ThermaSol Lumaria 5-Person Indoor Sauna Cabin with Panoramic Glass Solarium Design
Most indoor saunas are dark wooden boxes. The Lumaria isn't. ThermaSol designed it as a true solarium with floor-to-ceiling panoramic glass extending across two outer walls, the cabin feels open and architectural rather than enclosed. It transforms a corner of your home into a destination, not just a wellness fixture tucked behind a closed door.
Materials that age well
The interior is finished in brushed Tyrol wood, a tactile, warm-grained spruce variant that develops a deep character over time. Benches and arched backrests are built from thermo-aspen a knot-free wood that stays cool to the touch even at peak heat, so longer sessions never become uncomfortable. Multi-layer wood fiber insulation runs throughout the structure, holding heat efficiently and keeping energy use predictable.
Performance from a name that knows steam
The Harvia Virta 9kW electric heater is the heart of the system, paired with the CX45 digital control for precise temperature and timing. It generates abundant steam quickly and holds temperature consistently, even with the larger glass surfaces. The frameless, flush-mount glass door completes the look clean lines outside, full thermal seal inside.
Color therapy, built in
RGB color therapy LEDs are recessed throughout the interior, with a dedicated control to fine-tune the ambiance. Whether you want a clinical white for a focused session or a warm amber for unwinding, the lighting adapts to match the mood. It's a small detail that quietly changes how you use the sauna.
A panoramic glass solarium for your home the Lumaria brings light, openness, and Scandinavian warmth into every session. Floor-to-ceiling glass on two walls, brushed Tyrol wood, and a 9kW Harvia heater come together in a sauna that's as architectural as it is restorative.
Up to 5 persons Indoor use Panoramic glass solarium Limited Lifetime warranty Harvia 9kW heater RGB color therapy lighting Authorized ThermaSol dealer
Lumaria sauna cabin (fully assembled)
Floor-to-ceiling panoramic glass walls
Frameless flush-mount glass door
Brushed Tyrol wood interior walls
Thermo-aspen benches and backrests
Multi-layer wood fiber insulation
Harvia Virta 9kW electric heater
CX45 digital sauna control
RGB color therapy LED lighting
LED control unit
Panoramic glass solarium
Floor-to-ceiling glass on two outer walls creates an open, light-filled atmosphere unlike any traditional enclosed sauna design.
Corner-friendly layout
Designed to integrate naturally into a corner of your home efficient use of space without compromising on capacity.
Brushed Tyrol wood interior
A warm-grained spruce variant with tactile depth and natural elegance. Develops character beautifully with use.
Thermo-aspen benches
Knot-free, splinter-free, and stays cool to the touch even at peak heat. Built for comfort across long sessions.
Harvia Virta 9kW heater
A premium Finnish-engineered heater paired with the CX45 digital control. Quick heat-up, steady performance, intuitive operation.
RGB color therapy
Recessed LEDs throughout the interior with full color control. Create the right mood for focus, relaxation, or recovery.
About ThermaSol
Built for the home, engineered for performance
ThermaSol set out to bring spa-grade saunas and steam systems into private homes without sacrificing the build quality, performance, or design integrity that defines commercial-grade wellness installations. Every Lumaria is fully assembled at the factory and shipped ready to use.
The Lumaria represents what happens when premium materials meet thoughtful engineering: a sauna that performs like a flagship spa, looks like a piece of contemporary architecture, and is backed by a manufacturer with serious heritage in the category.
Everything you need before and after installation
Download the official ThermaSol installation manual below. We recommend reviewing it before your delivery arrives so you know what to expect on installation day. Note that a licensed electrician is required for the heater installation.
Lumaria Installation Manual (PDF)
Limited Lifetime Warranty on craftsmanship and structure
ThermaSol stands behind the Lumaria with a tiered warranty program designed to protect every part of your investment. The cabin's craftsmanship and structural integrity are covered by a Limited Lifetime WarrantyΒ the highest level of protection available in the category. The Harvia Virta heater components are covered for 5 years, and heating elements for 1 year. All warranty claims go directly through ThermaSol with full factory support. Proof of purchase from an authorized dealer is required to start any claim and we are an authorized ThermaSol dealer.
