Leil® Black Cube Comfort 6-8 Person Outdoor Sauna

No. The Black Cube Comfort is sold without a heater, so you can choose the one you want from the options above: HUUM DROP, HUUM HIVE Mini, HUUM CORE, Harvia Cilindro, Mondex Teno or the HUUM FLOW Mini wood-burning stove. Every heater comes with its stones.

If you would like a ready-made electric package, the Black Cube Comfort Kit includes the HUUM CORE 11kW heater, UKU Glass WiFi control, LED strips above both backrests, a bucket and ladle and black exterior paint for £9,999.

The base price of £8,999 includes the complete sauna cabin: 40mm thermowood structure, 8mm black tempered glass front and door, black shingle roof, alder wood benches and ventilation. Heater, control panel and LED lighting are chosen separately as add-ons.

No. The Mondex Tahko has a built-in control, and the HUUM FLOW MINI is wood-burning so doesn't need one. However, the HUUM DROP and HUUM HIVE Mini both require a separate UKU control panel – you can choose from Local Control, Classic WiFi, or Glass Panel WiFi options.

The Comfort is larger (6-8 person vs 4-6 person) and fully customisable – you choose your heater, control panel, and lighting options. The Premium is a pre-configured kit with the HUUM Drop heater, UKU Glass WiFi control, and LED lighting included. The Premium also has a decorative hexagonal back wall and three-level benches, while the Comfort has two-level benches. The Comfort is made to order (3-4 week lead time), while the Premium ships from UK stock.

It depends on your priorities. Wood-burning (HUUM FLOW MINI) offers the most authentic, traditional experience with no electricity needed – ideal for off-grid locations or purists who enjoy the ritual. Electric heaters are more convenient, heat up faster, and can be controlled remotely with WiFi. If you want the best of both worlds, the HUUM HIVE Mini's massive 140kg stone capacity produces löyly closest to wood-burning while still being electric.

Flat-pack delivery to mainland England and Wales is included in the product price. The sauna arrives on a large pallet weighing approximately 750kg via tail lift truck. Our driver will move the pallet as far into your driveway as possible. If you choose fully assembled delivery (+£1,300), you'll need to arrange a forklift or crane to unload it – our team can help organise this for an additional charge.

Scottish delivery supplements and exclusions apply by postcode and are shown at checkout.

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.

All 9kW electric heaters can run on single-phase or three-phase supply. The Mondex Tahko uses a standard 16A plug. The HUUM heaters require hardwiring by a qualified electrician. You'll need approximately 40 amps on single phase with 6.0mm² cable or higher. Always have a qualified electrician review the heater manual before installation.

The HUUM FLOW MINI package includes everything you need: the stove, protective bedding, floor plate, stones, and chimney set. You don't need any electrical connection. The chimney exits through the roof and must be installed according to building regulations – we recommend having it inspected by a HETAS registered installer if you're unsure.

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.

Buy one 2.7-litre tin (2.7 litres total) of Tikkurila Supi Sauna Finish for the sauna-room walls and ceiling, and one 1-litre tin (1 litre total) of Tikkurila Supi Laudesuoja for the benches and backrests. For untreated exterior timber, buy either one 2.7-litre tin and two 0.9-litre tins (4.5 litres total) of Tikkurila Valtti Plus Kesto or three 0.75-litre tins (2.25 litres total) of Osmo UV Protection Oil Extra for the specified two-coat systems.

The exterior quantities above are for an untreated flat-pack cabin. Leil states that factory-assembled cabins receive a first protective coating during production; if yours is factory-coated, confirm the supplied finish and use the same compatible system for its follow-up coat.

The buying calculation uses 16.58 m² interior requiring 2.38 litres, and 6.46 m² of bench timber requiring 0.93 litres, with 13.91 m² outside requiring 4 litres of Valtti or 1.78 litres of Osmo. It uses the lower published coverage rate and one coat inside, two coats on untreated exterior timber, with a 15% allowance. Glass, roof shingles or membranes, the underside and confirmed factory-painted trim are excluded.

These are conservative buying allowances. Follow the current label and technical sheet for the product you choose; if its coverage or coat count differs, use those figures instead.

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.