Steam & Oak Gas Cube Sauna 3.4m Premium L-Bench (Electric or Wood-Fired)

NEW: First UK cube sauna available with gas heat — Steam & Oak × FinSteam

Pick "+ FinSteam Aurora 81 R14S Gas Heater" at checkout and your flagship cube ships with engineered ventilation built for gas + a bundled FinSteam Aurora 81 R14S gas heater package — ready to light on a UK propane bottle the day it lands. Steam & Oak is the only UK retailer offering this. No electrician, no chimney, no fire to tend. Hot in 15 minutes, turn a dial. The Aurora 81 is the only CE-marked electricity-free sauna gas heater on the European market (FinSteam's stated claim).

Why gas changes the equation

The real cost to your first sauna — gas vs electric

An electric sauna's shelf price isn't the price to your first löyly. A 6.8–9 kW electric heater needs its own dedicated circuit, wired by a qualified electrician and signed off under Part P — typically £800–£1,500, plus the wait to get one booked. The FinSteam gas heater connects to a UK propane bottle outside, like a patio heater: no dedicated circuit, no electrician for portable use, and it's hot on the day it arrives.

The ~£2,000 gap on the shelf narrows to roughly £500–£1,200 once the electrician is in the sum — and the gas sauna doesn't wait on a sparky's diary. (Portable use needs no Gas Safe engineer; a fixed install does. A standard UK 13 kg Calor propane bottle runs the heater for a dozen-plus sessions.)

What "gas-ready" means — engineered vents built into the cabin

The gas variant ships with wooden louvre vents at the FinSteam-specified sizes built in: intake ≥350 cm² low next to the heater (fresh air from outside), exhaust ≥250 cm² high in the opposite corner (discharged to outside). FinSteam exclude plastic disc / twist valves. Vent + heater certified together under EU Reg 2016/426. Electric/wood-fired variants ship with the appropriate vent set for that heat type.

What's in the gas variant package

• Premium cube shell + porch + anteroom + L-shape two-level alder bench + 8mm tempered glass.
• Engineered gas-ready ventilation built in.
• FinSteam Aurora 81 R14S gas heater — 8.1 kW, AENOR-tested under Reg 2016/426. ODS auto-shutoff + flame monitoring. Includes Orbis 14 stone cage + Halo safety rail + Njord heat shield as standard.
• UK propane regulator + 1.2 m CE-marked gas hose.
• 40 kg pre-washed FinSteam sauna stones.

Aurora R14S standalone retail £2,395 — gas variant bundles at £9,290 inc VAT. More on the Aurora 81.

What you'll need to source locally

• Standard UK 13 kg Calor propane bottle.
• Gas Safe registered engineer for the gas connection on a fixed install.

Steam & Oak Cube Sauna 3.4m Premium L-Bench — pick your heater at checkout

Steam & Oak — one of the very few UK sauna brands that lets you choose gas, wood-fired OR electric on the same listing. Pick at checkout.

The choice (heater options)

• ★ + FinSteam Aurora 81 R14S Gas Heater (UK first) — the new gas option. Details above.
• Shell only — buy the cabin, source your own heater.
• + Electric Harvia PC70 6.8kW — sized for the interior, single-phase ~25A circuit.
• + Electric Harvia PC90 9kW — for faster heat-up.
• + Wood-Fired Etna 12 stove + flue kit — traditional log-fired ritual.

Our flagship cube — 3.35m external + 0.4m porch + 0.75m enclosed anteroom + L-shaped two-level alder benches. The premium 6-person UK outdoor sauna with everything dialled in: standing-height cube format, proper anteroom for changing + cool-down, two-level corner bench layout, 44mm walls + 8mm glass + 24-month warranty + heater of your choice.

Running cost + warm-up

Gas (Aurora R14S): ~£1.50-£2.00 per session, 15-20 min heat-up. Electric (Harvia 6.8kW): £1.75-£2.25 per 90-min session, 30 min heat-up. Electric 9kW: £2.00-£2.50 per session. Wood (Etna 12): £2-£4 hardwood logs. See our full running-cost breakdown.

The L-shaped two-level bench is the differentiator

Two-level benches matter for shared sessions — different users have different heat tolerance, and the lower bench (cooler + closer to floor airflow) is genuinely usable for kids, older users, or anyone who finds 90°C bench-top intense. The L-shape adds corner seating that lets people face each other during conversation rather than sit shoulder-to-shoulder. Against the typical 6-person cube at this price point, this cabin ships with L-shaped two-level alder benches plus a 0.75m enclosed anteroom, where most rivals offer single-level benches and no anteroom.

Build + finish

• Walls: 44mm Scandinavian spruce, kiln-dried 14% moisture
• Benches: Alder, two-level L-shaped (lower + upper, corner config for conversational seating)
• Door + windows: 8mm tempered glass
• Roof: Bitumen shingles
• Heater: Choose FinSteam Aurora 81 R14S gas, Harvia electric 6.8/9kW, or Etna 12 wood-fired at checkout

What's included

Sauna shell, base beams, wooden panels (pre-cut + numbered), stainless steel tension bands, alder benches with backrests, 8mm tempered glass door, ventilation valve + grill (vent type matches selected heater), stainless steel floor drainage grid, bitumen roof shingles, fastener kit + assembly manual. Selected heater + stones included. 24-month warranty.

Delivery & site preparation

• Free standard UK delivery. 2–10 working days transit.
• 1 oversized pallet, 3.4 × 1.2 × 1.0 m.
• Site preparation: stable, level base before delivery.
• Electrical (Harvia variants): 32A single-phase or 16A 3-phase, qualified electrician.
• Gas (FinSteam variant): UK 13 kg Calor propane bottle local. Gas Safe registered engineer required for fixed gas connection.
• Chimney (Etna 12): clearance from buildings + overhanging trees.
• Installation: Self-assembly — 2 people, 10-16 hours over 1-2 days.

Specifications

• Capacity: 4-6 person (proper L-bench shared bathing + anteroom for full-day garden wellness use)
• Use: Outdoor only
• External dimensions (L × W × H): 3.4 m × 2.2 m × 2.2 m (incl. 0.4 m porch + 0.75 m anteroom)
• Sauna room depth: 1.75 m
• Anteroom: 0.75 m enclosed anteroom
• Wall thickness: 44mm Scandinavian spruce
• Door + window: 8mm tempered glass
• Bench config: Alder, two-level L-shaped
• Packaged weight: ~1,160 kg total
• Warranty: 24-month warranty
• Manufacturer: Czyste Pole sp. z o.o. (Polish-built Steam & Oak commission)

💡 Not sure which configuration? Read our complete UK Sauna Buying Guide.

Want similar capacity in the barrel format? See the 3m Barrel with Anteroom or 3m Canopy variant. Want the same external footprint without anteroom (lower price)? See the 2.4m Double-Shelf Cube.