Finnleo Northstar Modular Outdoor Saunas

Transform Your Backyard Into a Finnish Wellness Sanctuary

Premium outdoor saunas handcrafted in Minnesota, delivering authentic Nordic sauna experiences with modern convenience right in your own backyard.

black painted northstar 57 with white led backrest lighting
Northstar Outdoor 5x7 Sauna by lakefront property in minnesota

About The Northstar Outdoor Sauna Series

The NorthStar Outdoor Sauna Series brings authentic Finnish sauna traditions to Minnesota backyards with three sizes to fit your space and lifestyle.

Choose from the compact 4’x6′ model for intimate sessions, the popular 5’x6′ with extra elbow room, or the spacious 5’x7′ that seats up to five people. Each model features Nordic White Spruce construction, WiFi-enabled controls you can operate from your phone, Finnish-made heaters, and everything needed for year-round outdoor use—including waterproof flooring and a metal roof kit.

Built right here in Minnesota with imported Finnish components, these freestanding saunas install in a day and deliver the deep, penetrating heat that makes authentic sauna experiences so transformative.

Key Features & Benefits

The Northstar is one of, if not the best value saunas on the market.  It’s intentionally non-customizable to keep the price down, but still offer a durable and reliable sauna that performs year-round.

unstained finnleo northstar outdoor sauna on back patio installed by sauna supply company in minnesota
finnleo northstar 5x7 outdoor sauna

Modular Panel Construction - Take your investment with you when you move

Unlike stick-built saunas that become permanent fixtures, the Northstar’s ingenious panel system assembles with basic tools and disassembles just as easily—perfect for homeowners who don’t want to leave their wellness investment behind.

finnleo northstar 46 4x6 outdoor modular panel built sauna
northstar 4x6 outdoor sauna

Year-Round Minnesota Performance - Heavy-duty construction & insulated

Built to withstand Minnesota’s temperature swings, your NorthStar sauna delivers consistent, penetrating heat whether it’s 0°F or 95°F outside, making wellness accessible 365 days a year.

Smart Sauna Technology - SaunaLogic2 WiFi control with mobile app

Start heating your sauna from the couch, office, or gym—then walk into perfectly heated bliss. Control temperature, lighting, and optional audio from anywhere, making spontaneous sauna sessions effortless.

northstar 5x7 sauna nordic spruce interior
northstar 5x7 nordic spruce interior

Therapeutic Light Therapy - Ambient LED lighting

Transform your evening sauna into a mood-enhancing light therapy session. Choose calming blues for relaxation, energizing reds for recovery, or cycle through colors to match your wellness goals.

finnleo northstar 5x6 outdoor sauna painted black

All-Season Elegance - Bronze Tinted Door & Window(s)

Bronze-tinted glass doors create stunning sightlines. Watch snow fall or summer sunsets through contemporary full-glass doors that make your sauna feel spacious inside while adding architectural beauty to your landscape.

designer sl2 heater white bg square

All-Season Elegance - Bronze Tinted Door & Window(s)

The Designer Series is a reliable, “work horse” sauna heater.  It is built to withstand heavy use and heats up quickly because of its smaller rock mass (50lbs).  

Like the rest of the Finnleo Northstar sauna, the Designer-SL2 heater comes with a five year warranty.

finnleo northstar 46 outdoor sauna

Authentic Finnish Materials - Nordic White Spruce & Abachi

Transform your evening sauna into a mood-enhancing light therapy session. Choose calming blues for relaxation, energizing reds for recovery, or cycle through colors to match your wellness goals.

stained finnleo northstar 5x7 sauna on deck

Value-driven sauna

The Northstar Sauna doesn’t come with customizations because it helps keep the price of the sauna down, while also increasing the speed at which the saunas are built.  If you’re looking for a custom sauna see our “Euro Series” for modular or our Custom Outdoor Saunas page for fully custom builds.

The Northstar is one of the best sauna options if you’re looking for a combination of superior performance and price.

finnleo northstar 5x7 outdoor sauna by the lake

Comprehensive 5 Year Warranty with our expertise & support

The Northstar Outdoor comes with a 5-year comprehensive warranty on all components including the Finnish-made Designer SL2 heater, proven SaunaLogic2 controls, and lighting. 

The Northstar is built in Minnesota and backed by our support team here in Cokato, MN—something you aren’t going to get from online dealers selling all-imported saunas.

Northstar Outdoor Sauna Models & Specs

The NorthStar Outdoor Series offers three models designed to match your space and lifestyle needs, each featuring the same premium Finnish components and meticulous Minnesota craftsmanship.

Models range from the compact NorthStar 46 (perfect for couples or solo sessions) to the social NorthStar 57 (accommodating up to 5 people).

nordic spruce interior on 5x7 northstar sauna

NSO-46 (4x6) 2-3 Person Sauna

The ideal choice for smaller spaces or for those who primarily enjoy solo sauna sessions. It’s a compact powerhouse that delivers a full-featured wellness experience without demanding a large footprint.

  • Capacity: Up to 3 people
  • Exterior Dimensions: 48″ D x 72″ W × 84″ H 
  • Exterior Dimensions (with roof): 72″ D x 88″ W x 87 7/8″ H 
  • Heater: 4.5 kW Designer-SL2 (with Wi-Fi)
  • Interior Volume: 124 cu. ft.

NSO-56 (5x6) 2-3 Person Sauna

For those with a bit more room, this model is highly recommended for its increased bench space and enhanced comfort. The slightly larger footprint provides more room to stretch out and enjoy a deep, relaxing sweat.

  • Capacity: Up to 3 people 
  • Exterior Dimensions: 60″ D x 72″ W x 84″ H 
  • Exterior Dimensions (with roof): 84″ D x 88″ W x 87 7/8″ H 
  • Heater: 6.0 kW Designer-SL2 (Wi-Fi)
  • Interior Volume: 163.7 cu. ft.

NSO-57 (5x7) 4-5 Person Sauna

The perfect sauna for community. With an L-shaped bench design and extra space, this model comfortably accommodates small groups of friends or family, making it a hub for social wellness.

  • Capacity: Up to 5 people 
  • Exterior Dimensions: 60″ D x 84″ W x 84″ H 
  • Exterior Dimensions (with roof): 84″ D x 100″ W x 87 7/8″ H 
  • Heater: 6.0 kW Designer-SL2 (Wi-Fi)
  • Interior Volume: 183.6 cu. ft.

Additional Product Details

Additional Details

Materials & Construction

  • Authentic Woods: The interior and exterior are constructed from Nordic White Spruce, the traditional wood species used in Finland’s saunas.
  • Premium Benches: Benches and backrests are crafted from clear Aspen or Abachi for a smooth, comfortable seating experience.
  • Minnesota-Made: Each sauna is expertly hand-crafted in Minnesota with imported materials, ensuring reliability and longevity.
  • Bronze Tint Door & Window(s): Single pane, tempered bronze tint glass for an elegant view and spacious feel while sitting inside the sauna.


What’s Included in Your Purchase

  • Freestanding sauna room with Nordic White Spruce construction
  • Finnish-made Designer-SL2 electric heater
  • SaunaLogic2 Wi-Fi enabled control system
  • Integral waterproof vinyl flooring
  • Durable metal roof kit
  • In-backrest LED and chromatherapy lighting
  • Optional Upgrade: SL2 Bluetooth Soundbar


Maintenance & Safety

  • Easy Upkeep: To ensure a long life and ensure the warranty is valid, the sauna’s exterior must be finished with an approved paint or stain immediately after installation.
  • Safety Certified: All models are ETL listed for safety.
  • Electrical: The sauna must be hard-wired directly to your electrical panel by a licensed electrician to meet code and ensure safe operation.

Product Images

SaunaLogic 2 Wi-Fi Control - Total Control, Anytime, Anywhere

The Finnleo Northstar Sauna comes with the SaunaLogic2 Control—a sleek, modern touchscreen that puts your sauna settings right at your fingertips. And the best part? It’s Wi-Fi enabled, so you can control your sauna from anywhere using your smartphone or tablet.  

How It Works

  • Download the SaunaLogic App on IOS or Android 
  • Start your sauna, adjust the temperature, set a timer, or turn on the lights—from your couch, car, or office
  • Enjoy delayed start options (up to 24 hours in advance)
  • Save your favorite settings for fast, one-tap access

Specs & Features

  • Water-resistant, full-glass touchscreen display
  • Mounts inside or outside the sauna
  • Slim profile: 3-3/8” wide x 5-1/2” tall x 1/4” deep
  • Optional add-ons like mood lighting and Bluetooth soundbar
  • UL/ETL certified and safe for wet environments

Why It's a Game-Changer

  • Ultimate convenience: Preheat your sauna on your way home
  • Better consistency: Save custom settings you love
  • Peace of mind: Check sauna status remotely for safety
  • Modern comfort: Control your sauna like a smart home device

Installation - Choose Your Path

We believe in giving our customers options. Whether you’re a hands-on DIYer or you’d prefer to sit back and have the experts handle everything, we have a path for you.

1. For the Confident DIYer: Guided Self-Assembly

The Finnleo Northstar is designed for straightforward assembly. If you’re comfortable with power tools and enjoy a weekend project, this is an incredibly rewarding option.

  • What to Expect: The kit comes with an instruction manual that walks you through the process step-by-step. The walls are pre-built panels that lock together, making assembly intuitive and secure.
     
     
  • Our Support Promise: Unlike other online sellers, our support doesn’t end when the truck leaves. As your local Minnesota experts, we’ve assembled these exact models countless times. If you have a question or hit a snag, we are just a phone call away. That expert backup is the Sauna Supply Co. difference.
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2. Our Signature White-Glove Installation (Minnesota & Surrounding Area)

For the ultimate peace of mind, let our in-house team of professional sauna builders handle the entire installation. This isn’t a third-party service; it’s our own expert crew ensuring your investment is assembled to perfection.

  • What’s Included:
    • Our team carefully un-crates and moves every component to your desired sauna location.
    • We perform a precise, professional assembly of the entire sauna, from the base frame to the ceiling panel and all interior components.
    • We ensure the room is perfectly level, square, and secure.
    • We clean the site meticulously upon completion, leaving you with nothing but a beautiful, ready-to-use sauna.

 

Choosing our White-Glove Installation means you can relax, knowing the job is done right, done efficiently, and backed by our company’s reputation.

Preparing For Your Northstar Outdoor Sauna

Before we arrive with your Northstar Sauna, have these basics locked in:

  1. Create a solid, level base. Choose poured concrete, patio pavers, a pressure-treated deck, or 6-8 in. of compacted Class 5 gravel. The surface must be flat and square—any tilt can twist the frame and make doors stick.

  2. Run or have a plan for 240 volt power. If you’re choosing an electric heater, schedule a licensed electrician to pull a dedicated 240-V, X-amp line (breaker size depends on heater kW).  Pulling high-voltage power can be done after the sauna is installed.

  3. Check access and clearances. We need at least 94″ of vertical clearance and a clear path from the street or driveway to the pad.

  4. Think drainage and snow load. Slope the ground around the pad ¼ in. per foot to direct water away. In heavy-snow zones, confirm your base can handle 70 psf or more.

With these four items squared away, installation is a single-day job (professionally done) and your first löyly is coming soon.

Local Support & Finnish Expertise

We’re not just a sauna dealer—we’re sauna users, builders, and enthusiasts with Finnish roots and Minnesota values.

With 45+ five-star Google reviews and a showroom where you can experience authentic Finnish sauna firsthand, we’re proud to be one of Minnesota’s most trusted sauna builders—transforming homes one beautiful sauna at a time.

image of the sauna supply company team

Your Next Step - Submit a Form

Transform your backyard into a daily wellness retreat with a NorthStar outdoor sauna perfectly sized for your space and lifestyle. 

Submit a form or call 612.505.9700 to get started. 

Common Questions

Here are some of the most common questions people ask.

The Northstar saunas are designed for straightforward assembly. They arrive in pre-built panels, and with a few people, can typically be assembled in a weekend with two adults. We recommend a 12-inch or greater clearance on all sides and overhead for installation. For those who prefer a turnkey solution, our expert team offers professional installation services for one day installs.

The Northstar Outdoor Sauna Series requires 240 volt power (electrician required).  The amperage depends on the model.  

Start by measuring your available outdoor area, keeping the recommended clearance in mind. Then, consider how you’ll use it. If it’s mainly for you and a partner, the NSO-46 or NSO-56 are excellent choices. If you envision hosting friends or have a larger family, the spacious NSO-57 is the ideal option. Our experts are always here to help you review your space and goals to find the perfect match.

It includes a strong warranty 5-year warranty from Finnleo.  Tech support is based in Cokato, MN.  

Staining or painting must be done immediately after installation for the warranty to be valid. 

Maintenance is minimal. The most important step is to immediately treat the exterior wood with a quality paint or stain to protect it from the elements. Periodically, you can clean the interior benches with a soft brush and water. It’s a durable product designed for years of enjoyment with very little upkeep.

 


We offer something online-only retailers can’t: true local expertise and peace of mind. With our Finnish heritage, we have sauna in our blood. We’ve sold and build hundreds of saunas, so we know what works. You can visit our showroom, talk to a real person, and get a partner who will support you from selection through installation and for years to come.

Still have other questions?

If you have other questions or need specific information, don’t hesitate to ask. We have years of sauna experience and will help you with what you need.

Visit Our MN Sauna Showroom

Experience the difference quality makes at our Cokato showroom, where you can see, touch, and even try our saunas before making your decision. Our showroom features models of custom indoor, custom outdoor and modular saunas, allowing you to compare construction quality, experience different wood types firsthand, and feel the authentic heat firsthand. Whether you’re drawn to the aromatic Western Red Cedar, the clean look of Canadian Hemlock, or the traditional Nordic Spruce (and more), seeing and smelling these woods in person makes all the difference.

Our sauna experts are here to answer your questions, explain the differences between modular and custom construction, and help you visualize how a sauna would fit into your lifestyle and property. Many customers tell us that visiting the showroom transformed their understanding of what they wanted—there’s simply no substitute for experiencing seeing and sitting in a sauna before you buy.

Our sauna showroom is located at 500 Cokato St W in Cokato, Minnesota.  View our current business hours on Google Business Profile here or call 612.505.9700 to schedule an appointment. 

Request A Northstar Sauna Quote

The Northstar Sauna Series is built for year round performance at a great value price.

A team member will reach out to you after you submit the form! 

Request A Quote

Our response times are quick.  A team member will reach out to you after you submit the form!