Sisu Sauna
Finnish soul · Hand-built in Thailand · Est. 2020

Saunas built around your space — not the other way round.

Custom outdoor and indoor saunas — Finnish in soul, with real löyly — plus ice baths, chillers and accessories. Designed, built and delivered across Thailand by the same Finnish-rooted team since 2020.

Built by Sisu sauna.in.th

Which sauna is your kind of sauna?

Take a 2-minute quiz — discover your sauna spirit, or get a real model recommendation and price.

How it works

Pick a model, tweak the details, get a price — same day.

01

Design — your way

Two easy ways to start. Open the 3D builder right in your browser — no sign-up, no software — and shape your sauna as you watch: size, benches, glass, wood and heater, with the price updating live. Prefer a hand? Send us a photo, a sketch or just your room dimensions and our team will design it for you, free. Either way we build to your wall, your power supply and your space, and send a clear quote the same day.

02

Build

Approve the quote and a 50% deposit gets your build underway. Each sauna is hand-built to order in our own workshop, the way saunas are made in Finland — teak, pine and red cedar, kiln-dried, with food-safe finishes only. We keep you posted along the way, and the balance is only due once your sauna is ready to leave us.

03

Delivery & install

Delivered and installed nationwide. Our team levels and assembles it on site, wires the heater, and runs the first heat-up with you — so you know exactly how to use it before we leave. Prefer to handle setup yourself? Delivery-only is available too.

Ready to start? Design it yourself in minutes, or let us do it for you.

Real people, real workshop

Every sauna is built by hand — by our own team.

We are a small Thai–Finnish crew building out of our own workshop in Surin, with a showroom in Bang Saen. We cut, frame, clad and finish every cabin ourselves, then deliver and install it with you on-site. No middlemen, no drop-shipping — just people who love saunas building yours.

Our install crew, lakeside in Chiang Rai
Our install crew, lakeside in Chiang Rai
Cladding an indoor sauna on-site
Cladding an indoor sauna on-site
Hand-building a barrel door in the workshop
Hand-building a barrel door in the workshop
Inside our walls

The 100 mm wall: box steel, insulation, solid wood.

Every Sisu wall is a factory-built sandwich panel. A welded 50 mm box-steel skeleton carries the structure, insulation fills every cavity, a foil vapour barrier seals the hot side, and both faces are boarded with plywood and clad in real wood. Rigid, straight and insulated — built for Thai heat and humidity.

  • Box-steel frame — 50 × 50 mm
  • Insulation core — 50 mm
  • Plywood — 13 mm, both sides
  • Foil vapour barrier — on the hot side
  • Solid-wood cladding — 12 mm, both sides
  • 100 mm total — one panel is 1000 × 2090 mm

Animated cross-section — the actual construction of every Sisu wall panel.

Design → Reality

What you design is exactly what we build.

The same 3D model you configure in the designer is the sauna we hand-build. Drag the handle to compare — or just watch it change.

Panoramic commercial sauna Panoramic commercial sauna 3D Design Built by Sisu Panoramic commercial sauna
Drag to compare
On-site assembly

Installation is assembly, not construction.

Your sauna arrives as finished panels and goes together in the same order as our real installation guide — from your level concrete pad to the first heat-up.

  • You A level concrete pad, ready before we arrive
  • You Mains power to the sauna by your licensed electrician — liability rules mean we can't connect the mains ourselves
  • Sisu Panels, roof, glass front and door — assembled by our own crew
  • Sisu Benches, heater, and the heater-to-control-box wiring
  • Sisu First heat-up together with you

Typical on-site assembly sequence of a standard sauna.

1/8 Level concrete pad — prepared by you Your side
New — Ice Shower
Coming soon

Cold plunge, straight from your shower head.

A chiller plumbs into any shower head. Switch it on, wait about 20 minutes for the water to run ice-cold, then step under a fresh, flowing stream — no ice needed. It's far faster than an ice bath: no filling a tub, and no waiting 4–5 hours for the water to get cold.

  • Connects to any shower head
  • ~20 minutes to ice-cold water
  • No tub to fill, no 4–5 hour wait
Get more info

How it works: mains water → chiller → any shower head → ice-cold.

Recent builds

Saunas we have designed & delivered

Boxing Champion bought our custom sauna in Jomtien

Teak · 2000x2000 mm · Jomtien, Chonburi

View build

Beautiful Semi Outdoor sauna in Hua Hin

Teak · 1850x2350 mm · Hua Hin

View build

Smaller sauna build

Pine · 1200x1700 mm · Koh Phangan

View build

A mix of our previous builds

Mixed wood · Varies mm · All over

View build

Site inspection in Bangkok

Pine · 2200x2200 mm · Bangkok

View build

Commercial sauna in Bangkok

Teak · 5000x2000 mm · Bangkok

View build
View all projects
From the journal

Saunas, ice baths & the cold-plunge life

Your Sauna Moves With You: The Joy of a Sectional Build

Unlike a built-in kitchen or that sofa you'll never move again, a Sisu Sauna is built in sections — so when you move house, it comes with you.

1 Jun 2026 Read

Electric vs Wood-Fired Sauna Heaters: What We Use and Why

Electric heaters are the practical choice for most Thai sauna builds — but wood-fired is available, and a gas option is on the way.

13 Jun 2026 Read

How Sisu Sauna Assembly Works: Your Interactive Guide

Every Sisu Sauna ships with an interactive assembly manual built for your exact build — not a generic guide. Here's how it works.

1 Jun 2026 Read

How Much Does a Sauna Cost to Run in Thailand?

Real electricity cost examples for 3–15 kW sauna heaters at Thai power rates — so you know exactly what to budget before you buy.

13 Jun 2026 Read

How to Use the Sisu Sauna 3D Designer

Design your custom sauna in minutes with our 3D builder — pick size, wood and heater, save your design, and we'll take it from there.

3 Jun 2026 Read

Sauna Ventilation Done Right: Floor & Door Gaps

Good sauna ventilation doesn't need wall vents or roof holes. Learn how floor gaps and a door gap move fresh air in — and CO₂ out — naturally.

8 Jun 2026 Read
View all articles
Watch

Saunas & ice baths in motion

Premium Red Cedar Sauna for a Bangkok Sports Club | Complete Installation

Premium Red Cedar Sauna for a Bangkok Sports Club | Complete Installation

Building a Luxury Barrel Sauna in Chaing Rai, Thailand | Complete Construction Timelapse

Building a Luxury Barrel Sauna in Chaing Rai, Thailand | Complete Construction Timelapse

View all videos

Want every option? Open the full 3D builder.

The complete designer covers every Fah, Narak and Barrel build — glass, heater, benches and more, with live pricing and instant quotes.

Open the full 3D builder →
Sisu Sauna Weekly

A little sauna inspiration, every week.

The most interesting stories from the sauna & cold-plunge world — a short, free weekly email. No spam, unsubscribe anytime.