S4 LUXURY WOOD-FIRED HOT TUB

from $6,640.00

The SOAK-Series Wood-Burning Hot Tub represents the very best in plunge tub quality, efficiency, and luxury.

Inventory Status (Updated 3-Mar-26):
S4B: In stock!
S4N: In stock!

Arrives fully assembled and no electricity required! Submit your order now before all units are sold!

Color:

The SOAK-Series Wood-Burning Hot Tub represents the very best in plunge tub quality, efficiency, and luxury.

Inventory Status (Updated 3-Mar-26):
S4B: In stock!
S4N: In stock!

Arrives fully assembled and no electricity required! Submit your order now before all units are sold!

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 Northern 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 in the luxury of your Model S4 backyard wood-burning hot tub from SaunaLife.

  • 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 (200.7 cm) x 37”H (94 cm)

    • Interior dimensions: 71"Diameter (180.3 cm) x 33"H (83.8 cm)

    • Designed by SaunaLife and handcrafted in Northern Europe

    Model S4N 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)

    • 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 (200.7 cm) x 37”H (94 cm)

    • Interior dimensions: 71"Diameter (180.3 cm) x 33"H (83.8 cm)

    • 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)

    • Model: S4B, S4N

    • 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: 106F

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

    • Shipping Weight: 595 lbs

    • Fully assembled hot tub

    • Steps

    • Insulated cover

    • Drainage with tap

    • Polished stainless steel chimney

    • Chimney cap

    • Flat rate shipping included within the contiguous United States. Additional fees required for shipping to Canada. Shipping rates to Alaska, Hawaii, or Puerto Rico will need to be quoted.

    • 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.

    **Note to Canadian customers: We will need your customs broker information for all palletized orders. For more info on import duties and fees, visit our FAQs.

  • Installation Manual (S4B, S4N)

    Diagram (S4B, S4N)

    Warranty