
Leil® Black Cube Classic 4 Person Outdoor Sauna Kit
We’ve taken your feedback on the previous version of the Black Cube to heart and are excited to introduce the new and improved Black Cube Classic (formerly Premium).
This enhanced model boasts a striking black full glass front and the HUUM Drop 9kW Wall Mounted Heater. It also includes the UKU WiFi Glass Control and comes with a complimentary bucket and ladle set.
Don't be deceived by its compact size or affordable price; this sauna is crafted with superior materials and can easily seat four people comfortably.
Back to Black
If you live by the motto “black goes with everything,” then the Black Cube Classic is your new best friend. Wrapped in a sleek, all-black exterior, this sauna doesn’t just sit in your garden—it makes a statement. It’s the sauna Batman would choose (if he ever took a day off). With its tempered black glass, dimmable LED mood lighting, and Huum Drop heater that heats things up as much as your style does, it’s not just a place to relax—it’s a conversation starter. Who knew sweating in style could look this good?
Build Your Sauna with Ease
As the name suggests the Black Cube comes as a kit for self assembly, hence the affordable price. But don't worry, it comes with very detailed assembly instructions (which you can find under the delivery and installation tab above) and should take no more than a few days to build if you know what you are doing.
Let Our Expert Team Handle the Assembly for You
Our expert assembly team can install the Black Cube Classic in your garden. A team of three skilled carpenters will complete the job in just one day. If you’d like a quote, please get in touch and let us know your location. Installation costs are calculated based on their travel time from London. See them in action below!
What’s Included in the Black Cube Kit:
-
Black Cube Classic Sauna with Full Glass Front (worth £7,699)
-
HUUM Drop 9kW Wall-Mounted Heater and side panel (worth £1,299)
-
UKU Glass WiFi Control Panel (worth £839)
-
Dimmable LED Lighting (worth £249)
-
Heracles Wellness Bucket and Ladle (Worth £249): Essential for the complete sauna experience, this set includes a 5 litre black aluminium bucket and ladle for creating steam.

Huum Drop 9kW Wall Mounted Heater

The HUUM Drop 9 kW heater stands out for its award-winning, space-saving wall-mounted design that frees up floor area and brings elegance to your sauna. Its compact form accommodates up to 60 kg of sauna stones, enabling soft, long-lasting steam thanks to the stones’ direct contact with the heating elements—producing a more traditional, gentle "löyly" than metal-heavy heaters. Crafted with durable stainless steel and backed by a 5-year warranty, it’s built to last. Plus, when paired with the UKU Wi‑Fi control, you can pre‑heat your sauna from your phone—perfect for planning sessions ahead.
Note: Due to the compact layout of the Black Cube, it’s not possible to install the safety rail on the HUUM Drop 9 kW heater.
UKU Glass

The HUUM UKU Black Glass Sauna Control Panel: a sleek, modern addition to your Black Cube. With its premium black glass design, this control panel effortlessly combines cutting-edge technology with minimalist aesthetics, allowing you to manage your sauna experience with ease and style. Perfect for complementing the bold design of the Black Cube sauna, it offers intuitive functionality while enhancing the overall ambiance.
Dimmable LED Lights - Create the Perfect Ambience
The LED lights include a wireless dimmer switch, allowing you to place it wherever you prefer. We recommend attaching it outside your sauna to keep it secure and easily accessible.
Compact on the Outside - Spacious on the Inside
The Black Cube Classic offers a private sanctuary that is compact enough to grace small gardens without compromising on space, comfortably hosting up to 4 individuals. With its thoughtful design, this sauna becomes not just a part of your wellness routine but an integral element of your garden's aesthetic.
The Black Cube Classic, with its luxurious two-step alder bench and expansive lying area, invites you to unwind in style. Its tempered glass doors and windows balance privacy with a sense of openness, allowing you to gaze upon your surroundings while you let the gentle heat envelop you. The serene glow of LED lighting complements the calming experience, setting the perfect mood for relaxation.

Exceptional Features of the Black Cube
- Spacious Yet Compact: At 1.6m in deep, the Black Cube is designed to maximise internal space while remaining ideal for smaller outdoor areas.
- Alder Benches and Thermowood Construction: Enjoy the robustness and beauty of natural materials known for their resilience and thermal properties.
- Innovative Design: From the square shingle roof to the full-circle arches, every aspect is crafted to offer both visual appeal and practical benefits.
- Walls & Roof: Made from 40mm thick, high-quality Thermowood for outstanding durability and insulation.
- External Door: Equipped with a tempered black glass door, ensuring safety and elegance.
- Benches and Seats: 2-level benches with 1-2 pcs of backrests designed for utmost comfort during your sauna experience.
- Floor Cover: Includes 1 pcs NeroStep plastic grid mats for a clean and safe floor area.
- Ventilation: 3-4x ventilation openings for optimal air circulation, maintaining a comfortable atmosphere inside the sauna.
Free and Fast Delivery
The Black Cube Kits are stored in our warehouse here in the UK. We have recently removed all shipping charges, so now delivery is free nationwide! Delivery times are usually 3 to 5 working days.
Specifications of the Leil® Black Cube Classic
| Specifications | Details |
|---|---|
| Capacity | 4 People |
| Outer Dimensions (W x D x H) | 2.18 x 1.66 x 2.22m |
| Inner Dimensions (W x D x H) | 2 x 1.38 x 2.1m |
| Sauna Volume | 5.71 m³ |
| Sauna Weight | 750 kg |
| Pallet Size | 1.2m H x 1.2 D x 2.12m L |
| Materials | Sauna shell - Black Thermowood Door/Front - Black Tempered Glass |
| Bench Material | Alder |
| Lighting | Dimmable LEDs |
| Special Features | Square Shingle Roof, Full Circle Arches |
| WALLS | 40mm THERMOWOOD |
| ROOF | Square shingle roof, Black |
| EXTERNAL DOOR | Tempered black glass door |
| FRONT WALL | Black 8mm tempered glass |
| BENCHES AND SEATS | 2-level benches |
| BACKRESTS | 1-2pcs backrests for sauna room |
| FLOOR COVER | 1pcs Nerostep plastic grid mats |
| ARCHES | Full circle arches for front and back wall, painted brown |
| HEAT PROTECTIVE BEDDING | Heat protective bedding for stove |
| VENTILATION OPENINGS | 3-4x ventilation openings |
| INSIDE | Natural wood |
| BASE FRAME | Painted Black - To be done during assembly |
| EXTERNAL MOLDINGS |
Painted Black - Pre-painted |
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
We’ve taken your feedback on the previous version of the Black Cube to heart and are excited to introduce the new and improved Black Cube Classic (formerly Premium).
This enhanced model boasts a striking black full glass front and the HUUM Drop 9kW Wall Mounted Heater. It also includes the UKU WiFi Glass Control and comes with a complimentary bucket and ladle set.
Don't be deceived by its compact size or affordable price; this sauna is crafted with superior materials and can easily seat four people comfortably.
Back to Black
If you live by the motto “black goes with everything,” then the Black Cube Classic is your new best friend. Wrapped in a sleek, all-black exterior, this sauna doesn’t just sit in your garden—it makes a statement. It’s the sauna Batman would choose (if he ever took a day off). With its tempered black glass, dimmable LED mood lighting, and Huum Drop heater that heats things up as much as your style does, it’s not just a place to relax—it’s a conversation starter. Who knew sweating in style could look this good?
Build Your Sauna with Ease
As the name suggests the Black Cube comes as a kit for self assembly, hence the affordable price. But don't worry, it comes with very detailed assembly instructions (which you can find under the delivery and installation tab above) and should take no more than a few days to build if you know what you are doing.
Let Our Expert Team Handle the Assembly for You
Our expert assembly team can install the Black Cube Classic in your garden. A team of three skilled carpenters will complete the job in just one day. If you’d like a quote, please get in touch and let us know your location. Installation costs are calculated based on their travel time from London. See them in action below!
What’s Included in the Black Cube Kit:
-
Black Cube Classic Sauna with Full Glass Front (worth £7,699)
-
HUUM Drop 9kW Wall-Mounted Heater and side panel (worth £1,299)
-
UKU Glass WiFi Control Panel (worth £839)
-
Dimmable LED Lighting (worth £249)
-
Heracles Wellness Bucket and Ladle (Worth £249): Essential for the complete sauna experience, this set includes a 5 litre black aluminium bucket and ladle for creating steam.

Huum Drop 9kW Wall Mounted Heater

The HUUM Drop 9 kW heater stands out for its award-winning, space-saving wall-mounted design that frees up floor area and brings elegance to your sauna. Its compact form accommodates up to 60 kg of sauna stones, enabling soft, long-lasting steam thanks to the stones’ direct contact with the heating elements—producing a more traditional, gentle "löyly" than metal-heavy heaters. Crafted with durable stainless steel and backed by a 5-year warranty, it’s built to last. Plus, when paired with the UKU Wi‑Fi control, you can pre‑heat your sauna from your phone—perfect for planning sessions ahead.
Note: Due to the compact layout of the Black Cube, it’s not possible to install the safety rail on the HUUM Drop 9 kW heater.
UKU Glass

The HUUM UKU Black Glass Sauna Control Panel: a sleek, modern addition to your Black Cube. With its premium black glass design, this control panel effortlessly combines cutting-edge technology with minimalist aesthetics, allowing you to manage your sauna experience with ease and style. Perfect for complementing the bold design of the Black Cube sauna, it offers intuitive functionality while enhancing the overall ambiance.
Dimmable LED Lights - Create the Perfect Ambience
The LED lights include a wireless dimmer switch, allowing you to place it wherever you prefer. We recommend attaching it outside your sauna to keep it secure and easily accessible.
Compact on the Outside - Spacious on the Inside
The Black Cube Classic offers a private sanctuary that is compact enough to grace small gardens without compromising on space, comfortably hosting up to 4 individuals. With its thoughtful design, this sauna becomes not just a part of your wellness routine but an integral element of your garden's aesthetic.
The Black Cube Classic, with its luxurious two-step alder bench and expansive lying area, invites you to unwind in style. Its tempered glass doors and windows balance privacy with a sense of openness, allowing you to gaze upon your surroundings while you let the gentle heat envelop you. The serene glow of LED lighting complements the calming experience, setting the perfect mood for relaxation.

Exceptional Features of the Black Cube
- Spacious Yet Compact: At 1.6m in deep, the Black Cube is designed to maximise internal space while remaining ideal for smaller outdoor areas.
- Alder Benches and Thermowood Construction: Enjoy the robustness and beauty of natural materials known for their resilience and thermal properties.
- Innovative Design: From the square shingle roof to the full-circle arches, every aspect is crafted to offer both visual appeal and practical benefits.
- Walls & Roof: Made from 40mm thick, high-quality Thermowood for outstanding durability and insulation.
- External Door: Equipped with a tempered black glass door, ensuring safety and elegance.
- Benches and Seats: 2-level benches with 1-2 pcs of backrests designed for utmost comfort during your sauna experience.
- Floor Cover: Includes 1 pcs NeroStep plastic grid mats for a clean and safe floor area.
- Ventilation: 3-4x ventilation openings for optimal air circulation, maintaining a comfortable atmosphere inside the sauna.
Free and Fast Delivery
The Black Cube Kits are stored in our warehouse here in the UK. We have recently removed all shipping charges, so now delivery is free nationwide! Delivery times are usually 3 to 5 working days.
Specifications of the Leil® Black Cube Classic
| Specifications | Details |
|---|---|
| Capacity | 4 People |
| Outer Dimensions (W x D x H) | 2.18 x 1.66 x 2.22m |
| Inner Dimensions (W x D x H) | 2 x 1.38 x 2.1m |
| Sauna Volume | 5.71 m³ |
| Sauna Weight | 750 kg |
| Pallet Size | 1.2m H x 1.2 D x 2.12m L |
| Materials | Sauna shell - Black Thermowood Door/Front - Black Tempered Glass |
| Bench Material | Alder |
| Lighting | Dimmable LEDs |
| Special Features | Square Shingle Roof, Full Circle Arches |
| WALLS | 40mm THERMOWOOD |
| ROOF | Square shingle roof, Black |
| EXTERNAL DOOR | Tempered black glass door |
| FRONT WALL | Black 8mm tempered glass |
| BENCHES AND SEATS | 2-level benches |
| BACKRESTS | 1-2pcs backrests for sauna room |
| FLOOR COVER | 1pcs Nerostep plastic grid mats |
| ARCHES | Full circle arches for front and back wall, painted brown |
| HEAT PROTECTIVE BEDDING | Heat protective bedding for stove |
| VENTILATION OPENINGS | 3-4x ventilation openings |
| INSIDE | Natural wood |
| BASE FRAME | Painted Black - To be done during assembly |
| EXTERNAL MOLDINGS |
Painted Black - Pre-painted |






















