SaunaLife S4N: a six person wood fired hot tub in natural thermo-spruce, no electricity needed
The SaunaLife S4N is a wood fired hot tub for up to six people. It arrives fully assembled. The round tub has a natural thermo-spruce exterior, which is spruce baked in a kiln so it stands up to water and weather. Inside is a smooth dark gray fiberglass basin shaped for sitting comfortably. It is about 81 inches across and holds 304 gallons.
A wood stove heats the water, so the tub works anywhere with no power hookup. The stainless steel stove has two chambers to draw more heat from the fire and burn less wood. It brings the water up to soaking temperature in under two hours. A tall chimney carries the smoke above your head. It comes with the stove, the chimney, matching wood steps, an insulated cover that folds up for storage, and a drain tap. Wood care oils and SaunaLife cleaner are optional on the page. Want it in black? See the SaunaLife S4B wood fired hot tub. The SaunaLife S4N ships from My Cozy Outdoors by flat rate freight with No Sales Tax (except WY) and the full manufacturer warranty.
Customer Reviews
Jim R. Smith
Rating: 5/5
Smoking Hot Tub!
I got the Norse Steam SaunaLife wood-fired hot tub, the S4N model, and its been seriously great. It heats up quicker than I expected, usually around an hour and a half, and once its hot, it stays that way for a good long while. The wood-fired system is simple to use, and honestly kind of fun.
The tub itself feels solid and well put together. The thermo-spruce exterior looks beautiful in person, and the fiberglass interior is smooth, deep, and easy to clean. Its the kind of setup that just works without a bunch of fuss, which I really appreciate.
Also, the team at Norse Steam was genuinely great to work with. Super helpful, quick to respond, and made the process really easy from start to finish. It felt like they actually cared that I was happy with it. The tub has totally become a go-to way to unwind, and I wouldnt change a thing.
Tue Jul 29 2025 18:22:36 GMT+0000 (Coordinated Universal Time)
SaunaLife combines innovative engineering with meticulous craftsmanship to create spaces that are beautiful, comfortable, and built for a lifetime of enjoyment and good health. The level of quality and attention to detail that goes into each design is off the charts.
Hand-crafted in Northern Europe by sauna fanatics, each room is created especially for those who understand and crave the health and wellness benefits of sauna bathing. SaunaLife builds each room as if we were making it for ourselves.
SaunaLife Outdoor Saunas
These innovative rooms provide the ability to enjoy your natural surroundings during each sauna session. Crafted of the highest-grade wood materials, each space is designed to withstand changing weather conditions.
The features within each room work in unison to create a comfortable bathing sanctuary that both soothes and invigorates. Select from a variety of sizes and styles of outdoor sauna cabins that best suit your design needs and preferences.
Barrel Outdoor Saunas
Create a personal backyard sauna sanctuary with SaunaLife outdoor sauna barrels. These innovative spaces provide a relaxing experience steps away from your home.
SaunaLife barrel saunas are ergonomically engineered for superior comfort, with contoured seating and arched, and wood slanted backrests. These spaces are available in a variety of sizes and configurations to best suit your bathing needs.
Cube-Series Saunas
Premium quality materials are evident everywhere on Cube-Series Saunas. The exterior wood is made from durable full-length staves that have been organically thermally enhanced. This Thermo-Spruce wood is stronger, more dimensionally stable, naturally resists decay and pests, and will far outlast conventional wood. A complete shingle kit with drip rails ensures superior water management and a dry interior. The bronze-tinted 8mm thick front door is both beautiful and tempered for your safety.
SaunaLife Wood-Burning Hot Tubs
These wood-fired hot tub arrives completely assembled and is easy to set up. Its ergonomically shaped fiberglass tub is a comfortable place for up to 6 people. The interior surface is easy to clean, and the exterior is crafted from thermally enhanced spruce for superior weather resistance and durability.
SaunaLife Cold Plunges
Pre-assembled for easy installation, the enhanced Thermo-Pine wood exterior will last up to 2X longer than cedar and has superior thermal resistance. The spacious fiberglass tub contoured for the shape of your body has a 200-gallon water capacity to allow you to submerge in comfort. Matching Thermo-Pine stairs make it easy to get in and out of the tub.
Highlights
SaunaLife Model S4N Wood-Fired Hot Tub- Soak-Series Home Wood-Burning Hot Tub, Natural, Up to 6 Persons
The SaunaLife SOAK-Series Model S4N represents the very best in wood-burning hot tub quality, efficiency, and luxury.
- Thermo-Spruce materials (lasts up to 2X longer than Cedar)
- Luxury outdoor wood-burning hot tub
- Designed for outdoor ergonomic hot tub bathing experiences
- Arrives fully assembled and no electricity required (eco-friendly)
- Spacious interior holds over 304 gallons of pure water bathing pleasure
- Thick dark grey contoured fiberglass lining provides enhanced bather comfort
- Stainless steel wood-burning heater utilizes dual heat compartments for unmatched efficiency
- Rapid response heat-up time prepares water to ideal temperatures in under 2-hours
- Wood-burning heater constructed of 304 stainless steel
- Polished stainless steel chimney with protection
FAQ
How does a wood-fired hot tub work?
A 304 stainless steel wood-burning stove sits in the tub and heats the water directly, no electrical connection is required. The stove draws cooler water through a lower channel and redistributes it through an upper channel to equalize temperature, while a secondary chamber captures heat from the smoke, cutting wood consumption by up to half versus other tubs.
How long does it take to heat up?
The stove brings the full 304 gallons from 40 degrees Fahrenheit to 95 degrees in about 1.5 to 2 hours, which SaunaLife cites as the fastest heat-up among wood-burning hot tubs, roughly a third of the time traditional designs need. Air super-heated between the fiberglass liner and the wood exterior accelerates the process.
How hot can the water get?
The specifications list a maximum water temperature of 106 degrees Fahrenheit, in the range of a conventional spa. You control the heat by how much wood you burn, and because the stove equalizes water between its lower and upper channels, the warmth spreads through the tub rather than pooling near the heater.
What comes with the tub?
It arrives fully assembled with matching Thermo-Spruce steps, an extra-thick steel-reinforced foam cover in dark grey marine-grade vinyl that folds for storage, an integrated drainage tap, and the polished stainless steel chimney with cap and protection. The included items are also listed in this page’s add-on section so you can confirm them at order time.
What kind of firewood does it use?
The firebox accepts logs up to 16 inches long. The corrugated, self-cleaning stove is built of 304 stainless steel with dual heat compartments, so it burns efficiently and needs less tending, and the polished stainless chimney with cap carries smoke well above the bathers. Seasoned wood in that length is all you need.
How many people fit, and is it comfortable?
Up to six bathers. The ergonomically shaped fiberglass tub is contoured for the body in a thick dark grey lining, and the surrounding Thermo-Spruce staves are 1.65 inches thick for insulation and durability. At 81 inches across outside with a 33-inch water depth, there is genuine soaking room for a family or a group of friends.
Is the tub hard to maintain?
The fiberglass interior surface is easy to clean, and the integrated tap drains the tub for water changes. The Thermo-Spruce exterior lasts up to twice as long as cedar, and this page’s Wood Treatment selector offers wax, paraffin oil, and cleaner. See the whole soak line in our wood fired hot tub collection.
Shipping
Flat Rate Freight: $950 flat rate shipping to the contiguous United States. $1,250 for Canada. Note: On rare occasions, remote or complex delivery areas may not qualify for these rates.
About This Delivery: The weight and packaging of this handcrafted tub requires delivery by special appointment. It arrives on a wooden pallet encased in wood for solid protection. The driver is responsible for “curbside delivery only” and will lower the item to ground level. Prior to shipping this product, we often contact customers to share shipment details and discuss any extenuating delivery circumstances that may complicate or cause additional delivery expenses. Our goal is to ensure your project’s success.
