Leil® Black Cube Comfort 6-8 Person Outdoor Sauna Kit

The Black Cube Comfort cabin with a full black glass front and face-to-face alder benches, a HUUM CORE 11kW electric heater with 40kg of stones, a UKU Glass WiFi control panel, dimmable LED strips above both backrests with a wireless dimmer, a Heracles bucket and ladle, and Leil black paint for the exterior.

Building the same sauna on our standard Black Cube Comfort page costs £11,545: the £8,999 cabin, £1,249 for the HUUM CORE 11kW, £749 for the UKU Glass panel, £299 for the backrest LED strips and £249 for the bucket and ladle. The Comfort Kit is £9,999, so you save £1,546, and the black exterior paint is included as well.

The Comfort Kit is a pre-order. It has already been built and is on its way to our UK warehouse. As soon as it arrives we will contact you to agree a delivery date. Delivery to mainland England and Wales is included.

Yes, the Comfort comes with detailed assembly instructions. If you're handy with tools and have help, it can be done in a few days. However, most customers choose professional installation for peace of mind. Our team of 3 carpenters can build it in one day, with prices starting from £1,500 + VAT depending on your location from London.

The Comfort seats 6 adults very comfortably with plenty of space, or up to 8 at a push for social sessions. The two long face-to-face benches provide more usable seating space than the Premium's three-level arrangement, making it ideal for families or those who regularly host guests.

The base must be completely level and able to support approximately 1,150kg (750kg sauna plus users). Suitable materials include concrete, paving slabs, decking, or compacted gravel with a level surface. Avoid placing the sauna on slopes or areas prone to water pooling.

The HUUM CORE 11kW is rated at 10.5kW. On a 3-phase supply it needs a 16A fuse per phase and 5 x 2.5mm² cable. It can also run on a single-phase supply, where it draws around 46A on its own dedicated circuit.

The heater and UKU Glass control panel must be wired by a qualified electrician, who will size the cable for your cable run. Full details are in the Electrical Supply section on this page.

Outdoor saunas are not maintenance-free. As a minimum, owners should be prepared to inspect and re-treat exposed timber at least every 12 months, or sooner if the manufacturer manual and local conditions require it.

You should also expect normal upkeep such as keeping the sauna clean and ventilated between uses, and making minor door or hinge adjustments over time in line with the manual.

In coastal or sea-air environments, exposed metal parts should be checked more regularly and protected with a rust-proof treatment such as WD-40 or another suitable anti-corrosion product.

Sauna heaters also require maintenance in line with the manufacturer manual. This normally includes periodically checking, washing, and restacking the stones, and in the longer term electric heater elements may need replacing if they wear out.

We do not currently offer a formal maintenance programme.

We provide a 2-year warranty on the cabin when installed by a professional or approved installer. Self-installation carries a 1-year warranty. HUUM heaters come with their own 5-year manufacturer warranty. The wood must be treated inside and out with appropriate breathable oil after assembly to maintain warranty coverage.

We do not currently have a full showroom, but many of our existing customers are happy to show their sauna to prospective buyers.

If you would like to see one in person, please contact us and we can try to arrange a viewing with a customer in or near your area.

No. Our installation team can assemble the sauna, but the heater and any other electrical components must still be connected by a qualified electrician.

You will need a suitable electrical supply and, at minimum, an isolator switch. Full details are provided in the Electrical Supply section on the product page.

Yes. Any qualified electrician should be able to connect the sauna, provided they follow the electrical requirements listed in the Electrical Supply section of the product page.

After you place your order, we also send further information that you can pass on to your electrician.

In some cases, we may be able to share details of electricians who have connected saunas for previous customers.

Availability will depend on your location, and you are also welcome to use your own qualified electrician.

Assembly time depends on the model, access and site conditions. Many outdoor saunas can be assembled in around one day, while larger or more complex models may take longer.

Use the Request an Installation Quote button above the options and complete the form. We will confirm the expected installation time with your quote.

Yes. Our installation team uses specialist carpenters and installers who are experienced in assembling outdoor saunas, which is one of the reasons many customers prefer professional installation.

No. We do not carry out site visits.

To request an installation quote, use the Request an Installation Quote button above the options and complete the form with photos, measurements, site plans, access details and the proposed sauna location. Our installation team will use that information to assess access, base preparation and positioning, and flag any obvious issues before installation.

In outdoor saunas, it is normal for the timber structure to respond to changes in temperature, humidity, and ambient conditions over time. This can occasionally cause minor movement in the door opening, which may affect how the door closes or sits within the frame.

For this reason, sauna door hinges are designed to be adjustable. Minor door or hinge alignment adjustments over time are normal and should be carried out in line with the manual as part of routine ownership maintenance, rather than being treated as a product fault.

Yes. Outdoor saunas are not maintenance-free.

As a minimum, owners should expect to inspect and re-treat exposed timber at least every 12 months, or sooner if the manufacturer manual and local conditions require it.

You should also expect to make minor door or hinge adjustments over time in line with the manual, as timber structures naturally move slightly with changes in temperature and humidity.

In coastal or sea-air environments, exposed metal parts should be checked more regularly and protected with a rust-proof treatment such as WD-40 or another suitable anti-corrosion product.

Sauna heaters also require maintenance in line with the manufacturer manual. This normally includes periodically checking, washing, and restacking the stones, and in the longer term electric heater elements may need replacing if they wear out.

We do not currently offer a formal maintenance programme.

If your sauna has exposed or untreated exterior timber, use a breathable, UV-resistant and water-resistant exterior wood treatment. We recommend Tikkurila Valtti Plus Kesto or Tikkurila Valtti Plus Color. If you prefer a clear, natural finish, Osmo UV Protection Oil is a good option.

Apply the treatment after assembly and before regular use, then inspect the timber annually and re-treat it as required for the product and your site’s exposure.

For sauna-room walls, window frames and door frames, use Tikkurila Supi Sauna Finish or Tikkurila Supi Sauna Wax. For benches and backrests, use Tikkurila Supi Laudesuoja Bench Protection. Never use ordinary exterior paint, varnish or household wood treatments inside the heated sauna room.

If your sauna has factory-finished or specialist cladding, follow the supplied manual and do not overcoat it unless the manufacturer confirms the product is suitable.

These recommendations are general guidance. Check both the sauna manufacturer’s manual and the treatment manufacturer’s instructions, and satisfy yourself that the product is suitable for the timber and any existing finish before applying it. If you are unsure about a colour, request samples from the manufacturer or retailer and test one on a spare timber offcut or a small, inconspicuous area first.

Yes. Our traditional saunas are suitable for commercial use, and we already supply many commercial customers.

Commercial use requires a regular maintenance regime, as it would with any sauna. This includes cleaning the sauna, inspecting and maintaining the heater stones, and re-treating or painting the timber when required. The frequency will depend on usage, location and the manufacturer's maintenance instructions.