MW20 ThermoWood® Outdoor Sauna

Make your backyard the destination with the Mande Spa USA MW20 ThermoWood® Outdoor Sauna — the largest model in the Mande Spa lineup, with room for 5–6 people. Handcrafted in Lithuania from premium ThermoWood® (thermally modified wood), the MW20 is engineered for real-world performance — offering outstanding durability, superior moisture resistance, and dimensional stability that stands up beautifully year after year, season after season.

More than a sauna, the MW20 is a gathering place. The generous interior features ThermoWood® benches with ambient LED lighting beneath, while tempered glass doors and windows let natural light pour into the cabin. Whether you're unwinding solo after a long day or hosting friends and family, every session carries the warmth and authenticity of European wellness tradition.

Built for outdoor living, the MW20 can also be installed indoors with a properly dedicated space, adequate ventilation, and suitable flooring. For indoor setups, several exterior components — including roof shingles, metal bands, and rear exterior siding — can be left off during assembly, as they're designed primarily for outdoor weather protection. Indoor installations require an electric heater only for safe, clean, and code-compliant operation.

Please note: The black frame shown in product photos is simply an example of how you can stain or finish the exterior frame. You're welcome to customize using any stain color you'd like to complement your indoor or outdoor design.

Key Features

• 5–6 person occupancy — the largest in the Mande Spa USA collection
• Handcrafted in Lithuania with authentic European craftsmanship
• ThermoWood® construction with high resistance to moisture and decay
• ThermoWood® benches with LED lighting underneath
• Tempered glass doors and windows
• Integrated ventilation system
• Bituminous roof tiles
• Suitable for outdoor or indoor installation (electric heater required indoors)
• 5-year warranty

Specifications

• Model: MW20
• Capacity: 5–6 persons
• Type: Outdoor sauna (indoor-adaptable)
• Exterior dimensions (L×W×H): 6.47 ft × 6.56 ft × 6.96 ft
• Interior dimensions: 5.74 ft × 6.30 ft
• Wall thickness: 1 11⁄16"
• Material: ThermoWood® (thermally modified wood)
• Benches: ThermoWood® with LED lighting underneath
• Doors and windows: Tempered glass
• Roof: Bituminous roof tiles
• Ventilation: Integrated system
• Lighting: LED under-bench lighting
• Weight: 1,565 lbs
• Durability: High resistance to moisture and decay
• Warranty: 5-year structural / 2-year heater and electrical