Sisu Sauna
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Frequently Asked Questions

Everything customers ask before ordering a sauna or ice bath — customisation, lead times, delivery, technical specs and care. Can't find your answer? Reach out anytime.

Products & Customisation

Are your saunas custom-made or do you sell standard models?

Every sauna is custom-built — we have no fixed, off-the-shelf models. You design yours in our 3D builder, choosing the size, wood, heater, glass and layout and watching it come together in real time. The sizes in our catalogue are just popular starting points you can change completely, and we are always happy to help with the design.

Design yours in 3D →
What wood do you use?

We build in three woods: Thai domestic teak, Canadian red cedar, and Russian pine. Teak is dense and naturally weather-resistant, red cedar is light, aromatic and dimensionally stable, and pine is our most affordable option. You choose the wood in the 3D builder and the price updates as you switch.

Can I have an ice bath as well?

Yes. We build oval ice baths with teak cladding, sized from single-person plunge up to multi-person configurations. Often paired with our saunas for a full hot-cold wellness setup.

See ice baths →

Lead Time & Delivery

How long from order to delivery?

Custom saunas: 35–50 days from confirmed order and deposit received. Imported items and catalogue stock: 14–35 days. Lead time starts once the order is confirmed and payment received.

Do you ship internationally?

Yes. We ship globally via sea freight, palletised or in containers depending on size. We quote FOB or CIF and the buyer handles import duties.

Do you install the sauna or just deliver it?

Within Thailand we offer full installation. For everywhere else we deliver as a kit with an interactive installation manual generated for your exact sauna — not a generic guide — so it matches your specific room and layout. We are available for remote support throughout the build.

Technical

What electrical supply do I need?

Most saunas (3–9 kW heaters) run on a standard single-phase supply; only larger commercial heaters above 9 kW need three-phase. The exact wiring and load for your build is shown in the 3D builder as you design the sauna.

See sauna heaters →
Can the sauna go outdoors?

Yes — our outdoor saunas are built to last outdoors, with proper insulation and weatherproof exterior cladding. We normally fit BlueScope galvanized steel roofing, and on some models you can choose asphalt shingles instead.

How much space do I need around the sauna?

If the sauna is built into an existing room, you need a minimum of 25 mm clearance around it for ventilation. We provide an exact site plan with every order so the footprint and clearances are clear before you build.

What's inside the wall?

It depends on the build. Our commercial sauna uses a heavier wall — 12 mm interior cladding, 13 mm plywood, 50 mm rockwool insulation, a vapour barrier, 13 mm plywood, then 12 mm exterior cladding. The residential build is 12–16 mm exterior cladding (depending on the wood), a timber frame with 50 mm insulation, a vapour barrier, and 12–16 mm inner cladding. Both are adjusted for climate and use case.

Use & Maintenance

How do I look after the wood?

Inside, only ever clean with water — never any chemicals. The exterior just needs teak oil or similar a few times a year at most to keep the wood looking its best.

How hot does a sauna get?

A traditional Finnish sauna runs at 70–100 °C with low humidity, raised by throwing water on the stones (löyly). We also build infrared saunas, where our IR panels run at 80–90 °C.

Is it safe to use every day?

For healthy adults, yes — daily use is common in Finland. 15–20 minute sessions, hydrate, cool down between rounds. Anyone with heart conditions, pregnancy, or specific medical concerns should check with their doctor.

Orders & Payment

How do I order?

Contact us through the website with your requirements. For custom saunas we send a quote, refine the spec, and confirm on 50% deposit with 50% due before dispatch. For catalogue and imported items, full payment confirms the order.

What payment methods do you accept?

Card payments and QR code are handled securely through Stripe. We also accept bank transfer (Bangkok Bank) and international wire transfer for overseas orders.

Can I see one before I buy?

We can arrange a video walkthrough of a current build, share reference projects, or — for serious enquiries — a site visit in Surin. You can also visit our showroom in Bang Saen to see a sauna in person.

Still have questions?

We reply in English, Finnish, Swedish or Thai. Tell us about your space and we'll help you spec the right sauna.

Contact us