Innovation Meets Restoration.
Thermasol’s solar-powered sauna, Solaris, has been recognized by TIME as one of the Best Inventions of 2025 — a milestone for sauna innovation and for the growing movement of sustainable wellness at home.
Each year, TIME editors spotlight products and technologies that are “making the world better, smarter, and a bit more fun,” assessing originality, ambition, efficacy, and impact. To be included among global leaders in design and innovation underscores the vision behind Solaris: bringing wellness, sustainability, and freedom together through thoughtful design.
Read the full list on TIME.com →
A New Era of Off-Grid Wellness
Solaris is the first fully solar-powered sauna available in the U.S., designed for those who seek both sustainability and serenity. The sauna operates entirely off-grid, with the sun charging a built-in battery system that powers the heater. Once fully charged, the sauna can provide two to three hours of use — and in sunny weather, runtime extends up to five hours through a blend of stored and direct solar energy.
A solar-tinted panoramic glass wall welcomes natural light while maintaining privacy, creating a seamless connection to the outdoors. Inside, refined surfaces and modern materials simplify maintenance while elevating the overall experience — embodying Thermasol’s design philosophy that wellness should be as beautiful as it is functional.
Design, Innovation, and Wellness — in Balance
“Solaris is the first solar-powered sauna of its kind in the U.S., and it reflects Thermasol’s commitment to innovation that enhances wellness while embracing more sustainable solutions,” said Nick Larrick, Head of Region, North America, Harvia. “It’s about creating the same restorative sauna experience our customers expect, while integrating thoughtful design and moving the industry forward in a responsible way.”
Solaris is part of a coordinated innovation within the Harvia family of brands — introduced in North America through Thermasol. While the technology is shared globally, Solaris has been positioned and tailored specifically for the U.S. market, combining solar energy with Thermasol’s legacy of design-forward, at-home wellness solutions.
Recognition That Reflects a Movement
This recognition from TIME marks a defining moment for Thermasol and for sauna innovation in the U.S. market. It affirms the growing demand for design-led, energy-conscious wellness experiences that fit seamlessly into modern living — and it highlights how far sauna culture has evolved, from a tradition of heat therapy to a pillar of sustainable luxury.
As Thermasol continues to expand its product offerings, the company remains focused on creating technologies that empower customers to design wellness into their homes — effortlessly, intelligently, and beautifully.
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