Minnesota Custom Indoor Modular Sauna Dealer

Sisu Modular Saunas

Meet The Sisu Modular Traditional Sauna.

Custom Modular indoor Saunas.

The Sisu is our luxury line of customizable indoor traditional sauna rooms. They are panel-built, free-standing rooms that are customizable to fit your vision.  

Customize your wood type on both the interior and exterior, bench layout, heater, add a changing room, and much more. 

When going the modular sauna route, you get the option of being able to take your sauna down and take it with you.  They’re also quicker to install than a permanent indoor sauna.   

Custom Options in the Sisu Sauna

your sauna. your way.

The indoor Sisu sauna customization process is simple.  All of our custom options are laid out below.  

Our saunas are built using the highest quality materials, for form and function. From Clear Western Red Cedar, Nordic Spruce, or Clear Canadien Hemlock, your sauna space will hold up to even the most hard-core of sauna use for decades to come. 

Step 1:

Size & Layout

There are nearly endless size and layout options for a custom Sisu traditional sauna.

There are several factors to consider when deciding on sauna room size and layout. If you have no idea where to begin, please call us! (remember, we do this for a living)

You can start by browsing through several “standard” CAD layouts shown here, and adjust however fits your space.  

Himalaya Rock Tower
The softest sauna experience on the market.
Designer Series
The sturdy, reliable, "workhorse" sauna heater. Comes with SaunaLogic 2.0 Control or Knob Controls.
Previous slide
Next slide
Step 2:

Heater & Control

The sauna heater is the heartbeat of the sauna.

After you have decided on the size and layout of the sauna, we find the appropriately sized heater for it.  Each heater will offer a different experience.  Our residential Finnleo heaters comes with a five-year warranty and we stock all of the most common heater parts you could need. Our American tech support team supports customers across North America every week of the year Monday through Friday. 

The Himalaya Rock Tower is a premier heater.  Because of its rock mass and Biowater Technique Tank, it creates a soft heat for a better sauna experience.  

The Designer Series is a reliable, sturdy sauna heater.  It is built to withstand heavy use and heats up quickly because of its smaller rock mass.

Step 3:

Wood type

Each wood type offers a different feel.

All our wood is mill-direct, using only the highest quality, hand-selected wood. All from verified sustainable forests. All wood choices are chosen for their ability to hold up for years (typically decades) in the harsh sauna environment. 

All wood that touches skin (benches, backrests, duckboard flooring, heater guard, headrest) is chosen for staying cool to the touch of the skin (no knots – they get hot in the sauna heat!)

Clear Vertical Grain Western Red Cedar, Kiln dried to 12% or less. 1″x4″ (nominal) V-Joint. 

Clear Vertical Grain Canadian Hemlock, Kiln dried to 12% or less. 1″x4″ (nominal) V-Joint. 

Black Taika is certified birch plywood developed exclusively for high performance in the harsh sauna environment. Panels are Tongued and Grooved. Each panel is 7″ width.

European Grade A Nordic Spruce, Kiln dried to 12% or less. 1″x4″ (nominal) V-Joint. Responsibly-sourced from northern Finnish forests. 

Step 4:

Interior Design

Customizing the interior design refers to the backrest, bullnose trim, and bench skirts.

There are four different “styles” of benching & backrest interior design.  Each look is available for your sauna.  

Standard

Standard interior can be done in all wood types. 

Deco

Deco interior is built with Hemlock and Heat-Treated Alder wood benching. Best paired with Cedar or Hemlock T&G.

Centurion

Centurion interior is built in wide board Hemlock wood. Best paired with Taika T&G.

Twilight

Twilight interior is built with a Abachi & Heat-Treated Alder.  Best paired with Hemlock or Cedar T&G.

Step 5:

Backrest

All custom Sisu saunas come with a standard 2-Bar backrest.

A backrest in the sauna is comfortable, looks nice, and keeps your skin off the T&G walls.  There are several upgraded backrest options to put in your custom sauna. 

Custom Nordic Spruce Interior with 2-Bar Backrest

Standard 2-Bar

Available in all wood types

3-Bar

Available in all wood types

3-Bar Wide

Available in Hemlock

5-Bar Heat-Treated

Available in Abachi & heat-treated Alder

3-Bar Wide Heat-Treated

Available in Hemlock and heat-treated Alder

2-Bar Wide

Available in Hemlock

6-Bar Curved Heat-Treated

Available in all wood types and heat-treated Alder.

6-Bar Curved

Available in all wood types

Nordic Spruce Sauna w/ Satin Finish Glass Door
Step 6:

Sauna Door

Choose between a variety of different doors. 

Each sauna door swings out.  The glass doors feature a single pane, tempered glass with a latch.  Wood doors feature a single clear, tempered pane down the center, with ball & catch latch or self-closing hinges. 

Below are standard sauna door options.

Wood Door

Douglas Fir Wood Frame, clear insulated glass insert. Ball & Catch latch standard, self closing hinges available.  Suggested rough opening on wood doors is 2″ taller and 2″ wider than the door.

  • 24″ x 72″
  • 24″ x 80″
  • 30″ x 80″
  • 36″ x 80″

All Glass Door

All Glass, available in clear, bronze and satin (frosted) tint.  Suggested rough opening on glass doors is 3.5″ wider and 2″ taller than the door.

  • 24″ x 72″ 
  • 24″ x 80″
  • 30″ x 80″
  • 36″ x 80″ 
Step 7:

Sauna Windows

Windows are optional in your sauna.

Our standard sauna window comes in a single pane, tempered glass.  They’re available in both clear and bronze tint.  

Below are our standard sauna window sizes in the Sisu series.

Standard Window Sizes: 

  • 12″ x 30″
  • 16″ x 30″ 
  • 12″ x 60″ 
  • 16″ x 60″
Clear Western Red Cedar w/ Backrest Lighting
Step 8:

Lighting

Sauna lighting is critical for the ambiance of the sauna. 

There are multiple different options for sauna lighting.  The most common is the RGBW Strip Lighting, but it’s not the only option.  

The RGBW LED strip lighting and the RGBW LED puck lights are compatible with the SaunaLogic 2.0 Control.  Change the light color and brightness to suit your liking.  The lights can be purchased and set up a la carte too.  

RGBW LED Strip Lighting

LED strip lighting comes pre-installed behind your backrest. Can also be placed under bench. 

  • Pairs with the SL2 control and app
  • Cycle through multiple colors, or white
  • Dimmable

RGBW Puck Lighting

Puck Lights go into the ceiling.

  • Pairs with the SL2 control and app
  • Cycle through multiple colors, or white
  • Dimmable
Step 9:

Duckboard Walkway

Duckboards add a nice touch to the sauna, and are comfortable to walk on.

A duckboard walkway comes standard in our Sisu saunas.  A duckboard is nice to walk on and looks good in the sauna, but they’re optional.

An additional duckboard can be purchased for outside of the sauna (entryway, etc).  

Nordic Spruce Sauna w/ Duckboard
Twilight Interior w/ Benchskirts
Step 10:

Bench skirts & bullnose Trim

Bench Skirts & Bullnose Bench Trim are popular upgrades for their elegant look. They are optional in your sauna.

Bench skirts are commonplace in a sauna for the look and feel they offer.  

Step 11:

Delivery & Installation

Our team of custom sauna installers put a high level of attention-to-detail into every sauna.

A sauna is one of the more relaxing, rejuvenating experiences that exists. Installing it in your home should be no different.

Your entire experience in working with our team at Sauna Supply Company is customized. Whether you’d like us to install your sauna for you, or DIY the entire thing yourself, you come first here. Our team will ensure that from the second we walk in your door to long after we leave that you are taken care of every step of the way.

custom cedar sauna with backrest and valence strip lighting
Custom Clear Western Red Cedar Sauna w/ dual strip lighting

Sisu Sauna Models

a wide variety of sizes.

The Finnleo Sisu sauna can be customized in nearly every way.  It comes in sizes 4’x5′, 4’x6′, 5’x5′, 5’x6′, 5’x7′, 5’x8′, 5’x9′, 6’x6′, 6’x7′, 6’x8′, 7’x7′, and 7’x8′. 

Sisu Sauna Gallery

View images of the Finnleo Sisu sauna below. 

View images of our custom sauna gallery here. 

Sisu Quote Request Form

The Sisu Sauna Series is a custom modular (panel-built) sauna series.  Design your dream sauna with different wood types, heaters, and more.  Built right here in Cokato, Minnesota.

We stand behind our product, our service, and do everything we can to make your experience working with us unforgettable. Our response times are quick! A team member will reach out to you after you submit the form! 

custom cedar sauna
custom cedar sauna interior
custom finnleo euro sauna interior with cedar
Finnleo Euro custom tradtional sauna under a deck
custom cedar 5x6 finnleo euro outdoor traditional sauna
custom cedar sauna with backrest and valence strip lighting
cedar sauna interior
finnleo custom sauna with clear canadian hemlock
custom finnleo hemlock sauna with valence lighting and six bar curved backrest
finnleo hemlock sauna
custom hemlock sauna interior with finnleo himalaya rock tower
finnleo euro hemlock sauna with rock wall
large custom hemlock sauna with two glass windows on front
hemlock sauna with bench skirts
custom hemlock sauna with heat treated bullnose trim on benches
black taika/ alder custom wood-fired sauna
black taika sauna interior with iki wood fired stove
finnleo black taika sauna
custom finnleo black taika sauna with hemlock benching and bench skirts
a custom black taika sauna with all glass front
custom finnleo black taika with hemlock benching and backrest sauna
custom nordic spruce sauna with LED strip lighting and bench skirts
custom nordic spruce sauna with abachi backrest
finnleo custom sisu traditional indoor sauna with nordic spruce wood exterior
nordic spruce sauna interior with finnleo himalaya rock tower heater
nordic spruce changing room

Let's Build Your Dream Sauna!

Our entire team has been taking Sauna for most of our lives. Growing up in Finnish families, it’s what we did. 

We have years of sauna building experience on our team.

We stand behind our product, our service, and do everything we can to make your experience working with us unforgettable. Our response times are quick! A team member will reach out after you submit the form! 

nordic spruce sauna with 2-bar abachi backrest
cedar sauna with 2bar backrests
custom finnleo euro sauna with 2bar backrest
custom finnleo cedar sauna with 2 bar backrest and valence lighting
custom cedar sauna with 3 bar backrest
custom cedar sauna with 3 bar backrest
clear hemlock sauna with window and 3 bar wide backrest
cedar 3 bar wide backrest
custom cedar traditional sauna interior
clear canadian hemlock sauna with 3 bar wide backrest
finnleo 5-bar heat treated backrest
our showroom sauna left bench
3 bar wide heat treated backrest
custom finnleo cedar sauna w/ all glass front and 3 bar wide heat treated backrest
finnleo euro hemlock sauna interior
right wall on cedar sauna
clear canadian hemlock sauna interior with deco interior
finnleo black taika sauna
custom black taika sauna
custom finnleo euro sauna interior with cedar
finnleo 6 bar curved backrest in cedar sauna
custom cedar sauna with himalaya heater
finnleo euro cedar sauna with 6 bar curved backrest
finnleo 6 bar curved sauna backrest
curved sauna backrest with LED strip lighting
finnleo hemlock outdoor sauna with 6 bar curved backrest
custom cedar sauna with 6 bar curved backrest
custom cedar sauna with all glass front
custom cedar sauna with 3 bar backrest

Douglas Fir

douglas fir wood frame door on euro 5x6 euro sauna

Bronze Tint

finnleo all glass bronze tint door

Satin

finnleo satin glass door

Clear

Finnleo clear glass door
large custom hemlock sauna with two glass windows on front
hemlock sauna with bench skirts
custom finnleo black taika sauna with hemlock benching and bench skirts
custom cedar sauna remodel with bench skirts