SaunaLife · Recovery Is a Discipline
SaunaLife Model S4
Soak Series Home Wood-Burning Hot Tub, Natural, Up to 6 Persons
SaunaLife Model S4 Wood-Burning Hot Tub
Overview
Experience the pinnacle of backyard luxury with the SaunaLife Model S4 Tub, designed for those who value relaxation and Nordic-inspired craftsmanship. Built with high-grade, weather-resistant Thermo-Spruce wood, this soothing soaking tub offers an authentic off-grid experience for up to 6 people, eliminating the need for complex electrical wiring or high utility costs.
Key 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
- Durable Thermo-Spruce tub surround (1.65” thick)
- Matching Thermo-Spruce wood steps for easy access
- 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
- Superior thermal resistance (R-value) to retain heat
- 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
WOOD-BURNING HOT TUB
Six-person soak, natural wood
The S4 wood-burning hot tub seats up to six in durable natural Thermowood, heated entirely off-grid by an integrated wood stove.
View specifications
Crafted to Endure
Built for a Lifetime
Premium timber and precision construction that ages beautifully.
View AccessoriesExplore the Details
Tap the markers to see what sets it apart.
Open Soaking Basin
A wide 304-gallon immersion well with contoured seating for up to 6.
Wood-Burning Stove
An external firebox heats the water off-grid - watch the flame as it warms your soak.
Staved Shell & Steps
Matching steps lead over a Thermo-Spruce stave shell engineered for the elements.
Every Detail
Specifications & Details
Full Specifications
Model: MODEL S4
Material: Thermo-Spruce
Exterior Dimensons: 79"Diameter (200.7 cm) x 37"H (94 cm)
Interior Dimensions: 71"Diameter (180.3 cm) x 33"H (83.8 cm)
Water Capacity: 304 Gallons
Product Weight: 441 lbs (200 kg)
Product Weight When Filled: 2976 lbs (1349.9 kg)
Stove Dimensions: 19.8"W (50.3 cm) x 11.8"D (30 cm) x 13.1"H (33.3 cm)
Chimney Dimensions: 0.7"Diameter (1.8 cm) x 95"H (241.3 cm)
Maximum Wood Length: 16" (40.6 cm)
Maximum Temperature: 106°F (41.1°C)
Shipping Dimensions: 91"W (231.1 cm) x 46"D (116.8 cm) x 87"H (221 cm)
Shipping Weight: 595 lbs (269.9 kg)
Specifications subject to change. Please contact us to verify current specifications before purchase.
Dimensions & Weight
Exterior Dimensons: 79"Diameter (200.7 cm) x 37"H (94 cm)
Interior Dimensions: 71"Diameter (180.3 cm) x 33"H (83.8 cm)
Water Capacity: 304 Gallons
Product Weight: 441 lbs (200 kg)
Product Weight When Filled: 2976 lbs (1349.9 kg)
Stove Dimensions: 19.8"W (50.3 cm) x 11.8"D (30 cm) x 13.1"H (33.3 cm)
Chimney Dimensions: 0.7"Diameter (1.8 cm) x 95"H (241.3 cm)
Shipping Dimensions: 91"W (231.1 cm) x 46"D (116.8 cm) x 87"H (221 cm)
Shipping Weight: 595 lbs (269.9 kg)
Materials & Construction
Model: MODEL S4
Material: Thermo-Spruce
Maximum Wood Length: 16" (40.6 cm)
Maximum Temperature: 106°F (41.1°C)
Electrical Requirements
This product requires professional installation by a licensed electrician. Electrical requirements depend on the heater or generator system selected — please refer to the installation manual.
What's Included
- Fully Assembled Hot Tub
- Steps
- Insulated Cover
- Drainage with Tap
- Polished Stainless Steel Chimney
- Chimney Cap
- Installation Instructions
FAQ
What temperature range does the immersion tub reach?
The tub is compatible with SaunaLife's FDC chiller/heater systems. The chiller can cool water down to approximately 37–42°F (3–6°C) and the heater option can warm water up to 104°F (40°C) — perfect for contrast therapy.
How long does it take to reach the target temperature?
With the combined chiller/heater unit, the tub typically reaches cold temperature (below 50°F) within 4–6 hours from ambient temperature. Warm soak temperature is reached in approximately 1–2 hours.
Is a chiller or heater included?
The tub itself is sold separately from the chiller/heater. See our package bundles to add a compatible FDC unit.
How many people can use it at once?
Soak Series Home Wood-Burning Hot Tub, Natural, Up to 6 Persons
What is the warranty?
All SaunaLife immersion tubs include a 5-Year Residential Limited Warranty covering manufacturer defects in materials and workmanship. Contact us at info@saunaco.us to file a claim.
Resources
Documents & Manuals
Installation Manual
Dimensions & Specifications
Care & Maintenance Guide
Limited Warranty
The Experience
Built for Recovery
Cold and contrast therapy, refined for the home. A hand-finished immersion tub engineered for the daily practice of recovery — restore the body, sharpen the mind.
to a friend
The S4N comfortably holds four for a warm evening soak, and the natural finish looks clean on our deck. Temperature control is simple and steady. Sauna Co. confirmed the electrical needs up front and shipped it carefully crated.
We run it warm most nights and cold after workouts — the flexibility is the best part. Plenty of room for four. Delivery was prompt and undamaged.
A heated tub needs proper electrical — support spelled it out clearly. The S4N itself is well-built and comfortable. Shipped on schedule.
The family ends every evening in the S4N. Warm, roomy, and beautifully made. Communication from Sauna Co. was excellent throughout.