Steam & Oak Pärnu S Outdoor Sauna — 2 Person Thermowood with Glass Front & Decking

Most garden saunas are a timber box with a door in it. The Pärnu S is a designed object: black-framed glass across the entire front, black trim, black bench fronts, and warm thermowood everywhere the eye lands. It is the one you put where people can see it, not down the end of the garden behind the shed.

At 1.5 × 2 m it is compact — a two-person sauna with a proper two-level bench — and it comes with its own thermowood decking and ground frame, so it stands correctly on almost any level surface without you building a base for it.

Usually the quickest sauna we can get you

Most cabins in our Estonian range are made to order, and lead times run to several months when the factory is busy. The Pärnu is built on a different line and is often available in around six weeks — sometimes from stock.

If you want a sauna this season rather than next, this is the one to ask about first. Tell us when you want it and we will tell you honestly whether it is achievable.

Built like a building, not a kit

40 mm thermowood walls and roof — thicker than the 42 mm staves on our barrels once you account for the roof being insulated timber rather than shingle over board. Thermowood is timber kiln-treated at 180–220°C in a low-oxygen chamber: not a coating, but a change to the wood itself that closes the cells so it absorbs far less moisture. That is what stops outdoor timber cupping, twisting and splitting through a British winter, and it happens without chemical preservatives.

The floor and decking are 28 mm thermowood. The ground frame is pressure-treated. The trimming boards, bench fronts and backrest are painted black as standard — this is a finished product, not a shell you have to decorate.

Specification

What is in the box

Everything structural and every piece of trim. No hidden extras to buy before you can build it:

• 40 mm thermowood wall and roof panels
• Thermowood decking and 28 mm floor
• Pressure-treated ground frame (44 × 90)
• Two-level thermo-aspen benches with black-painted fronts
• Thermo-aspen backrest, painted black
• Tempered bronze glass door and window
• Black trimming boards throughout
• Self-adhesive roofing felt and black metal flashing
• Screws and fixings
• Assembly instructions

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. If your garden has no power at the far end, this is how you still get a sauna there.

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?

And then: safety pack, or without?

Every gas option includes the heater, the Orbis stone cage, and our fitting and commissioning. See the full gas heater range →

Or choose an electric heater

The Pärnu S takes a wall-mounted heater, which keeps the bench and floor space usable. Our Harvia Wall is black steel with a full 20 kg stone capacity for softer, steadier löyly, integrated controls and a 2-year warranty — and black steel is exactly right in this interior.

Not sure which? Ask us. This is a small, well-insulated room, so it does not need much — we will match it properly rather than sell you the biggest one.

All electric heaters must be installed and connected by a qualified electrician. We confirm the exact supply requirement with you before installation.

Prefer a different heater — HUUM, a WiFi-controlled model, or a wood-burning stove? Choose cabin only and talk to us; we can supply and fit most makes.

2-year warranty

The Pärnu S carries a 2-year warranty on the cabin structure, and the heaters carry their own manufacturer warranty.

Thermowood is stable and rot-resistant by nature, but like any outdoor timber it lasts longest if you treat the exterior and keep it treated. The black trim in particular repays maintenance. We will tell you exactly what to use and when.

Lead time — ask us, this one is usually quick

Unlike most of the range, the Pärnu is often available in around six weeks, and sometimes from stock. That said, lead times move with demand and specification.

Ask us and we will give you the real date for your build before you commit — we would rather tell you the honest timescale up front than quote a comfortable number and disappoint you later.

Getting it into your garden

• Base: level and well-drained. The pressure-treated ground frame is included, so a slab, paving or compacted gravel is all you need underneath. Allow 150 × 202 cm plus room to walk around it.
• Access: delivered flat-packed, so the parts go through a standard side gate. No crane, no dismantling fences.
• Assembly: typically a day for two people, or leave it to our installation team.
• Sequence: most customers build the cabin first, then have the heater and lighting connected once it is in position.

Options

• Exterior timber-protection finishes
• Sauna accessory sets