SaunaLife Soak Series Model S4B Home Wood-Burning Hot Tub, Black, Up to 6 Persons

Experience Nordic-inspired outdoor wellness with the SaunaLife Model S4B, a premium 6-person wood-fired hot tub designed for efficient off-grid heating, natural craftsmanship, and elevated backyard relaxation.

SaunaLife Model S4B Wood-Fired Hot Tub – Premium 6-Person Outdoor Soaking Tub

The SaunaLife Model S4B Wood-Fired Hot Tub brings the timeless appeal of Nordic outdoor bathing to your own backyard. Designed for up to six people, this beautifully crafted wood-burning hot tub combines natural Thermo-Spruce construction, an efficient integrated wood stove, and a comfortable fiberglass interior to create a distinctive outdoor wellness experience.

The S4B is an excellent choice for homeowners looking to create a private wellness retreat, complement an outdoor sauna, or add a sophisticated soaking experience to a backyard, patio, pool area, or vacation property.

Premium Thermo-Spruce Construction

The exterior of the Model S4B is crafted from thermally modified Thermo-Spruce, selected for its durability, weather resistance, and distinctive natural appearance. The thermal modification process enhances the wood's suitability for outdoor environments while preserving the warm, Scandinavian aesthetic that defines the SaunaLife collection.

Inside, an ergonomically shaped fiberglass tub provides a smooth and comfortable soaking surface for up to six people. The non-porous interior is easy to clean and maintain, making the S4B practical for regular use while maintaining its refined appearance.

Efficient Wood-Fired Hot Tub Heating

Enjoy the traditional experience of a wood-fired hot tub without requiring an electrical connection. The Model S4B uses an integrated high-efficiency wood-burning stove designed to maximize heat transfer while reducing fuel consumption.

Its corrugated stove incorporates a secondary heat-transfer chamber that captures additional energy from the smoke, helping reduce wood consumption by up to 50% compared with other hot tubs.

The heating system is also engineered to promote efficient water circulation. Cooler water is drawn through a lower channel and heated water is redistributed through an upper channel, helping maintain a more consistent temperature throughout the tub.

Fast Heating with No Electricity Required

The S4B is designed to heat substantially faster than many conventional wood-fired hot tubs. A heated air space between the fiberglass liner and Thermo-Spruce exterior further supports heat transfer and overall thermal efficiency.

The integrated wood stove can heat approximately 304 gallons of water from 40°F (5°C) to 95°F (35°C) in approximately 1.5 to 2 hours, depending on operating and environmental conditions.

This combination of efficient heating and electricity-free operation makes the S4B particularly appealing for homeowners seeking an off-grid hot tub or a more natural alternative to traditional electrically heated models.

Designed for Six-Person Outdoor Relaxation

With capacity for up to six people, the SaunaLife Model S4B offers plenty of space for shared soaking without compromising the intimate feel of a private backyard retreat.

The tub arrives fully assembled, helping simplify installation and allowing you to incorporate it into your outdoor wellness space with minimal setup.

Pair the S4B with a SaunaLife outdoor sauna for a Scandinavian-inspired wellness environment, or enjoy it independently as a relaxing centerpiece for your backyard or outdoor living area.

Elevate Your Backyard Wellness Space

The SaunaLife Model S4B combines Nordic-inspired design, premium Thermo-Spruce construction, efficient wood-fired heating, off-grid operation, and six-person capacity in one beautifully considered outdoor soaking experience.

Whether you're unwinding after a long day, spending time with family and friends, or creating a dedicated home wellness retreat, the S4B brings the warmth and simplicity of traditional wood-fired bathing into a refined modern setting.

SaunaLife Model S4B — premium Nordic-inspired soaking with efficient wood-fired performance for an elevated outdoor wellness experience.

• Black 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 black contoured fiberglass lining provides enhanced bather comfort
• Durable black Thermo-Spruce tub surround (1.65” thick)
• Matching black 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

• Fully Assembled Hot Tub
• Steps
• Insulated Cover
• Drainage with Tap
• Polished Stainless Steel Chimney
• Chimney Cap
• Installation Instructions

About SaunaLife

SaunaLife is a premier manufacturer of luxury saunas, dedicated to creating the ultimate wellness experience for homes and outdoor spaces. With roots in Northern Europe, SaunaLife combines centuries of traditional sauna craftsmanship with modern innovation, using only the finest sustainably sourced materials.

Every sauna is meticulously designed and handcrafted to provide exceptional comfort, durability, and performance. From robust Thermo-Spruce exteriors to smooth Thermo-Aspen benches, SaunaLife saunas are engineered for superior airflow, ergonomic seating, and long-lasting beauty.

SaunaLife is committed to enhancing your well-being by delivering products that elevate relaxation, health, and the overall home experience. Each sauna reflects a dedication to quality, functionality, and timeless Nordic design, making SaunaLife the trusted choice for those seeking the pinnacle of sauna luxury.

Experience the SaunaLife difference—where tradition, innovation, and wellness meet.

Flat Rate Tub Freight: $950 flat rate shipping to the contiguous United States. $1,250 for Canada. Note: On rare occasions, remote or complex delivery areas may not qualify for these rates.

Freight Quote for Other Areas: Email info@elitecorehealth.com

About This Delivery: 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. Our goal is to ensure your project’s success.

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)

Due to the size and handcrafted nature of our sauna rooms, all sales are final and not eligible for return.

In the rare event that your order arrives damaged, we will work closely with you to resolve the issue as efficiently as possible. When feasible, replacement parts will be provided to avoid the need to return the entire room.

If all reasonable solutions have been exhausted and a return is deemed the only viable option, the request will be reviewed on a case-by-case basis and must be approved by our supplier. Approved returns may be subject to restocking, freight, or handling fees.

Our goal is always to ensure your satisfaction while minimizing disruption to your project. Please contact us at info@elitecorehealth.com promptly upon delivery if you experience any issues so we can assist right away.

Installation Manual

Dimensions

Warranty