The MW20 is the largest sauna in the Mande Spa USA collection, purpose-built for 5 to 6 people who want a genuine European wellness experience right in their own backyard. Crafted in Lithuania from premium ThermoWood® - thermally modified timber renowned for its exceptional moisture resistance, dimensional stability, and long-term durability - this sauna is engineered to stand up to the elements season after season. The MW20 pairs authentic Old World craftsmanship with thoughtful modern details: tempered glass, built-in LED lighting, and your choice of electric or wood-burning heat. Whether you're unwinding after a long day or hosting friends for a traditional sauna ritual, the MW20 delivers a spa-grade experience that feels as good as it looks. It can also be adapted for indoor installation in a properly ventilated, dedicated space, giving you flexibility in how and where you place it.
Key Features
Capacity - 5 to 6 People: Generously sized interior comfortably seats a full group for a communal sauna session.
ThermoWood® Construction: Thermally modified timber offers superior moisture resistance, dimensional stability, and rot resistance for outdoor longevity.
Made in Lithuania: European artisan craftsmanship with strict quality standards - not mass-produced.
Harvia Heater Options: Choose the Harvia KIP 8.0kW electric heater (with built-in or Xenio WiFi controller) or the Harvia M3 wood-burning stove for an authentic log-fired sauna experience.
Dimensions - 6' 5 3/4" x 6' 6 3/4" x 6' 11 1/2": Spacious footprint and ceiling height provide a comfortable, open feel inside.
Tempered Glass: Durable, safety-rated glass door and panels bring natural light into the cabin and add a modern aesthetic.
LED Lighting: Built-in LED lighting creates an inviting ambiance for evening sessions.
Indoor or Outdoor Use: Can be installed outdoors or adapted for indoor installation in a dedicated, properly ventilated space (electric heater required for indoor use).
Customizable Exterior Frame: The exterior frame can be stained or finished in any color of your choice to match your home or landscaping.
5-Year Structural Warranty: Full warranty coverage gives you peace of mind for years to come.
Shipping
This product requires additional shipping. If you'd like a quote before you purchase, fill out the form on this page or email us at service@omahasportsandgames.com for a delivery ETA or to confirm shipping details.
Harvia heater of your choice (electric KIP 8.0kW or wood-burning M3 - confirmed at quote)
Tempered glass door and panels
LED lighting
Roof shingles and exterior finishing components (for outdoor installation)
Assembly plan and floor plan documentation
Why You'll Love It
The MW20 ThermoWood® is built for people who take their wellness seriously and want a sauna that will perform beautifully for decades. ThermoWood® is trusted across Scandinavia and Northern Europe precisely because it holds up where ordinary wood fails - resisting warping, swelling, and decay even through harsh winters and humid summers. The Harvia heater lineup is the gold standard in sauna heating, and having the option of WiFi control or a classic wood-burning stove means you can tailor the experience to your lifestyle. Professional assembly is available within 100 miles of the warehouse, so you don't have to figure it out alone. Backed by a 5-year structural warranty and made by skilled craftspeople in Lithuania, the MW20 is an investment in your home and your wellbeing that you'll enjoy for years to come.
Product Specifications
View Product Specs
Capacity
5-6 people
Dimensions
6' 5 3/4" x 6' 6 3/4" x 6' 11 1/2"
Construction Material
ThermoWood® (thermally modified timber)
Origin
Made in Lithuania
Heater Options
Harvia KIP 8.0kW electric (built-in or Xenio WiFi controller) or Harvia M3 wood-burning
Glazing
Tempered glass door and panels
Lighting
Built-in LED
Indoor Use
Yes - with electric heater and proper ventilation (select exterior components omitted)
Warranty
5-year structural warranty
Assembly
Professional assembly available; quote provided on request
What is ThermoWood® and why does it matter for an outdoor sauna?
ThermoWood® is timber that has been thermally modified at high temperatures without chemicals. This process dramatically reduces the wood's ability to absorb moisture, which means it resists warping, swelling, cracking, and rot - all common problems for outdoor structures. For a sauna that faces rain, snow, humidity, and intense heat cycles, ThermoWood® is one of the best materials you can choose. It's widely used across Scandinavia and Northern Europe for exactly this reason.
Can the MW20 be installed indoors?
Yes. The MW20 can be adapted for indoor installation in a dedicated space with proper ventilation and suitable flooring. When installed indoors, certain exterior components - such as the roof shingles, metal bands, and rear exterior siding - can be omitted. For indoor use, the sauna must be operated with an electric heater only (not the wood-burning stove). Contact us before ordering if you're planning an indoor setup so we can help you plan accordingly.
Which heater should I choose - electric or wood-burning?
Both are excellent options made by Harvia, one of the world's leading sauna heater brands. The electric Harvia KIP 8.0kW is the most convenient choice - it heats up quickly, can be controlled with a built-in panel or the optional Xenio WiFi controller from your phone, and is required for any indoor installation. The Harvia M3 wood-burning stove delivers a more traditional, authentic sauna experience with a crackling fire and naturally generated steam. If you value convenience and modern control, go electric. If you love the ritual and aroma of a wood-fired sauna and are installing outdoors, the M3 is a wonderful choice.
Does the MW20 include professional assembly?
Professional assembly is available and included for customers within 100 miles of the warehouse. For locations outside that radius, assembly pricing is provided on a quote basis. Assembly details are confirmed during the ordering process - just reach out and we'll get you sorted.
Can I customize the exterior color or finish?
Yes. The exterior frame of the MW20 can be stained or finished in any color of your choice. The black frame shown in product photos is simply one example of how customers have finished their sauna. ThermoWood® accepts stain and exterior finishes well, making it easy to match your home's aesthetic.
What does the 5-year structural warranty cover?
The 5-year warranty covers the structural integrity of the sauna - meaning the ThermoWood® cabin, joinery, and framing. Heater warranties are provided separately by Harvia. If you have specific warranty questions before purchasing, email us at service@omahasportsandgames.com and we'll get you the full details.
