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Soundlife Model S4 Wood-Fired Hot Tub with dimensions and specifications on a white background

SaunaLife S4N 6-Person Wood-Burning Hot Tub Thermo-Spruce

SKU: SL-MODELS4N/S4N

$6,640.00

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Description

The SaunaLife SOAK-Series Model S4N is a premium wood-fired hot tub designed for elevated outdoor bathing. Crafted with high-performance materials and engineered for exceptional efficiency, it delivers a refined, off-grid soaking experience without the need for electricity.

Built with a durable Thermo-Spruce exterior—lasting up to twice as long as cedar—the Model S4N offers superior thermal resistance, weather durability, and long-term stability in water environments. Its spacious, ergonomically shaped fiberglass interior comfortably accommodates up to six bathers and holds over 304 gallons of water, creating an immersive and relaxing soak.

At its core, a high-efficiency wood-burning stove made from 304 stainless steel uses a dual-chamber combustion system to maximize heat output while reducing wood consumption by up to 50%. The intelligent circulation design draws cooler water from the bottom and redistributes heated water through the upper channel, ensuring consistent temperatures throughout the tub. Additional heat is captured in the air space between the fiberglass lining and the wood surround, accelerating the overall heating process.

Thanks to this advanced system, the Model S4N can heat water from 40°F (5°C) to 95°F (35°C) in approximately 1.5 to 2 hours.

The hot tub arrives fully assembled and ready for installation, requiring no electrical connection. Designed by SaunaLife and handcrafted in Northern Europe, the Model S4N combines traditional wood-fired bathing with modern engineering.

The displayed price includes combined delivery and shipping within the Contiguous United States. For Canadian shipping, please contact us for a custom quote.

Key Features

• Manufacturing: Designed by SaunaLife and handcrafted in Northern Europe
• Heating System: High-efficiency 304 stainless steel wood-burning stove
• Combustion Design: Dual-chamber system for faster heating and reduced wood use
• Construction: Durable Thermo-Spruce exterior with fiberglass interior
• Interior Design: Ergonomically shaped fiberglass for enhanced bather comfort
• Capacity: Accommodates up to 6 bathers
• Water Capacity: 304 gallons
• Heat-Up Time: Approximately 1.5–2 hours
• Electrical Requirement: No electricity required
• Drainage: Integrated drainage tap
• Chimney: Polished stainless steel chimney with protective cap
• Assembly: Delivered fully assembled

Specifications

• Model: S4N
• Material: Thermo-Spruce
• Interior Dimensions: 71" Diameter × 33" Deep
• Exterior Dimensions: 79" Diameter × 37" High
• Water Capacity: 304 Gallons
• Maximum Bathers: Up to 6
• Filled Weight: 3,064 lbs
• Stove Dimensions: 19.8"L × 11.8"W × 13.1"H
• Maximum Wood Length: 16"
• Maximum Temperature: 106°F
• Chimney Dimensions: 95" High × 7" Diameter
• Shipping Dimensions: 91"L × 46"W × 87"H
• Shipping Weight: 595 lbs

Included

• Fully assembled hot tub
• Matching Thermo-Spruce steps
• Extra-thick insulated folding cover with steel reinforcement
• Dark grey marine-grade vinyl cover exterior
• Stainless steel chimney and chimney cap

Description

Thanks to this advanced system, the Model S4N can heat water from 40°F (5°C) to 95°F (35°C) in approximately 1.5 to 2 hours.

The displayed price includes combined delivery and shipping within the Contiguous United States. For Canadian shipping, please contact us for a custom quote.