Model S4N Outdoor Wood-Burning Hot Tub

The SaunaLife SOAK-Series Model S4N represents the very best in wood-burning hot tub quality, efficiency, and luxury. Designed and handcrafted in Northern Europe, this premium outdoor hot tub combines advanced heating performance with long-lasting durability for a reliable and comfortable soaking experience.

Ready for Your Hot Tub Party

The Model S4N arrives fully assembled and is easy to set up with no electricity required. It comfortably fits up to 6 people, making it perfect for gatherings or quiet evenings. The ergonomically shaped fiberglass interior offers a smooth, easy-to-clean surface, while the Thermo-Spruce exterior provides excellent durability and weather resistance for long-term outdoor use.

Engineered for Efficiency and Performance

Built for superior performance, this hot tub heats up to three times faster than traditional wood-fired models. Its advanced self-cleaning corrugated stove includes a secondary heat chamber that captures heat from smoke, reducing wood usage by up to 50 percent. The design also superheats the air between the inner tub and outer shell to speed up heating. A smart water circulation system draws cooler water from below and redistributes heated water evenly for consistent temperature.

Start Enjoying Sooner

The Model S4N heats 304 gallons of water from 40°F to 95°F in just 1.5 to 2 hours. Spend less time waiting and more time relaxing with a high-performance outdoor hot tub built for comfort, efficiency, and everyday use.

Premium Features

• Luxury outdoor wood-burning hot tub
• Designed for ergonomic and comfortable soaking
• No electricity required, eco-friendly operation
• Capacity for up to 6 people
• Thick dark gray contoured fiberglass lining
• Stainless steel wood-burning heater with dual heat compartments
• Heater made from 304 stainless steel for durability
• Polished stainless steel chimney with protective cap
• Thermo-Spruce exterior surround (1.65 inches thick)
• High thermal resistance (R-value) to retain heat longer
• Matching Thermo-Spruce steps for easy access
• Extra-thick steel-reinforced insulated foam cover
• Foldable cover for easy removal and storage
• Marine-grade vinyl cover exterior in dark gray
• Integrated drainage tap for easy water release

Thermo-Spruce Material Advantages

Thermo-Spruce is specially treated for outdoor performance and water exposure. It offers:

• Up to 2 times longer lifespan than cedar
• Excellent thermal insulation to retain heat
• Resistance to moisture, warping, and weather damage
• Eco-friendly and sustainable material
• High stability for long-term structural integrity

What’s Included

• Fully assembled hot tub
• Matching Thermo-Spruce steps
• Insulated foldable cover
• Drainage system with tap
• Polished stainless steel chimney
• Chimney cap

Product Specifications

Model: S4N
Material: Thermo-Spruce

Exterior Dimensions:
79" diameter (200.7 cm) x 37" height (94 cm)

Interior Dimensions:
71" diameter (180.3 cm) x 33" height (83.8 cm)

Water Capacity:
304 gallons

Maximum Temperature:
106°F (41.1°C)

Filled Weight:
3064 lbs (1389.8 kg)

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

Shipping Weight:
595 lbs

Stove Dimensions:
19.8"W x 11.8"D x 13.1"H

Chimney Dimensions:
0.7" diameter x 95" height

Maximum Wood Length:
16 inches (40.6 cm)

Designed for Real Outdoor Living

The Model S4N is built for people who want a dependable, high-quality hot tub without relying on electricity. Its efficient heating system, durable materials, and thoughtful design make it ideal for everyday relaxation, social gatherings, and off-grid use.

Enjoy faster heating, lower fuel usage, and long-lasting comfort with a wood-burning hot tub designed to perform in real outdoor conditions.