Lumina Cube sauna – Where light meets heat

Lumina Cube – modern outdoor sauna

The Lumina Cube is a compact yet high-performance outdoor sauna designed for modern gardens, terraces, and private spa areas. Its distinctive circular glass façade is not just a design feature — it is engineered to improve airflow, heat distribution, and structural durability.

Built from thermally modified Nordic wood, this sauna is made to withstand demanding outdoor conditions while maintaining long-term stability and performance.

The “O” glass design advantage – Optimized airflow and better sauna experience

Unlike traditional full-glass saunas, the Lumina Cube is designed for efficient air circulation. Fresh air is drawn in directly below the heater, allowing it to pass over the hot stones before rising and circulating evenly throughout the sauna. This results in more balanced heat and a more comfortable steam experience, while preventing cold air from accumulating inside.

At the same time, the circular front structure enhances the overall strength of the sauna. Stainless steel bands compress the construction evenly, helping to minimize air gaps over time and improve resistance to temperature and humidity changes. The result is a tight, durable, and long-lasting sauna body.

Key features:

• Modern and elegant cube-shaped design
• Large glass surfaces that allow plenty of natural light
• Cozy and relaxing atmosphere
• High-quality and durable materials
• Suitable for year-round use
• A solution that is both practical and visually appealing

Technical data:

• External dimensions: 216 × 216 × 160 cm (W × H × D)
• Weight: ~450 kg
• Internal volume: ~6.4 m³
• Walls: 42 mm Nordic thermowood pine
• End walls: 27 mm CLT (Cross-Laminated Timber)
• Benches: Alder wood
• Bench dimensions:
  Upper: 195 × 55 cm
  Lower: 195 × 42 cm
• Glass: 8 mm tempered bronze glass
• Roof: Bitumen shingle roofing system
• All the wooden parts are natural untreated wood.

The sauna is delivered as a complete flat-pack kit, designed for easy transport and installation.

Logistics:

• Pallet size: 205 × 205 × 45 cm
• Weight: ~450 kg
• Components can be carried individually after unpacking

Assembly:

• All parts are pre-cut and ready
• No additional cutting required
• Assembly time: ~1 weekend (2 people)

The package includes all structural components required to build the sauna:

• Pre-cut thermowood wall boards
• CLT end walls
• Full round glass front (door + curved glass panels)
• Self-adhesive roofing felt
• Black bitumen shingle roof kit
• Exterior finishing boards
• Base frames
• 2 sets of wooden ventilation hole covers (inside and outside)
• Two-level alder benches
• Stainless steel tension bands
• Screws and fasteners
• Silicone for glass installation

Note: Heater and stones are not included.

Heater recommendation:

• Recommended: 6 kW electric heater (e.g. HUUM DROP 6 or similar)
• Heating time: ~60 minutes
• Compatible with wood-fired heaters (e.g. Harvia M3 or similar)

The Lumina Cube sauna combines modern design, smart engineering, and durable materials in a compact form. It is an ideal choice for those seeking a visually striking outdoor sauna that delivers efficient airflow and heat performance, while maintaining a space-saving footprint and long-lasting thermowood construction.