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

From first idea to a sauna ready for your space.

01

Design — your way

Shape your sauna

Choose the size, wood, glass, benches and heater in the 3D builder. See the price update as you design.

Agree the details

Prefer some help? Our team can refine your design. We confirm the specification and send a clear quote.

02

Build

For custom saunas with on-site assembly

50% to confirm

Approve your quote and pay the deposit to confirm your order and start the build.

Power within 3 metres

Before delivery, have a qualified electrician prepare a suitable, energised supply within 3 metres of the agreed sauna connection point, with the specified voltage, phase and capacity.

Final 50% on delivery day

Pay the remaining half on the day of delivery, after your sauna is fully assembled and tested.

03

Delivery & install

Assembly & testing

With on-site assembly, our team builds your sauna and connects from the prepared power point inward, then tests it. Your electrician is responsible for the supply to that point.

Delivery or collection only?

If you choose delivery without assembly, or collect from our workshop, the remaining 50% is due before the sauna leaves the workshop.

Recent builds

Saunas we have designed & delivered

A mix of our previous builds

Mixed wood · Varies mm · All over

View build

Smaller sauna build

Pine · 1200x1700 mm · Koh Phangan

View build

Outdoor Teak Sauna Build – Koh Samui Hillside

Teak · 1800x1700 mm · Koh Samui

View build

Red Cedar Indoor Sauna for a 134-Year-Old Bangkok Sports Club

Red Cedar · 3600x2500 mm · Bangkok

View build

Koh Samui Indoor Teak Sauna with Ocean View

Teak · 2200x1600 mm · Koh Samui

View build

Indoor Pine Sauna with Glass Front – Bang Saen

Pine · 2200x1700 mm · Bang Saen

View build
View all projects
From the journal

Saunas, ice baths & the cold-plunge life

13 Jun 2026

Want a Chinese Sauna Imported? We Can Help

Already have a Chinese sauna in mind? Sisu Sauna can handle the entire import process for you — sourcing, shipping and customs. We'll send a full quote before you commit to anything.

Read
1 Jun 2026

Custom-Built vs Imported Sauna: Which Is Right for You?

Thinking about a sauna but unsure whether to buy custom-built or an imported flat-pack? Here's an honest side-by-side to help you decide.

Read
15 Jun 2026

The Finn Who Fled to Thailand to Build Saunas

A Finnish newspaper noticed that a Finn in Thailand is building saunas. Shocking, we know.

Read
1 Jun 2026

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.

Read
8 Jun 2026

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.

Read
17 Jul 2026

How to Use a Sauna the Finnish Way

Strip off, heat up to 80 °C, grab a vihta and plunge cold. The real Finnish sauna ritual — step by step.

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
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.

Micro-climates

One sauna, many climates — pick your heat.

Hot air rises, so the temperature climbs roughly 2–3°C for every 100 mm of height — up to 100°C at the ceiling. That layering creates natural micro-climates: sit on the upper bench for the full heat, the lower bench for a gentler session. Everyone in the same sauna picks their own.

  • Ceiling — up to 100°C
  • Upper bench — 80–90°C, the full löyly
  • Lower bench — 60–75°C, gentler heat
  • Floor — around 45°C
  • 2–3°C per 100 mm of height

Temperature layering in a Sisu sauna — the gradient every sauna bather knows.

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.

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 →
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