a DESIGN wooden outdoor SAUNA

A real Finnish wooden sauna that completely reflects the character of your garden. For anyone who loves natural materials, we designed the “ PUU “, which is Finnish for “ wood “.  This exquisite model is made entirely out of high-quality thermowood, inside and outside. Nothing left to do but to enjoy and relax in your own wooden sauna with a view of your own garden.  

Product characteristics

We built our PUU outdoor sauna out of thermowood. It has two floating benches, made from thermo ayous. All materials are heat and water resistant so your wooden sauna can easily overcome all types of weather conditions.

The PUU is also available with a passage, integrated shower, storage or fully housed with our other wellness products.

Our saunas are available in different versions. In addition to the standard Finnish sauna, we can also offer it as a bio sauna, also known as a sanarium.

The bio sauna or sanarium is a mildly warm sauna with typical temperatures between 45 and 60 degrees Celsius. The humidity is generally between 50 and 70 percent. Aroma infusions are typical of the bio sauna. The bio sauna is also called soft sauna, soft sauna or mild sauna because of the climate. It feels like a tropical heat, unlike the dry Finnish sauna.

The bio ovens we use therefore offer you a 3 in 1 solution. You can take a dry Finnish sauna, a Bio or tropical bath and an aroma bath, also in combination with infrared.


Inside the sauna, you can either go for an electrical stove or a wooden stove, so you’ll be able to intensely enjoy the pleasant heat and soothing sounds of crackling fire in the background.  

At the front, we place a large panoramic glass so you can stare into the sunset for hours to come. 

DIY lover? You can buy and install our PUU in no-time using our instruction video. 



Cannot wait to start designing and customizing your very own outdoor PUU sauna? Take a look at our brochure and be inspired. Would you like some more information or advice? Please, don’t hesitate to contact us for a custom quote.


reeds 2 maanden een PUU2 met infrarood en met houtkachel ; top product en top service ; prachtig design en plaats voor 6 zittenden (echt leuk) ; donkerglas aan te raden als je buren hebt !!
Jan Vanthuyne
Prachtige buitensauna; voortreffelijke service; we zijn er hartstikke blij mee. Een genot om naar te kijken en in te zitten. Dankjewel Mario!
Mariëlle Oomen-Hulst
Super tevreden over de mooie op maat installatie van Thermalux. Prima service en tot in de puntjes verzorgd. Heel tevreden klant. In deze moeilijke Corona tijden niet altijd evident!
Kato Maes
Le sauna a traversé la France et a été installé à Marseille ! Il séduit tous les hôtes de passage dans notre maison (y compris nous même très adepte des saunas). De très bonne facture et magnifiquement design il s'intègre parfaitement dans notre jardin. Je recommande vivement.
Christine ROUX
I ordered my Thermalux sauna without having seen it in reality. A Belgian sauna to Sweden! I simply took a chance. But I was not disappointed. The sauna became "the cherry on the cake" at our retreat by the lake.
Ulf Wahlström
Prachtig product! We genieten dagelijks van de luxe en rust die onze Thermalux sauna geeft. De berging is ruim en het cederhout zeer proper afgewerkt. Een aanrader!
Jonathan de Ramaix
De bestelling en de plaatsing van onze IR sauna verliep zeer vlot. Ook enkele kleine aanpassingen nadien werden vakkundig opgelost. Goede service dus van begin tot einde.
Christophe Jacobs