Introduction
Rediscover the elemental pleasure of hydrotherapy with the SaunaLife Model S4B Wood-Fired Hot Tub. This masterfully crafted tub brings authentic, off-grid luxury to your backyard, eliminating the need for electricity and complex maintenance. By combining a hyper-efficient stainless steel wood stove with a durable, comfortable fiberglass interior, the S4B delivers an unparalleled soaking experience. It’s the perfect centerpiece for quiet evenings under the stars or creating lasting memories with family and friends. As a premier offering from SaunaLife, this hot tub represents the pinnacle of European design and eco-friendly innovation for your personal wellness retreat.
Why Choose This Model / Brand
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Unmatched Heating Speed – The advanced, self-cleaning corrugated stove heats water in a fraction of the time of traditional tubs, getting you relaxing sooner.
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Superior Durability – Thermo-Spruce wood is thermally treated for incredible stability and resistance to the elements, ensuring years of reliable performance.
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All-Inclusive Package – The S4B arrives complete with an insulated, steel-reinforced cover and matching steps, providing exceptional value and convenience.
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European Craftsmanship – Designed and handcrafted in Northern Europe, this hot tub showcases a commitment to quality, performance, and brilliant engineering.
Full Feature List
- Luxury outdoor wood-burning hot tub
- Arrives fully assembled
- No electricity required (eco-friendly)
- Spacious interior holds 304 gallons
- Thick dark grey contoured fiberglass lining for comfort
- Dual-compartment stainless steel wood-burning heater for efficiency
- Rapid 1.5 to 2-hour heat-up time
- 304 stainless steel heater construction
- Polished stainless steel chimney with protective guard
- Durable Thermo-Spruce tub surround (1.65” thick), painted black
- Superior thermal resistance (R-value) to retain heat
- Matching Thermo-Spruce wood steps
- Extra thick, steel-reinforced folding foam cover
- Dark grey marine-grade vinyl cover exterior
- Integrated hot tub drainage tap
Full 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 (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 |
Installation + Setup Info
Placement and Assembly
- The SaunaLife S4B arrives fully assembled and ready for placement.
- Choose a level, stable surface such as a concrete pad, deck, or reinforced patio that can support the filled weight of 3064 lbs.
- Ensure there is adequate clearance around the chimney for safe operation.
First Use
- Simply place the hot tub, install the chimney, fill with a garden hose, and start the wood fire in the stove. No electrical connections are necessary.
Frequently Asked Questions
How is this different from a standard electric hot tub?
The primary difference is the heating source and overall experience. The S4B is completely off-grid, requiring no electricity, which means no complex wiring, no pumps, and no increase in your utility bills. It offers a more rustic, authentic soaking experience with the ambiance of a real wood fire.
What kind of maintenance is required?
Maintenance is straightforward. You will need to periodically drain and refill the water, clean the fiberglass shell with a non-abrasive cleaner, and remove ash from the wood stove. For more tips on maintaining outdoor wellness equipment, check out our guide on the best outdoor saunas.
Can the S4B hot tub be used in the winter?
Absolutely. A wood-fired hot tub is a magical experience in the snow. However, you must take precautions to prevent water from freezing in the tub or stove between uses, which could cause damage. It's best to drain it after each use in freezing climates.
What is Thermo-Spruce wood?
Thermo-Spruce is a premium, eco-friendly wood that has been thermally modified with heat and steam. This process enhances its durability, weather resistance, and stability, making it an ideal material for outdoor products like this hot tub.
How many people can fit comfortably?
The S4B is designed to comfortably accommodate up to 6 adults, making it perfect for both family use and social gatherings.
What accessories complete the experience?
For the ultimate backyard wellness circuit, many customers pair their hot tub with a refreshing rinse station. We highly recommend the matching SaunaLife Barrel Shower Model R3 to create a complete spa-like setup.
