SaunaLife Model S4 Wood-Fired Hot Tub
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. You’ll enjoy a top-of-the-line outdoor bathing experience with a combination of exceptional quality, efficiency, and luxury that only the SaunaLife SOAK-Series Model S4 can provide.
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 provides a comfortable bathing experience for up to 6 people. The interior surface is easy to clean, while the exterior is crafted from thermally enhanced spruce for superior weather resistance and long-lasting durability.
Engineered for Efficiency and Performance
Engineered and crafted in Northern Europe, this highly efficient hot tub heats in 1/3 of the time of traditional wood-fired hot tubs. No electrical connection is required.
At the core of the Model S4 is an ingenious self-cleaning corrugated stove with a secondary chamber that transfers heat from the smoke, reducing wood consumption by up to 50% compared with other hot tubs.
The system is designed with smart airflow technology: the air between the fiberglass lining and the wood exterior is super-heated to accelerate heating. The stove also draws cooler water through a lower channel and redistributes it through an upper channel to equalize temperature efficiently.
Start Enjoying Sooner
This highly efficient wood stove heats 304 gallons of water from 40°F (5°C) to 95°F (35°C) in 1.5 to 2 hours, making it one of the fastest-heating wood-burning hot tubs available.
Relax with friends and family and enjoy the luxury of your Model S4 backyard wood-burning hot tub from SaunaLife.
Features
- 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)
Specifications
- Weight: 595 lbs
- Width / Depth: 79"D
- Height: 37"H
- Fully assembled hot tub
- Steps
- Insulated cover
- Drainage with tap
- Polished stainless steel chimney
- Chimney cap
Resources
Features
At Inside Sauna, we aim to offer some of the most competitive sauna prices available online. To maintain fair and consistent pricing, we work closely with our manufacturers and comply with Minimum Advertised Price (MAP) policies. These guidelines help protect our customers and ensure ethical pricing among authorized retailers.
If you find the same product listed at a lower price on another online store, please reach out to us. Our team will review the offer to confirm it meets MAP requirements and dealer authorization standards. Once verified, we will gladly match the price.
Already placed your order? No problem — we can provide a partial refund or apply a custom price adjustment where applicable.
Price Match Eligibility Requirements
To ensure fairness and accuracy, the following conditions apply:
- Promotional offers such as rebates, coupon codes, or “buy one, get one” deals are excluded
- The competing product must be currently in stock
- The competitor must operate as an online-only store (no physical locations)
- Auction platforms, liquidation sites, and discount marketplaces are not eligible
- The competitor must be an authorized dealer of the specific product
If you want to verify whether a product qualifies for price matching before purchasing, we recommend contacting us first. Our support team will review the details and assist you.
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