About us

About us

Pure Belgian sauna design.

Owner Mario Mertens founded Thermalux in 2009. In the meantime, the Belgian company has grown into a successful family business in which his daughter and wife are also active.

We have always sold directly to the end customer, even beyond the borders of Europe. In 2021, however, we made the switch to a B2B environment, growing strongly as a manufacturing company and focusing on sales through dealers and partners.

At the end of 2023, a new marketing concept was launched, resulting in even more customizable products and opportunities.

We look to the future with confidence.


Always one step ahead.

In 2009, we converted the classic-looking infrared sauna into a modern cube. Since then we have been in a creative flow, developing more and more new designs, always looking for new materials and possibilities.

In addition to its appearance, each sauna is a technical wonder, with a high level of engineering behind it.

We strive for top quality, in a world where luxury is a way of life.

Intellectual property.

We are very proud of our designs. We have put a lot of time, money and energy into development. That is why we have technical patents and design protections. It assures our dealers of their smart investment in us.