Steam & Oak Cube Sauna 1.8m (Electric & Gas option)

Steam & Oak Cube Sauna 1.8m

Create your own outdoor sauna retreat with the Steam & Oak Cube Sauna 1.8m. With its clean architectural lines, full standing height and contemporary square design, this compact garden sauna offers a modern alternative to the traditional barrel shape.

Built from solid 44mm Scandinavian spruce with alder benches and an 8mm tempered-glass door, it's designed to make regular sauna sessions part of your routine without taking over your garden. Choose gas or electric heating at checkout, or select the shell-only option if you already have a suitable heater.

Choose your heater

• FinSteam Aurora 81 R11S Gas Heater – An electricity-free heating option with engineered ventilation, safety components, regulator, gas hose and sauna stones included.
• Harvia PC70 6.8kW Electric Heater – A practical electric option for regular sauna sessions, requiring a suitable dedicated electrical supply.
• Harvia PC90 9kW Electric Heater – A higher-powered electric option for faster warm-up.
• Shell Only – Choose the sauna cabin without a heater if you prefer to source your own.

Wood-fired heating is not available for this 1.8m model. The compact interior is not suitable for the wood-fired stove offered with the larger sauna models.

Why choose gas heating?

The FinSteam Aurora 81 R11S offers an alternative to conventional electric heating. Running on propane, it does not require an electrical connection to operate, making it an option to consider for gardens where installing a dedicated sauna circuit may be difficult.

Warm-up times and running costs are estimates. Actual results depend on outdoor temperature, starting temperature, session length, energy prices and the selected heater.

What's included with the gas configuration?

• Aurora 81 R11S gas heater – 8.1kW output, with flame monitoring and an oxygen-depletion safety shut-off.
• Orbis 11 stone cage – Designed to hold the sauna stones.
• Halo safety rail – A protective rail around the heater.
• Njord heat shield – Included with the heater package.
• 40kg of pre-washed sauna stones.
• UK propane regulator and 1.2m CE-marked gas hose.
• Engineered gas-ready ventilation – Wooden louvre vents built into the cabin.

The gas ventilation configuration includes a low-level fresh-air intake of at least 350cm² beside the heater and a high-level exhaust of at least 250cm² in the opposite corner. Both are designed to connect directly to the outside.

The gas-heated configuration is priced at £6,690 including VAT. The Aurora 81 R11S gas heater is also available separately.

Explore the Aurora 81 gas heater.

Gas heating costs and setup

With the Aurora 81 R11S gas heater, a typical session costs approximately £1.50–£2.00, with a warm-up time of around 15–20 minutes. Actual costs depend on propane prices, usage and operating conditions.

You'll need to source a standard UK 13kg Calor propane bottle locally. A Gas Safe registered engineer is required for a fixed gas connection. Check the heater's installation instructions and applicable safety requirements before use.

Gas vs electric: comparing the total cost

The purchase price is only part of the cost of setting up an outdoor sauna. An electric heater needs a suitable dedicated circuit, installed by a qualified electrician. Gas heating avoids the need for a dedicated electrical circuit to operate the heater, although installation costs may still apply depending on your setup.

These are indicative comparison figures. Electrical installation costs depend on your property and the work required. Any applicable gas installation costs are additional.

Running costs for each heating option

• Gas – Aurora 81 R11S: Approximately £1.50–£2.00 per session, with a typical warm-up of 15–20 minutes.
• Electric – Harvia PC70 6.8kW: Approximately £1.75–£2.25 per 90-minute session, with a typical warm-up of around 30 minutes.
• Electric – Harvia PC90 9kW: Approximately £2.00–£2.50 per session.

These estimates vary with energy prices, session length and how frequently you use the sauna.

For more detail, read our guide to sauna running costs in the UK.

Why choose a cube sauna?

The cube design offers a clean, contemporary silhouette that sits naturally alongside modern garden buildings, patios and landscaped outdoor spaces. Unlike a curved barrel, its straight walls provide full standing headroom throughout the cabin and more usable bench length within a compact footprint.

The 1.8m model is a practical choice when you want a dedicated sauna space without committing to a larger garden building. Its simple architectural form makes it a feature in its own right, while the natural timber brings warmth and texture to the setting.

Built from solid Scandinavian spruce

The cabin is constructed from solid 44mm Scandinavian spruce, kiln-dried to a stated moisture content of 14%. The thick timber walls form the main structure rather than simply covering a separate hidden frame.

Slow-grown spruce develops tight growth rings in colder climates, giving the timber a dense, substantial feel. The solid walls provide a robust structure and help create the warm, enclosed atmosphere that makes a sauna such a rewarding place to unwind.

The natural timber can also be finished with oil or colour to suit your garden. If you'd like to explore alternative timber options, read our comparison of thermowood and slow-grown spruce.

Build and finish

• Walls: 44mm Scandinavian spruce, kiln-dried to a stated moisture content of 14%.
• Benches: Alder wood, single-level seating.
• Door and windows: 8mm tempered glass.
• Roof: Bitumen shingles.
• Heater: Choose the Aurora 81 R11S gas heater, Harvia electric 6.8kW or 9kW heater, or shell-only option at checkout.

What's included?

• Sauna shell and base beams.
• Pre-cut, numbered wooden panels.
• Stainless steel tension bands.
• Alder benches with backrests.
• 8mm tempered-glass door.
• Ventilation valve and grill suited to the selected heater.
• Stainless steel floor drainage grid.
• Bitumen roof shingles.
• Fastener kit and assembly manual.
• Selected heater and sauna stones with the relevant gas or electric package.

Warranty: 24 months.

Delivery and installation

• Standard UK delivery: Free.
• Estimated transit time: 2–10 working days.
• Packaging: Three pallets, each measuring approximately 2.4 × 1.2 × 1.0m.
• Site preparation: A stable, level base should be ready before delivery.
• Assembly: Self-assembly, typically requiring two people and 4–6 hours over one or two days.

Additional requirements depend on your chosen heater:

• Electric heaters: Require a suitable dedicated supply, specified as 32A single-phase or 16A three-phase, installed by a qualified electrician.
• Gas heater: Requires a suitable propane bottle. A Gas Safe registered engineer is required for a fixed gas connection.

Specifications

• Capacity: 2–4 people.
• Suitable for: Outdoor use only.
• External dimensions (L × W × H): 1.85 × 2.0 × 2.2m.
• Sauna room depth: 1.75m.
• Anteroom: None.
• Wall thickness: 44mm Scandinavian spruce.
• Door and windows: 8mm tempered glass.
• Bench configuration: Alder, single-level seating.
• Packaged weight: Approximately 690kg.
• Warranty: 24 months.

Not sure which sauna configuration is right for your garden? Read our complete UK sauna buying guide.

Want more interior space and a covered entrance? Explore the 2.4m Cube Sauna with Porch, with capacity for 4–6 people. Prefer a more traditional curved design? Discover the 1.8m Outdoor Barrel Sauna.