Steam shower generators are the engine behind one of the most effective home wellness upgrades available today. The right generator turns your existing shower into a full spa experience—hydrating skin, easing muscle tension, supporting recovery, and creating a moment of genuine calm in your daily routine.
We carry ThermaSol’s PRO Series III generators because they set the standard for what a residential steam generator should be. Patented technology, industrial-grade construction, and exclusive features you won’t find anywhere else—all backed by a Lifetime Warranty. Whether you’re building a new steam shower or upgrading an existing setup, we’ll help you find the right fit for your space.
The ThermaSol PRO Series III — Generators Built for Serious Wellness
ThermaSol has been engineering residential steam since 1958, and the PRO Series III is the pinnacle of everything they've learned. These are the most technologically advanced home steam generators available today — loaded with features that are exclusive to ThermaSol and backed by a Lifetime Warranty that no other manufacturer in the industry currently matches.
Every PRO Series III generator is built around three core technologies: Smart Steam, FastStart, and PowerFlush. Smart Steam is the only patented temperature control system of its kind in the world, delivering consistent, comfortable heat from the moment you step in. FastStart means steam in seconds, not minutes. PowerFlush automatically flushes mineral buildup and sediment from the tank after each use — the leading cause of generator wear — so your investment performs at its best for the long haul. Each unit is constructed with an industrial-grade stainless steel tank, includes a stainless steel drain pan, and can be installed up to 50 feet from the shower enclosure.
Choose Your Generator
The ThermaSol PRO Series III Ultimate Steam Shower Generator w/Fast Start, PowerFlush and Smart Steam is ThermaSol's most complete generator — the full suite of exclusive PRO Series III technology in a single unit, purpose-built for consistent daily use. Constant steam at a constant rate, CAN BUS technology, Split Tank design, and SmartSteam temperature control, all working together seamlessly.
For mid-to-large enclosures, the ThermaSol PROIII-240 Pro Series Ultimate Steam Generator — 10kW steps up the output while keeping every PRO Series III exclusive feature intact. And for the largest residential steam showers, the ThermaSol PROIII-395 Pro Series Ultimate Steam Generator — 11kW is rated for enclosures up to 240 cubic feet — the same premium engineering, scaled up for the space your build demands.
Go Further with a Wellness Package
If you want a complete, turnkey steam experience rather than just the generator, ThermaSol's Wellness Packages take things to the next level. The ThermaSol Wellness Steam Package with SignaTouch combines a smart touchscreen control with the SteamVection steam head — ThermaSol's convection-style steam delivery system that creates uniform, floor-to-ceiling heat. You get seamless adjustment of steam temperature, lighting, music, and more from a single intuitive panel.
For a fully immersive shower-and-steam setup, the ThermaSol Wellness Shower Package with SignaTouch adds a digital shower valve and your choice of HydroVive or Serenity rainhead into the mix — blending water, steam, light, and audio into one cohesive system. Both packages are available with your choice of SignaTouch or ThermaTouch smart control panel.
Every product we carry ships free within the US with no sales tax, and every purchase is backed by our 100% price match guarantee. Not sure where to start? Our team is here to help you size your generator, confirm electrical requirements, and make sure you're choosing the right setup for your space before you buy.
FAQs
How do I know what size steam generator I need?
Generator sizing is based on your shower's cubic footage — length × width × height. Materials matter too: marble, stone, and glass each affect how your enclosure holds and loses heat. As a general guide, plan for roughly 1kW per 45–50 cubic feet. The PROIII-240 at 10kW and the PROIII-395 at 11kW are rated for larger enclosures up to 240 cubic feet. Still unsure? Contact us and we'll help you size it correctly before you buy.
How far from the shower can the generator be installed?
ThermaSol PRO Series III generators can be installed up to 50 feet from the shower enclosure, giving you the flexibility to tuck the unit into a nearby closet, cabinet, or utility space — completely out of sight without any compromise in performance.
How quickly does steam start?
With ThermaSol's FastStart Technology, steam arrives in seconds rather than the several minutes typical of a standard generator. Step in and it's ready.
How does the self-cleaning system work?
ThermaSol's PowerFlush system handles maintenance automatically. After each use it flushes mineral deposits and sediment from the tank — without any manual intervention needed. It's the most advanced self-cleaning system in residential steam, and it's exclusive to ThermaSol.
What's the difference between a generator and a wellness package?
A generator is the core unit that produces steam. A wellness package bundles the generator with a smart touchscreen control and steam head — and in the case of the Wellness Shower Package, a digital shower valve and rainhead as well. Packages are a great option if you want everything matched and integrated from the start.