Steam & Oak
Steam & Oak Eero 367 Sauna Cabin — 4–6 Person 70 mm Log with Changing Room
Steam & Oak Eero 367 Sauna Cabin — 4–6 Person 70 mm Log with Changing Room
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The Eero 367 is the deeper of our two-room cabins — 3.67 m long and built throughout in solid 70 mm log, with a changing room, a sauna room and an insulated sauna roof.
Pitched or flat roof, your choice above.
Solid 70 mm log, and it matters here
Most garden saunas are 42 mm panel. This is 70 mm solid log — the thickest wall we sell — and the difference is thermal mass. The walls store heat rather than merely containing it, so the temperature holds steady instead of dropping every time the heater cycles or the door opens.
Combined with the insulated roof element over the sauna section (12 mm boards, 50 mm ISOVER, 12 mm boards), this is the best-insulated cabin in the range. Heat rises, and an uninsulated roof is where it goes — most cabins at this size have boards and nothing more.
Two rooms
An outer door into the changing room, then a bronze glass door into the sauna. The changing side stays cool, so the hot room stays hot when four to six people are using it in rounds. Two 60 × 60 cm double-glazed windows.
Specification
| Capacity | 4–6 people |
| External size | 2240 × 3670 mm (8.22 m²) |
| Layout | Changing room and sauna room |
| Heated volume | approx. 10.1 m³ |
| Walls | 70 mm solid log |
| Wall height | 2210 mm pitched / 2400 mm flat |
| Ridge height | 2530 mm pitched / 2600 mm flat |
| Roof boards | 19 mm, with an insulated element over the sauna |
| Floor | 26 mm boards |
| Outer door | 800 × 2010 mm |
| Sauna door | 700 × 1900 mm bronze glass |
| Windows | 2 × 600 × 600 mm, double glazed |
| Roof covering | Not included — ask us and we will quote shingles |
What's in the box
Everything structural, including the parts most suppliers charge extra for:
- Pre-cut, numbered log walls
- Sauna benches
- Outer door and bronze glass sauna door
- Double-glazed windows
- Insulated roof element over the sauna section
- 26 mm floor boards and 19 mm roof boards
- Foundation beams
- Complete fixing kit
- Ventilation grids
- Step-by-step assembly instructions
One thing that is not included: the roof covering. The manufacturer supplies the roof boards and the insulated sauna element, but shingles or felt are a separate item. Tell us when you order and we will quote it with the build rather than leave you to find it.
Run it on gas — no electrician, no cable across the garden
This is the option almost nobody else offers, and for a lot of gardens it is the one that makes a sauna possible at all.
A FinSteam gas heater runs on a standard propane bottle — the same sort you would use for a patio heater or a barbecue. No armoured cable, no trench across the lawn, no electrician quote you had not budgeted for.
At around 10.1 m³ the 8.1 kW gas heater is a comfortable fit — and the 70 mm walls plus the insulated roof mean it holds what it makes.
Pick a gas option above and we fit the flue and commission the heater on installation day. You do not need to arrange anything with anyone.
Which gas option?
| Botnia 81 | Our standard 8.1 kW gas heater. Everything you need to run the sauna. |
| Aurora 81 | The premium version of the same 8.1 kW heater — better finish and detailing. |
And then: safety pack, or without?
|
With safety pack recommended if children or guests use it |
Adds the Njord heat shield and the Halo guard rail. The heat shield cuts the required clearance to combustible timber from 200 mm to 50 mm. The guard rail stops anyone brushing against the hot stones. |
| Without safety pack | Heater and stone cage only. Suits an install where clearance is generous and the sauna is for your own use. |
Every gas option includes the heater, the Orbis stone cage, and our fitting and commissioning. See the full gas heater range →
Or choose electric or wood-fired above
Electric — a Harvia heater with a full stone load for soft, steady löyly, integrated controls and a 2-year warranty. At 10.1 m³ take the 8 kW. Needs a dedicated circuit installed by a qualified electrician; budget £400–£1,200 for a garden supply on top of the heater.
Wood-fired — a Harvia M-series stove. No electrics at all, a real fire, and the traditional way to run a cabin like this. We fit the flue on installation day. If you are in a smoke control area, check the model against DEFRA's exempt appliance register first — see our smoke control area guide.
2-year warranty
Two years on the structure and on the heater, whichever heat source you choose. Covers manufacturing defects and workmanship.
Where to put it
Orientation. Point the glazing at what you want to look at, and away from a neighbour's windows. West-facing catches the evening, which is when a sauna actually gets used.
Clearance. Leave at least 300 mm behind and to the sides for air to circulate and for maintenance access. Timber boxed tight against a fence stays damp.
Planning permission. Most garden saunas fall under permitted development, but there are limits on size, height and proximity to boundaries. Our planning permission guide covers it.
Which heat source?
| Electric | Set-and-forget, thermostat controlled, no fire to tend. Needs a dedicated circuit and an electrician — usually the largest hidden cost on a garden sauna. |
| Wood-fired | The traditional method and the best heat, but you tend a fire, clear ash and sweep the flue. Restricted in smoke control areas unless the stove is DEFRA-exempt. |
| Gas (propane) | No cable, no trench, no electrician. Runs off a standard bottle, comes up in under 20 minutes, and works in a power cut. Unrestricted by smoke control rules. |
Our honest steer: if you already have power at the far end of the garden, electric is the least fuss. If you do not, gas usually costs less than running a new supply and gets you there faster. Wood-fired is for people who want the ritual and have somewhere for the smoke to go. Our full comparison goes through the running costs.
Pitched or flat roof?
It is mostly a look, but there are two practical differences. A pitched roof sheds rain and snow faster and gives more headroom at the ridge. A flat roof — actually a shallow 3° fall, not truly flat — sits lower, which matters if you are near a boundary where height is capped, and reads as more contemporary against a modern house.
Both carry the same insulated element over the sauna section, so there is no difference in how well the room holds heat.
Lead time — please ask before you order
Lead times vary with stock and specification — anything from 2 to 12 weeks. Ask us before you commit and we will give you the real date for the exact build you want, not an optimistic one.
Getting it into your garden
At roughly 1500 kg of solid log this is a substantial delivery. The pallets need a driveway or hard standing, and we would recommend a concrete slab rather than paving on gravel for the base.
It needs a level, load-bearing, well-draining base — paving slabs on a compacted sub-base or a concrete pad. Our construction service starts at £500, and we apply insulating paste between every panel as we build, which is the single biggest factor in whether a sauna holds its heat properly. Full installation guide.
Options
Choose your roof style and heater above. Roof covering is not included by the manufacturer — tell us and we will quote shingles with the order. Ask us anything before you commit.
Images are manufacturer renders. The heater shown is illustrative — your heater choice is made above.
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