Thermasol Launches Solaris: The U.S.’s First Fully Off-Grid, Solar-Powered Sauna Cabin
Round Rock, TX, USA, July 22nd, 2026, FinanceWire
The U.S.’s first solar-powered, off-grid sauna Thermasol delivers a new era in outdoor sustainable wellness.
Lives today are more technologically tethered than any other generation in history. As a result, more and more people are seeking off-grid experiences—that is, moments of intentionally unplugging from modern connectivity.
These moments provide space for mindfulness, communion with nature, a detox for the senses, and a reawakening of the soul. Expressions of off-grid experiences can vary: from a few hours in the woods, to multi-day retreats, to full-immersion living arrangements that shun modern amenities in favor of homesteading practices.
Commonly, off-grid experiences are infused with wellness rituals such as meditation, mindful movement, and dietary detox. Saunas, in particular, have become a popular complement to the off-grid lifestyle, offering a high-sensation connection with one’s body. In the U.S. alone, the sauna market was forecast to grow by more than $151 million between 2025-2029 as homeowners and hospitality providers are no longer inclined to keep saunas discreetly out of sight. Quite the opposite, saunas are increasingly becoming both architectural and environmental in nature as they make their way out of basements and gym corners and into backyards and outdoor oases.
Most recently, sauna-users are even embracing sauna designs that reduce carbon footprint with solar-powered technology—a win-win experience that benefits the mind, body, and environment.
Leading the charge in this innovative space is Thermasol’s Solaris, the U.S.’s first off-grid solar-powered sauna, a breakthrough opportunity in the home wellness movement to combine off-grid wellness with ethical sustainability.
The Art and Science of Solar Power
Named one of the Best Inventions of 2025 by TIME, Solaris produces energy-conscious heating entirely without a power connection by integrating external solar panels with internal battery storage, making it ideal for not only home sanctuaries but also remote retreats, hillside estates, hospitality properties seeking to minimize infrastructure, and sites where running power is cost-prohibitive or architecturally undesirable.
The Solaris system heats to 170 degrees Fahrenheit in just 30-40 minutes, providing two-to-three hours of use (up to five hours on sunny days) through a blend of stored and direct solar energy. Solar-tinted panoramic glass windows preserve privacy while ushering in natural light to create connection to the outdoors. An elevated, tile-lined interior features brushed alder benches and UV-resistant cladding—embodying the Thermasol philosophy that wellness should be equally beautiful and functional.
“Solaris is a rare blend of design, innovation, and sustainability,” says Nathan Hagemeier, president of Harvia U.S., a family of brands that includes Thermasol. “Its classic Finnish design even allows for the option of incorporating a traditional Löyly, the Finnish practice of pouring water over heated stones to generate steam and humidity.”
Solaris is available in two sizes, accommodating 2-5 people, and is designed for luxury homes, retreat centers, and hospitality properties that prioritize sustainability alongside wellness.
“We’re seeing an uptick in homeowners and hospitality developers who are looking to create spaces that feel like an eco-friendly, luxury retreat,” says Hagemeier. “Solaris is the embodiment of sustainability without compromise.”
About Thermasol
Thermasol has led the evolution of steam and sauna technology since 1958 when it pioneered the first residential electric steam shower. Renowned for creating the foundation for the modern home spa, it transforms daily rituals into elevated wellness experiences. In 2024, Thermasol became part of the Harvia Group, the world's leading sauna and spa company, uniting American innovation in steam and smart wellness with Harvia's deep heritage in Finnish sauna culture and heater technology. Today, the brand designs luxury steam shower systems with digital smart controls and accessories, as well as sauna cabins and heaters trusted by homeowners, designers, builders, and hospitality professionals worldwide. Distinguished by professional-grade engineering, advanced digital planning tools, concierge-level support, and the industry's only true lifetime warranty on residential steam generators, Thermasol's commitment to innovation and service has earned recognition including TIME Best Inventions of 2025, multiple Decorative Plumbing & Hardware Association (DPHA) awards, a 2026 LUXE RED Award, and named a finalist in the 2026 Hospitality Design Awards. Users can learn more at Thermasol.com and follow @Thermasol on Instagram, Pinterest, Facebook and LinkedIn.
Contact
Thermasol - Sauna & Steamthermasol@thermasol.com
Disclaimer. This is a paid press release.