Celsium

Celsium saunas are the intersection of architectural design and traditional Lithuanian craftsmanship. Known for their distinct shapes—such as the cubic Jonas, the rounded Ula, and the Tauras Modular models—these saunas use premium materials like Shou Sugi Ban, Thermowood and Thermo Aspen. Every unit is designed to be a focal point in your garden, offering a luxury spa experience with high-end finishes like optional Shou Sugi Ban (charred wood) and Buster + Punch solid metal hardware.

All saunas in our Celsium collection are delivered exclusively as precision-engineered flat-pack kits. This delivery method is ideal for the UK market, as it ensures that even our largest models can be transported easily to your garden, regardless of restricted access like narrow side gates or standard doorways. Your sauna arrives securely palletized with all components precision-cut and ready for on-site assembly.

Because each Celsium sauna is made to order to your specific configuration (choice of wood, glass tint, and exterior finish), the standard lead time is 6 to 8 weeks. This timeframe allows for the handcrafted manufacturing process in Lithuania and secure transit to your UK address, ensuring your sauna meets our strict quality standards.

We are a dedicated UK reseller for Celsium Wellness. At this time, our delivery network, technical support, and warranty services are focused exclusively on customers within the United Kingdom and Ireland.

To ensure the longevity and structural integrity of your sauna, it must be placed on a solid, flat, and level foundation. We recommend a concrete pad, paving slabs, or a reinforced timber deck. A perfectly level base is essential during the assembly of our flat-pack kits to ensure that all panels and glass facades align correctly for a perfect, airtight seal. The base must be able to withstand the weight of the build plus the maximum capacity of occupants.

Most Celsium saunas are designed for high-performance electric heaters (such as those from HUUM or Harvia). These typically require a dedicated power supply with armored cabling. For safety and to comply with UK building regulations, the final connection must be completed by a qualified electrician. We recommend having this power supply ready at your site before your kit arrives. You can find our sauna electrical supply guide here.

Yes. As these are bespoke, made-to-order units, you can customise various elements at no extra cost! Including:

• Exterior Finish: Options like Shou Sugi Ban charred finish, Thermo Pine and premium Thrmo aspen
• Interior Wood: Choose from warm Aspen or Black Alder.
• Glass Facade: Select from Clear, Bronze, or Black Planibe, or full mirror glass, to manage privacy and aesthetics.
  
  

We primarily use Thermowood because it is heat-treated to be exceptionally stable. This process makes the timber resistant to rot, insects, and—crucially for the UK climate—moisture-related warping. It provides superior thermal insulation compared to standard wood, ensuring your sauna reaches temperature quickly and retains heat efficiently.