ThermaSol PRO Series Comparison: PRO I vs PRO II vs PRO III — Which One Fits Your Home Spa?

When it comes to luxury steam showers, ThermaSol stands at the forefront of innovation, craftsmanship, and wellness technology. But with three distinct models in the PRO Series — PRO I, PRO II, and PRO III, choosing the right one for your home can be tricky.

In this guide, we’ll break down the key differences between the models, explain which one suits your space, and help you make an informed investment for your home spa.

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A Quick Introduction to ThermaSol

ThermaSol has been a trusted name in the steam shower industry for over six decades. Known for their high-quality engineering and innovative smart steam systems, ThermaSol products are made in the USA and built for longevity.

(Photo Courtesy: ThermaSol)

Each generator is designed to deliver fast, consistent, and energy-efficient steam, creating a personalized spa experience right in your bathroom

ThermaSol PRO I Series – The Essential Performer

If you’re new to steam showers or setting up a smaller home spa, the ThermaSol PRO I Series is your best starting point.

It features ThermaSol’s FastStart™ technology, which delivers steam within seconds of turning on your system — no more waiting for your shower to warm up. Despite being the base model, it maintains the same build quality and reliability found across the PRO lineup.

Ideal for: Small to medium bathrooms
Power range: Up to 395 cubic feet
Price range: Around $ 2,800 – $4,300 USD
Best for: Homeowners seeking a compact, efficient, and long-lasting steam system.

ThermaSol PRO II Series – The Perfect Middle Ground

The ThermaSol PRO II Series offers a balance of power, performance, and smart functionality. It adds PowerFlush™ technology, an automatic self-cleaning system that keeps your generator running efficiently for years.

This model is a step up in performance and is ideal for those who use their steam showers regularly and value ease of maintenance.

Ideal for: Medium to large bathrooms
Power range: Up to 1200 cubic feet
Price range: Around $3,300 – $6,900 USD
Best for: Users who want automated maintenance and faster recovery times between sessions.

ThermaSol PRO III Series – The Ultimate in Luxury Steam

At the top of the lineup sits the ThermaSol PRO III Series — the brand’s flagship model, designed for homeowners who want the ultimate spa experience.

The PRO III comes equipped with SmartSteam™ technology, which intelligently modulates steam output to maintain consistent temperature and humidity throughout your session. It also includes both FastStart™ and PowerFlush™ technologies.

Ideal for: Large or multi-person steam rooms
Power range: Up to 1200 cubic feet
Price range: Around $4,000 – $7,600 USD
Best for: High-end wellness enthusiasts who want consistent, smooth, and energy-efficient steam quality.

Which ThermaSol Model Is Right for You?

Here’s a quick summary to help you decide:

Each ThermaSol model offers the same rock-solid reliability and build quality — the difference lies in performance, smart features, and the level of automation.

Our Verdict

If you’re designing a small or mid-sized bathroom, the PRO I will easily meet your needs.

For frequent users who appreciate low maintenance, the PRO II hits the sweet spot.

And if you’re building a true luxury home spa, go straight for the PRO III — it’s the best in class, hands down

💬 Join The Steam & Sauna Blueprint Community

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Connect with designers, wellness experts, and homeowners transforming their spaces into personal retreats. You’ll also get access to product guides, brand comparisons, and personalized recommendations from our team at Opulent Recreations.

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