Leil Black Cube Comfort 6 Person Outdoor Traditional Finnish Sauna

Spacious 6-Person Layout

Designed for up to 6 bathers, the Comfort model gives you a more generous sauna interior than the more compact Black Cube Classic.

Opposing Bench Design

The face-to-face bench layout makes the sauna feel more social and comfortable, especially for families, guests, and longer evening sauna sessions.

Premium 40mm ThermoWood® Construction

The Black Cube Comfort is built from 40mm ThermoWood®, giving the sauna a solid, refined structure designed for outdoor sauna use.

Authentic Finnish Dry & Steam Sauna

Pair it with a traditional electric sauna heater and stones to enjoy both dry sauna heat and steam bathing with water over the stones.

Bold Black Cube Architecture

The dark exterior, modern cube form, and signature Leil design create a striking backyard focal point.

Expansive Black Tempered Glass

The large glass front brings natural light into the sauna and gives the exterior its refined modern appearance.

Designed for Year-Round Outdoor Use

The Black Cube Comfort is built as an outdoor sauna kit for backyard wellness spaces, patios, and private home retreats.

Handcrafted in Estonia

Leil saunas are crafted in Estonia, bringing European sauna design and authentic sauna tradition into a premium outdoor kit format.

What Makes the Leil Black Cube Comfort Different?

A Modern Outdoor Sauna Built for Connection

The Black Cube Comfort is not just a larger sauna. It is designed around the experience of sharing sauna with others.

The expanded depth and opposing benches create a natural space for conversation, quiet relaxation, and shared wellness rituals. The modern black exterior and glass-forward design make it feel architectural from the outside, while the warm ThermoWood® interior keeps the sauna experience grounded in traditional Finnish bathing.

For customers who want a modern outdoor sauna that feels spacious, social, and premium without moving into a massive footprint, the Black Cube Comfort is one of the strongest options in the Leil lineup.

Is the Leil Black Cube Comfort Right for Your Space?

Best for a Modern Backyard Sauna Retreat

The Black Cube Comfort is ideal for homeowners who want a 6-person outdoor sauna with modern design, authentic traditional heat, and more interior room than a compact cube sauna.

It works especially well for:

• Backyard wellness spaces
  
• Patio sauna installations
  
• Sauna + cold plunge setups
  
• Families and couples
  
• Social sauna bathing
  
• Modern outdoor living spaces
  
• Customers who want a design-forward sauna kit
  

Before ordering, confirm:

• Final sauna location
  
• Level foundation or pad size
  
• Delivery access from curbside to build site
  
• Electrical path for heater and lighting
  
• Heater size and control placement
  
• Assembly help and timeline
  
• Clearance around the sauna for installation and service
  

For the foundation, we generally recommend a stable, level base such as compacted gravel, concrete, pavers, or a properly reinforced deck. A pad that extends several inches beyond the sauna footprint on all sides is helpful for stability, drainage, and installation access.

Leil Black Cube Comfort Outdoor Sauna Kit

Premium outdoor sauna kit designed for up to 6 bathers.

ThermoWood® Sauna Structure

Handcrafted ThermoWood® construction designed for a durable, refined outdoor sauna experience.

Black Tempered Glass Front

Large black tempered glass front for natural light, modern styling, and a more open interior feel.

Opposing Bench Layout

Spacious interior bench configuration designed for social sauna bathing and shared relaxation.

Ventilation + Sauna-Ready Interior Details

Thoughtfully designed ventilation and sauna interior components support traditional heater performance and balanced heat.

Assembly Materials + Instructions

Includes the sauna kit components and installation materials needed for assembly.

Required but Sold Separately

• Traditional sauna heater package including required stones
  
• Heater control system, if required by selected heater
  
• Heater safety rail or heater accessories, if desired
  
• Electrical installation materials

General

Model: Leil Black Cube Comfort

Capacity: Up to 6 People

Sauna Type: Outdoor Traditional Finnish Sauna

Installation: Outdoor

Assembly: DIY Modular Sauna Kit

Dimensions

Exterior Dimensions: 86.2" W × 89" D × 86.6" H

Interior Dimensions: Approximately 80.2" W × 78" D × 80.2" H

Bench Length: Two 74" Thermo-Alder Benches

Sauna Room Volume: 275.5 cu. ft.

Construction

Wall Thickness: 40mm ThermoWood®

Interior Walls & Ceiling: ThermoWood®

Bench Material: Thermo-Alder

Door & Front Wall: Bronze Tempered Glass

Roof: EPDM Weatherproof Roof System

Ventilation

• Three-point engineered airflow system
  
• Fresh air intake beneath heater
  
• Balanced exhaust ventilatAdjustable drying vent
  

Heater Compatibility

Compatible with premium electric sauna heaters and select wood-burning heaters.

Optional Upgrades

• Panoramic Rear Window

• LED Lighting
  
• Heater Safety Rail
  
• Premium Heater Packages
  

Country of Origin

Handcrafted in Estonia

The Black Cube is designed for DIY assembly and is typically completed over two days with basic tools. Panels arrive prefabricated and fit together cleanly for a straightforward build.A flat, stable surface such as concrete, pavers, or a reinforced deck is recommended. Heater installation must follow local electrical codes and should be completed by a licensed electrician.

Resources

• BLACK Cube COMFORT _Construction instructions
• BLACK CUBE COMFORT Interior Diagram (mm)
• Black Cube Comfort Exterior Diagram (mm)
• Assembly Video

For installation and Owner's Manuals on the Heaters and controls please hover over the heater of your choice and click 'View Details'

The Black Cube Comfort is delivered via scheduled premium freight service directly to your residence, project site, or installation location for a seamless delivery experience. Each sauna is carefully prepared and professionally packaged to ensure it arrives securely and in pristine condition.

Scheduled Premium Freight Service: The applicable freight charge will be added in your cart and clearly displayed at checkout before your order is completed.

When inventory is available, most orders ship within approximately 3–5 business days. Due to the limited production nature and international demand for the award-winning Black Cube Collection, select configurations and upgrades may occasionally require extended lead times.

If a unit is temporarily out of stock, upcoming production shipments may require an additional 6–8 weeks or longer, depending on manufacturing schedules and overseas transit availability.

For time-sensitive projects, custom builds, or architectural installations, we recommend contacting our team prior to purchase to confirm current inventory, production availability, and estimated delivery timelines for your preferred configuration.

Each sauna arrives as a complete premium DIY sauna kit and includes all essential structural components, roofing materials, hardware, and finishing details required for installation.

Pallet size: 3.94' × 7.38' × 3.94'

Your Leil Sauna includes the full manufacturer's warranty for added peace of mind.

Included Warranty

• Two-Year Manufacturer Warranty
  
• Covers defects in materials and manufacturing
  
• Full warranty support through NW Immersion
  

As an Authorized Leil Dealer, NW Immersion provides expert guidance before your purchase and ongoing support should warranty assistance ever be needed.