Is the Leil Black Cube Comfort a traditional Finnish sauna?

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Is the Black Cube Comfort suitable for year-round outdoor use?

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What makes the Black Cube Comfort different from the Black Cube Classic?

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Is the Black Cube Comfort difficult to assemble?

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Leil Saunas Black Cube - COMFORT 6 - Person Outdoor Sauna Kit - NW Immersion

Leil Black Cube Comfort 6 Person Outdoor Sauna Kit

$9,490.00 $13,779.00 SAVE $4,289.00

By Leil

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Authorized Dealer – Full Warranty Included

Modern Architecture. Designed to Bring People Together.

The Leil Black Cube Comfort is a luxury 6-person outdoor traditional Finnish sauna handcrafted in Estonia for homeowners who value exceptional craftsmanship, authentic wellness, and meaningful time together. Built from premium 40mm ThermoWood®, its striking cube architecture, expansive black tempered glass, and spacious two-bench layout create a sophisticated backyard centerpiece while delivering the authentic Finnish sauna experience. Designed for conversation, relaxation, and longer sauna sessions, the Black Cube Comfort combines generous interior space with thoughtfully engineered ventilation to provide balanced heat, authentic Finnish dry or steam sauna bathing (löyly), and year-round outdoor performance.

✓ Comfortably Seats Up to 6 People

✓ Authentic Finnish Dry & Steam Sauna Experience

✓ Premium 40mm ThermoWood® Construction

✓ Spacious Opposing Bench Layout for Social Sauna Bathing

✓ Handcrafted in Estonia with Timeless Nordic Design

Panoramic Rear Window Upgrade

Standard Rear Wall (included)

Interior LED Lighting

Elevate the mood and atmosphere of your sauna with integrated LED lighting concealed beneath the benches and behind the backrests. The result is a soft architectural glow that enhances the natural beauty of the wood interior while creating a more immersive wellness experience.

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Sauna Heater Packages *

Hand-selected heater packages designed specifically for the Black Cube Comfort, delivering exceptional performance, efficiency, and the authentic Nordic sauna experience Leil saunas are known for.

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Complete Your Sauna Experience

Thoughtfully selected essentials designed to enhance comfort, preserve your investment, and help you enjoy the authentic Finnish sauna experience for years to come.

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Complete Your Contrast Therapy Experience

Pair your sauna with a premium cold plunge to create the ultimate hot-and-cold wellness ritual.

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Enhance Your Wellness Experience

Upgrade every sauna session with advanced red & near-infrared therapy. Sauna-rated up to 215°F for safe, seamless use inside traditional saunas.

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Nationwide Scheduled Sauna Delivery — $990

Professional freight delivery with coordinated scheduling to ensure your sauna arrives safely and efficiently at your property.

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Manufacturer Warranty Included
Expert Support Before & After Delivery
Personalized Freight Delivery Coordination
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Our team helps customers nationwide with sauna selection, site preparation, delivery planning, and installation guidance.

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Product Overview

Modern Architecture. Built for Connection.

The Leil Black Cube Comfort is a luxury 6-person outdoor traditional Finnish sauna handcrafted in Estonia for homeowners who want an authentic Finnish sauna experience in a spacious, architecturally stunning design. Built from premium 40mm ThermoWood®, the Black Cube Comfort combines bold contemporary styling with exceptional craftsmanship to create a backyard wellness retreat that's equally suited for quiet relaxation and meaningful time with family and friends.

Unlike traditional outdoor sauna layouts, the Comfort features two extra-long opposing thermo-alder benches that encourage conversation while providing ample room to stretch out and fully relax. Its thoughtfully engineered three-point ventilation system delivers balanced airflow, fresh oxygen circulation, and consistent heat throughout every session, allowing you to enjoy invigorating dry sauna bathing or authentic Finnish löyly by pouring water over heated sauna stones.

From its striking black tempered glass façade to its clean Nordic architecture and premium materials, every detail has been designed to deliver an elevated sauna experience that complements modern outdoor living while providing decades of authentic Finnish wellness.

Why You'll Love it!

Authentic Finnish Dry & Steam Sauna

Enjoy traditional Finnish sauna bathing with invigorating dry heat or create authentic löyly by pouring water over heated sauna stones for a deeply restorative sauna experience.

Spacious Opposing Bench Layout

Two extra-long 74-inch thermo-alder benches create a comfortable social layout with generous room to relax, recline, and enjoy longer sauna sessions together.

Premium 40mm ThermoWood® Construction

Built from thermally modified Nordic wood for exceptional durability, dimensional stability, insulation, and year-round outdoor performance.

Modern Cube Architecture

Bold black accents, expansive tempered glass, and clean architectural lines create a stunning outdoor centerpiece that complements contemporary homes.

Handcrafted in Estonia

Expertly handcrafted using authentic Nordic craftsmanship, premium materials, and generations of Finnish sauna tradition.

Built for Every Season

Engineered ventilation, premium ThermoWood®, and exceptional construction deliver balanced heat and consistent sauna performance throughout the year.

What’s Included

Premium 40mm ThermoWood® wall, ceiling, and floor system
Two 74" thermo-alder benches and matching backrests
Tempered black glass front wall and door
Premium black hardware
Black shingle weatherproof roof system
Three-point engineered ventilation
Complete modular sauna kit
Premium assembly hardware
Detailed installation instructions
Full manufacturer's warranty

Please Note: Heater, sauna stones, controls, LED lighting, decorative Hexagon DECO wall panel, heater safety rail, and accessories are selected separately to customize your sauna.

Specifications

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

Resources & Guides

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

Shipping & Delivery

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.

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'

Warranty

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.

Frequently Asked Questions

Yes. The Black Cube Comfort is a traditional Finnish sauna designed for authentic dry sauna bathing and traditional löyly by pouring water over heated sauna stones, allowing you to enjoy the true Finnish sauna experience at home.

Absolutely. Like traditional Finnish saunas, simply pour water over the heated sauna stones to create gentle steam (löyly) while maintaining authentic Finnish sauna temperatures.

Yes. The premium 40mm ThermoWood® construction, black shingle roof system, and exceptional Nordic craftsmanship are engineered for outstanding year-round outdoor performance.

ThermoWood® is thermally modified through a process of heat and steam, never any chemicals, to improve weather resistance, durability, dimensional stability, and insulation while reducing moisture absorption—making it one of the finest materials available for premium outdoor saunas.

The Black Cube Comfort offers a significantly larger interior with two opposing 74-inch benches, creating a more spacious, social environment ideal for family gatherings, entertaining, and longer sauna sessions while maintaining the same modern architectural design.

No. We intentionally allow you to choose the premium heater package that best fits your preferred sauna experience, electrical setup, and personal preferences.

Yes. You can choose your preferred heater package, LED lighting, panoramic rear window, heater safety rail, and additional sauna accessories to personalize your outdoor wellness retreat.

A level, stable, load-bearing foundation such as compacted gravel, concrete, pavers, or a properly constructed deck is recommended to ensure proper installation, structural stability, and long-term performance.

The Black Cube Comfort uses precision-engineered modular components designed for efficient assembly. Most homeowners can complete installation in approximately one day with two people and standard tools, although assembly time varies based on experience.

If you'd prefer professional assembly, we're happy to provide contact information for independent sauna assemblers in many areas. To keep costs as low as possible, you work directly with the assembler and pay them directly—there's no middleman, markup, or additional fees from NW Immersion.

As an Authorized Leil Dealer, NW Immersion offers more than competitive pricing. Our team provides expert sauna guidance, personalized heater recommendations, installation planning, delivery coordination, and long-term customer support before and after your purchase. Whether you're selecting your first sauna or creating a complete home wellness retreat, we're here to help every step of the way.8

Leil Black Cube Comfort 6 Person Outdoor Sauna Kit

Checkout as guest

Select Gale at Checkout

Pay with HSA/FSA or credit card

Authorized Dealer – Full Warranty Included

Modern Architecture. Designed to Bring People Together.

Maximize your savings. Pay with HSA or FSA.

Purchase with Confidence

Have questions?

Modern Architecture. Built for Connection.

Authentic Finnish Dry & Steam Sauna

Spacious Opposing Bench Layout

Premium 40mm ThermoWood® Construction

Modern Cube Architecture

Handcrafted in Estonia

Built for Every Season

General

Dimensions

Construction

Ventilation

Heater Compatibility

Optional Upgrades

Country of Origin

Resources

Included Warranty

Frequently Asked Questions

Is the Leil Black Cube Comfort a traditional Finnish sauna?

Can I create steam inside the sauna?

Is the Black Cube Comfort suitable for year-round outdoor use?

What makes ThermoWood® better than standard wood?

What makes the Black Cube Comfort different from the Black Cube Classic?

Does the sauna include a heater?

Can I customize the Black Cube Comfort?

What type of foundation is required?

Is the Black Cube Comfort difficult to assemble?

Why purchase your Leil sauna from NW Immersion?

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