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Soak-Series Model S4

In Stock · Est. delivery in 1–2 weeks

SaunaLife Model S4 Wood-Fired Hot Tub

Original price $6,650.00 - Original price $6,950.00
Original price
$6,650.00
$6,650.00 - $6,950.00
Current price $6,650.00
Choose a Exterior Finish

LTL Freight Shipping

Scheduled curbside pallet delivery. Ground-level drop-off only. We’ll confirm details after purchase.

Details

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 Plans

Soak-Series Model S4

  • 79" Diameter & 37" Length
Warranty Policies

How Our Warranties Work

SaunaLife sauna environments are covered by our limited lifetime warranty. Click the link below for specific details about our warranty policy.

SaunaLife Warranty

Important Information

Click the links below to view floor plans, installation manuals, diagrams.

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Official manufacturer approval.

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Overview

The SaunaLife SOAK-Series Model S4 represents the pinnacle of wood-burning hot tub design, combining Northern European craftsmanship with exceptional efficiency, refined aesthetics, and true luxury. Built for discerning owners, it delivers a premium soaking experience that blends tradition with advanced engineering.

Ready for your hot tub party

The Model S4 wood-fired hot tub arrives fully assembled for effortless setup and immediate enjoyment. Its ergonomically contoured fiberglass tub is designed for superior comfort, accommodating up to six people with ease. The smooth, non-porous interior is hygienic and easy to clean, while the exterior is constructed from thermally enhanced spruce for outstanding durability and long-lasting weather resistance. Available in elegant Black or Natural Brown finishes, the Model S4 enhances any outdoor space with a sophisticated, high-end look.

Engineered for efficiency and performance

Designed and crafted in Northern Europe, the Model S4 heats up to three times faster than traditional wood-burning hot tubs and operates without any electrical connection. At its core is an advanced self-cleaning corrugated wood stove with a secondary combustion chamber that captures heat from exhaust smoke, reducing wood consumption by up to 50%. Super-heated air circulating between the fiberglass liner and wooden exterior accelerates heat transfer, while the intelligently engineered stove draws cooler water from a lower channel and redistributes warmed water through an upper channel to ensure fast, even temperature distribution throughout the tub.

Start enjoying sooner

This highly efficient wood stove heats 304 gallons of water from 40°F (5°C) to 95°F (35°C) in just 1.5 to 2 hours, making it the fastest-heating wood-burning hot tub available and allowing you to spend more time relaxing and less time waiting.

Relax with friends and family and elevate your outdoor living with the timeless luxury, performance, and craftsmanship of the SaunaLife Model S4 backyard wood-burning hot tub.

Relax with friends and family with 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)
  • 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
  • Handcrafted in Northern Europe
  • Accommodates up to 6 bathers

Specifications

Model Model S4B
Material Thermo-Spruce
Interior Dimensions 71" Diameter x 33"D
Exterior Dimensions 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 106°F
Shipping Dimensions 91"L x 46"W x 87"H
Shipping Weight 595 lbs

What Our Customers Say

"We have it installed at our mountain cabin with no electricity. Heating it while watching the sunset, then soaking under the stars — it's become our family's favorite tradition."
Sarah & Erik Lindqvist
Homeowner, Colorado
"Very easy to set up! The quality is fantastic! It heats up very quickly with a small amount of wood. We had a couple of general questions, and the service department was very quick to get back to us. Everyone has been so friendly from the get go. We love our new hot tub and highly recommend it. We couldn’t be happier."
Marcus Thompson
New York, NY
"Worth every penny. The attention to detail and premium materials make this a standout purchase."
Emily Rodriguez
Miami, FL
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