Thermowood Garden Sauna - 8 Person

$ 7,999

Availability: 8 to 10 Weeks Lead Time

Our most stylish sauna yet! Cycle between high and low heat with the two-level benches to enjoy a traditional Finnish sauna experience. Relaxation is waiting for you, get your garden sauna today. Read more...

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Sweat it Out

A sauna is an investment in your mental and physical health, let your sweat carry your stress away. You won't believe how problems just roll off your back

Outdoor Entertaining

Create a unique outdoor environment for socializing , winter or summer your backyard will be the invitation your friends are all dying to receive

Commitment to Quality

Built from top quality lumber and designed with care, we are proud of every sauna we deliver

Customer Reviews & Photos


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Product Details

Have questions about our Garden Sauna? Call us now on 1800 567 8036.

Traditional Scandinavian Design

The Garden Sauna has a classic beauty in its elegant simplicity. Our Garden Saunas are constructed with interlocking Scandinavian Thermowood staves. This interlocking system allows the wood to expand and contract naturally, and form a tight seal. Not only is our Garden Sauna lovely to look at, its design holds in heat and can be assembled without complex woodworking.

Thermowood Construction

Thermowood is created by heat treating Scandinavian softwood to temperatures ranging from 180 – 230° in special chamber kilns for up to 96 hours. Steam is used as a protective gas and helps to prevent the wood from splitting and becoming damaged during treatment.

Learn more about thermowood in our FAQ section!

Thermowood's Characteristics & Qualities

This process causes chemical and structural changes to occur within the timber, which therefore alters some of its characteristics and qualities. Some of the characteristics and qualities that make Thermowood such a popular specie includes:

Dimensionally Stable – The intensive heat the wood is exposed to during its production dries out deep into the core, causing all moisture and resin to be removed from the timber. Thermowood therefore doesn’t react to changes in humidity as drastically as untreated wood (the risk of swelling, cracking and shrinkage is decreased), allowing it to retain its shape far better. The wood also doesn’t secrete sap or resin even in high temperatures.

Environemntally Friendly – The softwood used to produce Thermowood originates from well-managed, PEFC-certified forests, and as no chemicals or foreign substances are involved during its production, Thermowood is an environmentally friendly material produced by using only natural methods.

Resistance to Rot and Fungi – Due to the heating process breaking down hemicellulose, the wood doesn’t contain the appropriate nutrients to allow rot and fungi to grow and develop.

Increased Longevity – When wood is treated with heat, its average life span is prolonged meaning your sauna will last a lifetime!

Improved Insulation – Wood that has been heat treated is much more porous than untreated wood, vastly improving its insulating properties.

Harvia Sauna Heater, Made In Finland

Harvia is the world’s leading sauna heater manufacturer and Harvia heaters are considered the industry gold-standard. Harvia is was established in Finland in 1950 and has built an international reputation for exceptional quality. With a Harvia heater, you know you are getting a reliable product that you and your family can trust. All our Harvia sauna heaters are ETL certified and are manufactured in Finland. Our heaters are made from stainless steel and coated with a red enamel on the exterior. 

Manual Control or Wi-Fi Control Heater Options

Our manual control heaters have two dials: a temperature dial and a timer. The timer can be set for up to an 8-hour delay, meaning you set your heater to come on while you are out and your sauna will be ready when you get home.

Our digital Wi-Fi heaters can be controlled via the digital wall pad mounted nearby your sauna, or from any smartphone or tablet. The big convenience of the Wi-Fi control is the remote start capability which allows you to pre-heat your sauna from anywhere—whether at the office or on the slopes. With few taps on your phone, your sauna will be ready when you get home. Wi-Fi heaters can also be pre-set to come on at a specific time of day, such as early in the morning. 

Unfortunately, you cannot upgrade a manual control heater to a digital Wi-Fi system in the future. While the manual and digital heaters look very similar, they are in fact totally different heaters. This means you must select the control system you are going with at the outset.

On-Site Assembly Process

All our sauna kits are designed with the DIY customer in mind. Most cedar barrel saunas can be assembled by two people with basic handyperson skills in 3-4 hours. Our garden sauna has a more complex assembly process due to the glass front window and stadium steading. This sauna can certainly be assembled by a non-professional, however, the level of DIY skill required is higher and the woodworking involved is more complex. As a result, the build time for garden sauna is longer. If you are less confident in your DIY skills, we recommend working with a friend or relative with more DIY project experience.

* Specifications are approximate and subject to change without notice, actual product dimensions may vary

Product Diagram


Seating Capacity
6 - 8 people depending on the seating arrangement as well as the size and proximity of the bathers
Wood Type
Scandanavian Thermowood
Exterior Dimensions
Roof: 105 ½” L x 90 ½” W x 99 ¼” H // Base: 102 ¾” L x 89” W
1,500 lbs
Accessories Included
Bucket and ladle, sauna rocks, and light fixture
Wooden door with glass window included
Not included
Number of Cradles
Electrical Requirements
110V for lighting and 240V for heater
Light Fixture Dimensions
9" L x 9 ¼ W x 7" H

Packaging & Shipping Information

Shipping Format
Wooden crate
Shipping Dimensions
94” L x 43 ½” W x 37 ½” H
Our wooden saunas come with a 1-year limited warranty. For Harvia sauna heaters, Redwood Outdoors provides a 1-year warranty on heating elements and a 5-year limited warranty on other sauna heater components for residential usage. Please refer to for detailed warranty information on our products.
12 Reviews Write a Review
  • My Family Love It

    Feb 16th 2024

    Kris Lewett


    I purchased the Thermowood Garden Sauna (8 person) back in early October and after building it, my family and I have been using it these past several weeks. We are in love with this sauna and are using it almost daily. It is especially popular with my surfing son and his buddies, after they surf the cold Pacific just a few blocks from my house in western San Francisco. Beyond that, it has a great look. Around it, we plan to add a few trees to make for a real urban escape. After extensive research, I felt this product from Redwood Outdoors appeared to be the best quality available, and I believe it really turned out to be true. The wood is of very high caliber, precisely milled and retains its deep forest smell. The heating unit is efficient though I’d advise giving it at least 45 minutes to warm up. We lived in/grew up in Northern Europe and used saunas regularly and achieve the same healthy and energizing experience with this product. I built the sauna from the kit, delivered within the week of placing my order. I did it alone, I am handy with tools but not a contractor. It was not easy – it would have gone far faster and less swearing to have a little help -- but one medium skilled person can do the job. I had to call the support people at Redwood Outdoors on several occasions, and they were always enthusiastically determined to solve the small issues that always come up. Our winters being rainy and summers foggy, I added a light clear stain to protect the exterior. This brought out the really nice texture and color of the wood. I also added the shingled roof and a rain gutter at the low end of the roof slope. All in all, we are quite satisfied.

  • Great Experience

    Feb 16th 2024

    Elizabeth Woodstra


    Loved using the redwood sauna during a recent cabin stay! I was amazed to learn they built the sauna there with easy to use instruction. Beautiful design and great time!

  • Love The Sauna

    Feb 16th 2024

    Ben Wales


    Bought their outdoor garden sauna and was pretty happy with the quality and ease of setup. Took about 5 hrs with 2 people and am pretty satisfied with the final product. The windows were bigger than expected which is awesome as our sauna looks out into the woods!

  • Roof Shingles

    Roof Shingles

    Protect your sauna from the elements and keep it looking its best for longer by protecting the wood with a shingled roof. We recommend adding these asphalt shingles to keep water off the sauna and increase the wood’s longevity. The shingles are black in color.

    Add Roof Shingles for $199USD

  • Deluxe Accessory Kit

    Deluxe Accessory Kit

    Take your sauna experience to the next level with our all-in-one deluxe sauna kit. Splash water on the hot rocks and watch the steam rise. Track the temperature and humidity to ensure your sauna is tuned how you like it. Time your session so that you're in the heat for the optimal amount of time.

    The perfect add-on to any new sauna and a great way to take your relaxation to the next level if you already own a sauna.

    Add a Deluxe Accessory Kit for $99USD

  • Adjustable Sauna Recliner

    Adjustable Sauna Recliner

    Take your sauna to the next level with a lie-flat recliner. Compatible with all sauna types (except for the scenic vista) and can be installed in 5 minutes! Relax, lie back, and enjoy the heat.

    Add an Adjustable Sauna Recliner for $279USD



    Shower off after a sauna session or clean up before hopping in the hot tub. The shower’s classic cedar look is perfect for backyards and is the perfect pairing with any of our saunas or hot tubs. With an easy installation process, why not treat yourself to a shower in the great outdoors?

    Add an Outdoor Shower for $499USD

  • Alaskan Cold Plunge Tub

    Alaskan Cold Plunge Tub

    Pair your sauna with a refreshing dip in a cold tub to experience the health and recovery benefits of “Fire & Ice”, a technique used by professional athletes globally. This tub is built to replicate the Finnish tradition of jumping in the snow between sauna sessions. This plunge tub pairs well with any sauna or as a standalone. Add cold therapy to your routine today.

    Add an Alaskan Cold Plunge Tub for $1,999USD

  • We have carefully selected the very best sauna heaters on the market to pair with our saunas. So whichever heater you choose from us, you simply can’t go wrong. All of our heaters are excellent options and will give you a wonderful sauna experience.

    The main things to consider when choosing a heater are: aesthetic preference, wifi vs manual control, drier sauna vs more humid sauna, and of course your budget.

    If you have any questions, our Product Experts would love to help. Give us a call anytime at 1800 567 8036.



    The KIP family of electric sauna heaters are traditional Finnish wall-mounted heaters. They heat up fast and reach high temperatures of ~190F within one hour. This design holds up to 40 lbs of rocks, on which you can douse water to create soothing steam. The KIP creates a relatively dry heat and you should expect ~15-25% relative humidity in the sauna. The KIP comes in an attractive stainless steel exterior case that easily mounts on your sauna wall.

    Harvia is the world’s leading sauna heater manufacturer and Harvia heaters are considered the industry gold standard. Harvia was established in Finland in 1950 and has built an international reputation for exceptional quality. With a Harvia heater, you know you are getting a reliable product that you and your family can trust. All our Harvia sauna heaters are ETL certified and are manufactured in Finland.

  • Harvia Spirit Heater


    The Harvia Spirit sauna heater has an eye-catching and modern design that combines beauty and performance in one package. The soothing curved design of the Harvia Spirit electric heater gives a natural and serene look, which will help put your mind at ease. The Harvia Spirit holds 130 lbs of gorgeous rounded sauna stones that evoke calmness. This generous amount of stones allows bathers to create incredible steam (löyly) in the room. The heater is equipped with a remote WiFi control, which makes usage easy. The Harvia Spirit is truly the spirit of your sauna!

    Harvia is the world's leading sauna heater manufacturer, and Harvia heaters are considered the industry's gold standard. Harvia was established in Finland in 1950 and has built an international reputation for exceptional quality. With a Harvia heater, you know you are getting a reliable product you and your family can trust. All our Harvia sauna heaters are ETL-certified and are manufactured in Finland.



    The HUUM DROP is an award-winning sauna heater. Made in Estonia, this eye-catching heater is quickly emerging as a stand-out in modern sauna design. Its shape is inspired by the purest element in nature – a water drop. Its round design softens and livens up the interior of a classic sauna, giving it a touch of elegance.

    But DROP isn’t only about the looks. This compact wall-mounted heater can fit up to 120 lbs of sauna rocks. This guarantees both hot temperatures and long-lasting steam. The HUUM is fast to heat up and can reach temperatures of ~195F. The HUUM creates more steam than the KIP heater, but less than the Cilindro heater. It's somewhere in the middle in terms of its “löyly” potential.

    Every HUUM DROP heater comes delivered with HUUM sauna stones and a HUUM UKU Wi-Fi controller. This makes it a must-have heater for customers who like a modern look, combined with modern functionality.

  • HUUM HIVE Mini

    HUUM HIVE Mini

    The HIVE Mini electric sauna heater is a smaller version of the popular HIVE sauna heater, perfect for slightly smaller saunas. With its round and majestic design, this sauna heater can still hold up to 170 kg of sauna stones, ensuring long-lasting and mild steam for sauna-goers. The details of the heater are made of durable stainless steel. Its compact size doesn’t compromise on performance, making it a great option for those who want a high-quality sauna experience.

    Every HUUM HIVE Mini heater comes delivered with HUUM sauna stones and a HUUM UKU Wi-Fi controller. This makes it a must-have heater for customers who like a modern look, combined with modern functionality.

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