SaunaLife

SaunaLife Model S4B

The SaunaLife SOAK-Series Model S4B 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 
Regular price $6,940.00 USD
Shipping calculated at checkout.
Quantity :
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa
Science Meets Sanctuary

Discover environments engineered for more than just aesthetics—integrated thermal efficiency, Grade-A hardwoods, and architectural silhouettes designed to elevate your biological performance and daily ritual.

Seamless Integration

Engineered for any environment—whether it’s a modern indoor gym or an expansive outdoor landscape. Our systems offer professional-grade recovery without compromising your property's architectural character.

SaunaLife Model S4B

Regular price $6,940.00 USD
Monthly Estimate
$208/mo
Purchase Price $15,000
$5,000 $61,500
Term
Down Payment $0
Interest 0%
Approval Instant
*Estimated payment for illustration purposes only
Affirm USA Financing
iFinance CAD Financing

A Sanctuary Within Reach

Pay Monthly for Your Suite

We believe that uncompromising quality should be accessible. By partnering with the leaders in consumer financing, we allow you to transform your home spa into a world-class sanctuary today.

Low Monthly Payments

Distribute the cost of your premium sauna or cold plunge over several years.

High Credit Limits

Secure financing for projects up to $40,000 with competitive terms.

Instant Approval

Get a decision in seconds without affecting your credit score for pre-qualification.

Flexible Terms

Choose a plan that fits your lifestyle, with terms ranging from 12 to 84 months.

Everything You Need to Know

Description

Model S4B Outdoor Wood-Burning Hot Tub   

The SaunaLife SOAK-Series Model S4 represents the very best in wood-burning hot tub quality, efficiency, and luxury.  

Ready for your hot tub party  

The Model S4B 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. 

Engineered for efficiency and performance 

Engineered and crafted in the Northers Europe, this super-efficient hot tub heats in 1/3 of the time as traditional wood-fired hot tubs. No electrical connection is required. At the heart of the Model S4 is its ingenious self-cleaning corrugated stove with a secondary chamber that transfers heat from the smoke – reducing wood consumption up to 50% compared with other hot tubs. Brilliantly, the air between the fiberglass lining and the wood exterior is super-heated to accelerate the heating process. The stove is cleverly engineered to draw cooler water through a lower channel and redistribute it though an upper channel to equalize the temperature.  

Start enjoying sooner 

This incredibly efficient wood stove will heat 304 gallons of water from 40°F (5°C) to 95°F (35°C) in 1.5 to 2 hours – the fastest-heating wood-burning hot tub available.  

Relax with friends and family the luxury of your Model S4 backyard wood-burning hot tub from SaunaLife. 

Features

Model S4B Outdoor Wood-Burning Hot Tub   

  • 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 
  • Durable Thermo-Spruce tub surround (1.65” thick), painted black  
  • Superior thermal resistance (R-value) to retain heat  
  • Matching Thermo-Spruce wood steps for easy access 
  • Extra thick steel reinforced foam cover, folds for ease of removal and storage 
  • Dark grey marine grade vinyl cover exterior 
  • Integrated hot tub drainage tap 
  • Up to 6 bathers 
  • Exterior dimensions – 79" diameter and 37” high  
  • Interior dimensions – 71" diameter and 33” deep 
  • Designed by SaunaLife and handcrafted in Northern Europe 

Thermo-Spruce Material Advantages 

  • Lasts up to 2X longer than Cedar 
  • Superior thermal resistance (R-value) 
  • Eco-friendly 
  • Ideal for water use (stable)  
Includes

Model S4B Outdoor Wood-Burning Hot Tub  

  • Fully assembled hot tub 
  • Steps 
  • Insulated cover  
  • Drainage with tap 
  • Polished stainless steel chimney 
  • Chimney cap 
Specification

Model

Model S4B

Material

Thermo-Spruce

Interior Dimensions

71" Diameter x 33"D

Exterior Dimensons

79" Diameter x 37"H

Water Capacity

304 Gallons

Product Weight when filled

3064 lbs

Stove Dimensions

19.8"L x 11.8"W x 13.1"H

Chimney Dimensions

95"H x 4.7" Diameter

Maximum Wood Length

16"

Maximum Temperature

106F

Shipping Dimensions

91"L x 46"W x 87"H

Shipping Weight

595 lbs

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. 

Freight Quote for Other Areas: email logistics@northamericansauna.com  

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. 

Shipping Dimensions: 91"L x 46"W x 87"H

Shipping Weight: 595 lbs

Product Detail & Specifications

Built for those who value quality and wellness. Each product is crafted with carefully selected materials, precision engineering, and thoughtful design that you can enjoy the perfect experience, every time.

SaunaLife Model S4B
Brand
SaunaLife
Manufacturer
SaunaLife
Gross Weight
3064 lbs when filled
Shipping Dimensions
91"L x 46"W x 87"H
Seating Capacity
1-6
Wood Type
Thermo-Spruce
Heating Option
Wood-Burning

Find Your Perfect Match

Compare. Decide. Own It.

We've handpicked our top models so you can compare features and find the one built for your life.

Price
Type
Vendor
Currently Viewing
SaunaLife Model S4B
SaunaLife

SaunaLife Model S4B

$6,940.00
Hot Tubs
SaunaLife
Most Popular
SaunaLife Model CL4G
SaunaLife

SaunaLife Model CL4G

$5,940.00
Traditional Saunas
SaunaLife
Finnmark FD-3 Full Spectrum Infrared Sauna
Finnmark

Finnmark FD-3 Full Spectrum Infrared Sauna

$6,499.00
Infrared Sauna
Finnmark
SaunaLife Model X2
SaunaLife

SaunaLife Model X2

$5,940.00
Traditional Saunas
SaunaLife

Swipe to compare

FAQ

Got Questions? We've Got Answers.

Everything you need to know before, during, and after your purchase — from shipping and financing to warranties and installation.

Still have questions?

+1 (888) 395-0022

Available 24/7 — We answer.

Most of our premium saunas are shipped within 5 to 10 business days. Delivery times vary by model and location, but you can typically expect your sanctuary to arrive within 2 to 4 weeks. Once your order is dispatched, you will receive a tracking number and a dedicated delivery appointment to ensure a seamless arrival.
Yes. We partner with Affirm and Ifinance to offer flexible, transparent monthly payment plans. You can see your personalized options at checkout or directly on the product pages. This allows you to invest in your wellness journey today and pay over time with no hidden fees.
We stand behind the quality of our curated selection. If you change your mind, we accept returns on most unused products in their original packaging within 30 days. Please note that due to the specialized nature of our equipment, return shipping and restocking fees may apply. Our goal is your total satisfaction; contact our specialist team for any specific concerns.
Absolutely. Every sauna and cold plunge we carry is backed by a robust manufacturer’s warranty—often ranging from 1-10 years on specific components like heaters and cabinetry. We only partner with brands known for their long-term reliability and exceptional after-sales support.
We don't offer direct installation, but we partner with certified local technicians across North America. Our specialist team can connect you with a vetted installer in your area. Most of our saunas are also designed for straightforward DIY assembly with detailed instructions included.
We carry over 20 of the world's leading wellness brands including Kohler, ThermaSOL, Golden Designs, Harvia, HUUM, IKI, Narvi, Mr. Steam, Iglucraft, Haljas, Finnmark, Dynamic Sauna, and more. Our catalog spans infrared, traditional, barrel, and cabin saunas as well as cold plunges and wooden hot tubs.
It depends on your goals: Infrared is perfect for deep tissue detox and muscle recovery at lower temperatures, while Traditional saunas offer the classic high-heat, high-humidity experience. If you are unsure, our experts are available 24/7 via live chat to help you design the perfect suite for your home.
In many cases, yes. Saunas are often eligible for HSA or FSA reimbursement when used to treat a specific medical condition (like chronic pain or cardiovascular health) with a Letter of Medical Necessity from your doctor. We recommend checking with your plan provider to maximize your tax-free savings.