Lumi Cube Painted Black

Cube sauna with black exterior finish

Prices from

£15,195 inc VAT
STEP 1 OF 1

Choose your sauna timber

Choose your timber colour

Natural

Walnut

Crimson

Obsidian

Mahogany

Arctic

Silver

Larch

Golden

Midnight

Olive

Cedar

Choose your roof shingles

Terracotta

Umber

Forest

Graphite

Onyx

Choose your sauna heater

Choose your add-ons

Product information

A cube that fits where a rectangle will not. Lumi Cube brings modular construction to a compact 3.33m² cube format, pre assembled Spruce sections fitting together quickly once on site. The cube shape keeps seating balanced without anyone feeling squeezed against a wall. Solid timber throughout means heat retention stays just as strong as the larger modular models. A quick route to a properly built sauna in a smaller garden. The Spruce structure is supplied with its exterior factory-finished in painted black.

Heat Treated Thermowood

Heat Treated Thermowood

Built for Every Season

Built for Every Season

Everything You Need to Install

Everything You Need to Install

Designed for Fast Heat-Up

Designed for Fast Heat-Up

Specifications

  • Shape: Square
  • Accommodates: 2-3 People
  • Footprint: 210 x 255 cm
  • Max Height: 229 cm
  • Floor Area: 3.33 m²
  • Material: Spruce
  • Main Door: 196 x 80 cm
  • Front Wall Glass: Front wall glass
  • Glazing: Tempered Glass
  • Assembly: Factory assembled
  • Insulated: Yes
  • Design Note: Only factory assembled and insulated; LED lights included as standard

Designed around your ritual

Full Moon Back Window

Full Moon Back Window

Bring the outdoors in. A full circular rear window fills the sauna with natural light and opens up wider scenic views.
Half Moon Back Window

Half Moon Back Window

Privacy meets natural light. A half-moon rear window creates a softer, brighter feel while keeping more enclosed wall space.
Full Glass Front Barrel

Full Glass Front Barrel

Turn every session outward. Full front glazing opens the barrel sauna to natural light and uninterrupted outdoor views.
Full Glass Front Cube

Full Glass Front Cube

Modern design, open views. Full-height front glazing creates a brighter, cleaner space with a sharper architectural finish.
LED Lighting Kits

LED Lighting Kits

Set the perfect mood. Integrated LED lighting creates warmth and atmosphere, transforming the sauna experience day or night
Bluetooth Speakers

Bluetooth Speakers

Soundtrack your downtime. Built-in Bluetooth speakers bring music, podcasts, and guided sessions straight into your sauna.
Quality Accessories

Quality Accessories

Complete the experience properly. Practical finishing touches that improve comfort, convenience, and the overall sauna ritual.
Premium Thermowood

Premium Thermowood

Built to age beautifully. Thermowood offers a richer finish, stronger durability, and better long-term performance.
A compact sauna that's genuinely easy to fit into a smaller garden removes one of the bigger practical barriers to regular sauna use: space. For households who'd otherwise rule out sauna ownership because a larger cabin simply wouldn't fit, a well-built compact option still delivers the same core physiological benefits as any larger sauna, heat exposure raising heart rate and improving circulation in a way that mirrors light cardiovascular exercise, with no compromise on thermal performance thanks to the insulated factory construction.

The glass front wall brings a meaningful amount of natural light into a smaller heat room, which matters more in a compact space where a fully enclosed design might otherwise feel cramped. Good natural light during sauna use has a positive effect on how relaxing the session feels, helping a smaller cabin feel genuinely pleasant to spend time in rather than purely functional.

For couples or individuals specifically, a sauna sized realistically for one or two regular users, rather than built to accommodate group sessions that rarely happen, often gets used more consistently simply because it matches actual usage patterns. Sauna bathing's wellbeing benefits, improved circulation, reduced stress, eased muscle tension, accumulate with regular use, and a compact, well-lit, genuinely inviting space that fits the available garden area is more likely to support that consistency than an oversized sauna that ends up feeling like more space than is actually needed.
Delivered as pre-assembled wall sections rather than individual panels, with free UK mainland delivery on qualifying orders. The compact cube format keeps installation quick and straightforward, manageable in a single day. Needs a solid, level base and clear access. Professional installation available as an upgrade; see our Self Assembly Guide.
The Sauna Lumi Cube needs the same straightforward care as any insulated modular sauna. After every session, leave the door open for twenty to thirty minutes to let the heat room dry out fully, which prevents mould and dark staining from building up over time. Wipe benches down once cooled, and give the interior a light sand once or twice a year wherever hands and bare skin make the most contact.

The glass front wall needs only a standard glass cleaner and a soft, lint-free cloth; given the larger glazed area on this model compared with a window alone, it's worth checking for condensation build-up after use and wiping it down before closing up. The included LED lighting needs no special maintenance beyond an occasional wipe of the fittings to keep them free of dust.

Externally, treat the spruce exterior with a wood treatment every two to three years depending on weather exposure. Given the compact footprint, this is a quicker job than treating a larger sauna, making it easy to stay on top of. Keep the base clear of leaves and standing water, and check that ground preparation is draining properly, the same principle that applies to any outdoor timber structure regardless of size.
This sauna comes with a 5 year warranty for residential use and 2 years for commercial use, covering structural timber, glazing, and hardware. Valid claims are assessed case by case, and we'll supply replacement parts wherever possible rather than the whole sauna.
Production takes 10-12 weeks, plus 1-2 weeks dispatch time for pallet haulage. This sauna is delivered as pre-assembled wall sections rather than fully flat packed. Free UK mainland shipping applies to orders over £500 covering up to one double pallet (2.4m x 1.2m x 2.2m) or two single pallets (1.2m x 1.2m x 2.2m). If your order exceeds this due to length, weight, or quantity, additional pallet charges may apply and are quoted separately based on postcode. Please have a solid base, clear access, and suitable unloading space ready before delivery, with help on site if needed. Pallet deliveries are kerbside only, and you're responsible for moving goods onto your property.
Health Benefits
Assembly & Installation
Delivered as pre-assembled wall sections rather than individual panels, with free UK mainland delivery on qualifying orders. The compact cube format keeps installation quick and straightforward, manageable in a single day. Needs a solid, level base and clear access. Professional installation available as an upgrade; see our Self Assembly Guide.
Cleaning & Care
The Sauna Lumi Cube needs the same straightforward care as any insulated modular sauna. After every session, leave the door open for twenty to thirty minutes to let the heat room dry out fully, which prevents mould and dark staining from building up over time. Wipe benches down once cooled, and give the interior a light sand once or twice a year wherever hands and bare skin make the most contact.

The glass front wall needs only a standard glass cleaner and a soft, lint-free cloth; given the larger glazed area on this model compared with a window alone, it's worth checking for condensation build-up after use and wiping it down before closing up. The included LED lighting needs no special maintenance beyond an occasional wipe of the fittings to keep them free of dust.

Externally, treat the spruce exterior with a wood treatment every two to three years depending on weather exposure. Given the compact footprint, this is a quicker job than treating a larger sauna, making it easy to stay on top of. Keep the base clear of leaves and standing water, and check that ground preparation is draining properly, the same principle that applies to any outdoor timber structure regardless of size.
Warranty
This sauna comes with a 5 year warranty for residential use and 2 years for commercial use, covering structural timber, glazing, and hardware. Valid claims are assessed case by case, and we'll supply replacement parts wherever possible rather than the whole sauna.
Delivery
Production takes 10-12 weeks, plus 1-2 weeks dispatch time for pallet haulage. This sauna is delivered as pre-assembled wall sections rather than fully flat packed. Free UK mainland shipping applies to orders over £500 covering up to one double pallet (2.4m x 1.2m x 2.2m) or two single pallets (1.2m x 1.2m x 2.2m). If your order exceeds this due to length, weight, or quantity, additional pallet charges may apply and are quoted separately based on postcode. Please have a solid base, clear access, and suitable unloading space ready before delivery, with help on site if needed. Pallet deliveries are kerbside only, and you're responsible for moving goods onto your property.

A compact, characterful modular sauna

Sauna Lumi Cube brings the modular construction approach to a compact cube format, with a 3.33 square metre footprint at 210 by 255 centimetres that suits gardens where a cube shape fits the available space better than a long rectangular cabin. Solid spruce sections are pre built before installation, giving the same faster, more predictable assembly process as the rest of the modular range, with the cube shape lending itself well to a tighter, more enclosed corner of a garden.

The cube format keeps the interior feeling balanced rather than narrow, with seating arranged to make the most of a relatively compact floor area without anyone feeling squeezed against a wall. As with the other modular saunas, the pre assembled wall sections mean the build on site is considerably more straightforward than traditional log construction, while solid spruce throughout ensures heat retention is not compromised by the modular approach in any meaningful way.

Lumi Cube suits smaller gardens that still want the cube aesthetic over a traditional rectangular cabin, offering a quick route to a properly built outdoor sauna without an extended construction project taking over a series of weekends. It is a sensible choice for anyone drawn to the cube look specifically rather than settling for it as a side effect of available space. The Spruce structure is supplied with its exterior factory-finished in painted black.
Free Mainland UK Delivery Weather Resistant Thermowood Consistent Warmth Year Warranty Year-Round Use Heats Up Fast
Free Mainland UK Delivery Weather Resistant Thermowood Consistent Warmth Year Warranty Year-Round Use Heats Up Fast
Free Mainland UK Delivery Weather Resistant Thermowood Consistent Warmth Year Warranty Year-Round Use Heats Up Fast
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A distinctive cube silhouette, built fast

A distinctive cube silhouette with the practical speed of modular construction. Factory-built and fully insulated, with LED lighting included as standard, sized compactly for two to three people in smaller gardens.

Built for gardens where space is tight

Built for gardens where space is at a premium without compromising on build quality. The Lumi Cube's glass front wall brings genuine light into a compact, insulated heat room with included LED lighting.

An accessible route into sauna ownership

An easier, more accessible route into garden sauna ownership. Modular construction means a quick, solid build, with a cube format that brings a bit more visual character than a standard rectangular cabin.

Shaped to stand out, not blend in

For smaller gardens wanting a genuine sauna without a large footprint, the Lumi Cube delivers. Fully insulated, factory-assembled, LED lit as standard, and shaped to stand out rather than blend in.

What our customers say

Don't just take our word for it

"The Cascina feels solid and well made. The aluminium frame has a clean finish, the roof panels sit neatly, and the whole structure gives the garden a much more complete look."

Aluminium Veranda | The Cascina | Modular Interlinkable | Multiple Roof & Post Styles

Olivia

The Cascina

"The Nobile has a really premium feel. The frame colour looks sharp, the materials feel durable, and the finished veranda has a clean modern appearance."

Aluminium Veranda | The Nobile | Wide Span Up To 7m | Extra-Large Gutter | Polycarbonate or Glass Roof

James

Nobile

"The Cascina suits the house perfectly. What stood out most was the sturdy frame, neat roof finish and how well the design works with the garden."

Aluminium Veranda | The Cascina | Modular Interlinkable | Multiple Roof & Post Styles

Charlotte

The Cascina

"The Fiano Glass Doors feel smooth, sturdy and well finished. They keep the space bright and open while adding extra comfort when the weather turns cooler."

Frameless Glass Sliding Doors | Fiano Glass Sliding Doors | 10mm Glass | Up To 7 Tracks | Veranda Garden Room Conversion

Henry

Fiano Glass Doors

Build your cube sauna

1

Choose the sauna size, layout and feel that suits your garden and routine.

2

Place your order and we confirm the key details before preparing your sauna.

3

Get ready for delivery, installation and proper heat sessions at home.

CREATE MY GARDEN SAUNA

Frequently Asked Questions

The cube silhouette gives a distinctive, more contemporary look in the garden while still delivering the same factory-assembled, insulated construction benefits as other modular sauna formats.

This model has a compact 210 by 255 centimetre footprint, making it one of the more space-efficient options for smaller gardens compared with larger log or multiroom alternatives.

Yes, LED lights are included as standard, fitted as part of the factory build rather than needing to be specified or added separately.

Comfortably two to three people, making it well suited to couples or individual use in a smaller garden setting.

Yes, the insulated factory-built construction performs the same way regardless of the cabin's external shape, so heat retention is just as reliable as larger modular alternatives.

5-Year Guarantee

5-Year Guarantee

Built for years of wellness and relaxation

Free UK Mainland Delivery

Free UK Mainland Delivery

Free delivery throughout England, Wales, and Scotland.

Expert Help, When You Need It

Expert Help, When You Need It

Friendly specialist support before and after your purchase. Schedule a virtual appointment.

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