Model S4 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 S4 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.
About SaunaLife
We chose to work with SaunaLife for their commitment to sustainability, quality and dedication to growing awareness of the life-changing benefits of sauna bathing in North America. SaunaLife outdoor saunas are engineered and innovated in collaboration with Nordic teams from the birthplace of saunas. They are constructed with beautiful woods from Northern Europe that embody Scandinavian heritage and craft, and their wooden materials are sustainably sourced, more durable, and lower in price.
We invite you to reach out and learn more about how you can Live the SaunaLife!
Why Order from Us? PEACE OF MIND
Our Peace of Mind Ordering process means we carefully review every custom order before sending to manufacturing. If we have any questions about the consistency or accuracy of your order, we will contact you for clarifications. You'll receive a confirmation email from us when your review is complete (typically within 24-48 hours).
Questions about ordering? Please don't hesitate to call or chat with us regarding any pre-order questions - we're here to help! We can also take orders over the phone. Contact Us
Features
Model S4 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)
Materials
The Model S4's ergonomically shaped fiberglass lining is easy to clean, and the exterior is crafted from thermally enhanced spruce for superior weather resistance and durability.
Additional Features
- Fully assembled hot tub
- Steps
- Insulated cover
- Drainage with tap
- Polished stainless steel chimney
- Chimney cap
Floor Plan

Soak-Series Model S4
- 79" Diameter & 37" Length
Includes
Model S4 Outdoor Wood-Burning Hot Tub
- Fully assembled hot tub
- Steps
- Insulated cover
- Drainage with tap
- Polished stainless steel chimney
- Chimney cap
Specifications
Model | Model S4 |
---|---|
Material | Thermo-Pine |
Interior Dimensions | 71"Diameter x 33"D |
Exterior Dimensons | 79"Diameter x 37"H |
Water Capacity | 304 Gallons |
Product Weight when filled | 3064lbs |
Stove Dimensions | 19.8"D x 11.8"W x 13.1"H |
Chimney Dimensions | 4.7"Diameter x 95"H |
Maximum Wood Length | 16" |
Maximum Temperature | 106F |
Shipping Dimensions | 91"L x 46"W x 87"H |
Shipping Weight | 595 lbs |
Resources
Manuals and Guides (Downloadable)
Disclaimer and Warnings
We do our best at YardJoyment.com to provided all the information you need to understand and customize your purchase. Before installing or using this product, please fully read all included, official and current manuals and documentation provided by the manufacturer. Information you find here on our website is for reference only.
Shipping and Returns
Shipping
- There is a $950 flat rate shipping charge in the contiguous 48 states on this product.
- Orders from SaunaLife typically ship in 2-3 days. Once your order ships you will receive tracking information, instructions and an estimated day of arrival.
- Once your order ships, transit time is typically 5-8 days with most carriers.
- If there is a delay in your order, we will notify you. We thank you for your business and appreciate your patience with unforeseen delays as we work with the supplier to get your items to you as soon as possible.
- IMPORTANT: Please use the best email and phone number on your order to communicate with the carrier. They will contact you directly to schedule drop-off.
Delivery
- The weight and size of this crate require truck delivery by special appointment (LTL), on an oversized pallet. You will be contacted to schedule a delivery appointment.
- The driver is responsible for curbside delivery only and will lower the items to ground level. Depending on the size of your item, it may be handy to have assistance and a dolly available.
- Carriers are required to provide you 15 minutes to look over your order. We recommend always signing "upon inspection".
- Please plan to unbox your items and inspect them right away. You must notify us within 48 hours of any inaccuracies or damages that may have occurred during transit to qualify for a return.
Returns, Exchanges and Cancellations
- You may cancel your order for a SaunaLife product any time before it ships for a full refund.
- After shipment, returns/exchanges are allowed for SaunaLife products within 30 days of receipt.
- Returned items must be undamaged, under full warranty, and returned in original packaging (including any palettes for items that arrived by freight).
- Shipping and handling for returns that are not within 48 hours and not due to damage are the responsibility of the customer.
- Handling fees are a minimum of 2.9% of the order total.
- There is a 25% restocking fee for SaunaLife products. If you wish to exchange the product for something else, we may be able to assist you with the restocking fee depending on your order.
- Please see our Returns Policy and instructions to initiate a return. To qualify for a return and refund, all returns must be initiated via email and our return form.
