4" NPT
Safety Valve Pre-Plumbed
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.

Your Price
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.

Your Price
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.

Your Price
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.

Your Price