
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.
Model S4B 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)
Order Confirmation:
As soon as you place your order, you will receive an order confirmation e-mail. This means that we have received your order in our system and pre-authorized your credit card for the purchase. As soon as we receive your order, we automatically reach out to our suppliers to confirm that it is in stock and available for immediate shipment. If your item is on backorder or unavailable, we will void the pre-authorization and reach out to you via e-mail. If your item(s) are available for immediate shipment (within 5 business days), we will process the charges and submit the order for shipment.
Order Shipment:
If your order is stock and we process the charges to your credit card, it will ship within five business days from the date of your order. We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out. If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at customerservice@esteamedsaunas.com.
BETTER HEALTH STARTS TODAY

A sauna is no longer considered a luxury item exclusively for the super wealthy. It’s a long-term investment in your health that is growing rapidly in popularity.
That’s why we’ve partnered with Shop Pay Installments to make it easier than ever for you to get a sauna you love without the stress of paying for it all upfront.
Shop Pay Installments is an easy credit option that gives you more shopping freedom with up to 12 months interest free.
Just choose Shop Pay Installments as your payment option at checkout to get started.
GET YOUR SAUNA AND LEAVE THE STRESS OF PAYING UPFRONT BEHIND
Shop Pay Installments is an easy and secure way to spread out the cost of your purchase with easy monthly payments while you enjoy the benefits of your sauna.
Some perks of Shop Pay Installments include:
- Automatic payments
- Simple pre-approval
- No late fees
- No fine print
- No sign up fees
- Checking eligibility doesn't impact your credit
- Easy monthly installments
- NO prepayment penalties
- Join over 11 million shoppers in paying over time for the things you need the most to support your health

Most importantly, Shop Pay Installments financing helps make getting your personal sauna exactly how it should be -- easy and stress-free.
Here are a few example purchases using Shop Pay Installments:
- An $800 purchase could be split into
- 12 monthly payments of $72.21 at 15% APR
or - 4 interest-free payments of $200 every 2 weeks
- A $5,000 sauna purchase could split into
- 12 monthly payments of $451.29 at 15% APR
or - 4 interest-free payments of $1,250 every 2 weeks
Disclosures:
- The Shop Pay Installments uses Affirm's technology beneath the surface. Links below to Affirm represent the Shop Pay Installments policies.
- Rates vary from 0%-36% APR. Payment options through Shop Pay Installments, are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. State notices to consumers affirm.com/licenses.
We work very hard to ensure that we offer the absolute best prices online. If you find another online store that offers a lower price then us within six months of your purchase date please let us know and we will refund your original payment for the difference. We want you to feel confident that you are getting the absolute best price for the product you are ordering. If you find that our own website has a lower price for the same item you have ordered within six months of your purchase date will refund the difference as well.
To request your partial refund simply e-mail us a link to the same product on our website, or on our competitors website within six months from the date of your order and we will process the credit accordingly.
Our 100% Price Guarantee has some limitations:
- You must purchase the item from our website before requesting your Price Match Guarantee
- Promotions such as rebates and buy one, get one free offers are not eligible
- The item must be in stock on the competitors website
- The competitor must be an online store, they may not have a retail location
- The website can not be a discounter or auction website (ie; eBay, overstock, etc..)
- The competitor must be an Authorized Retailer of the product in question
- The Price Match Guarantee includes the item price and the shipping charges, it excludes sales tax