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S4B Wood-Fired Outdoor Hot Tub

S4B Wood-Fired Outdoor Hot Tub

The SaunaLife Model S4B brings traditional Nordic-style soaking to the backyard with a fully assembled, wood-fired outdoor hot tub designed for up to six people. Finished in black Thermo-Spruce and featuring a contoured fiberglass interior, the S4B combines natural wood craftsmanship with an efficient off-grid heating system that requires no electrical connection. At the heart of the S4B is a 304 stainless steel wood-burning stove engineered with dual heat compartments for efficient heat transfer. The system draws cooler water through a lower channel and returns heated water through an upper channel, helping circulate heat throughout the tub without an electric pump. According to the supplied specifications, the system can heat approximately 304 gallons of water from 40°F to 95°F in approximately 1.5–2 hours. The spacious fiberglass interior provides comfortable seating for up to six bathers and an easy-to-maintain soaking surface. A thick, steel-reinforced insulated cover helps retain heat between uses, while matching Thermo-Spruce steps provide convenient entry and exit. Handcrafted in Northern Europe and delivered fully assembled, the Model S4B provides a straightforward wood-fired soaking experience for outdoor wellness spaces.
Fits 6 people
Outdoor
$5,990
$5,990 $10,000
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  • 🔥 Built for Recovery
  • 🌲 Premium Materials
  • ✨ Exceptional Comfort

Key Features

Up to 6-Person Capacity: Spacious round design accommodates up to six bathers.

Wood-Fired Heating: Provides traditional hot-water heating without requiring an electrical connection.

304 Stainless Steel Stove: Integrated wood-burning heater uses a durable stainless steel construction.

Dual-Flow Heating System: Cooler water enters through a lower channel and heated water returns through an upper channel to promote even water temperatures.

Rapid Heat-Up: Heats approximately 304 gallons from 40°F to 95°F in approximately 1.5–2 hours under the supplied test conditions.

Up to 106°F Water Temperature: Maximum specified water temperature is 106°F.

Black Thermo-Spruce Exterior: Thermally modified spruce provides a distinctive dark exterior designed for outdoor environments.

Contoured Fiberglass Interior: Thick molded fiberglass creates a smooth and comfortable bathing surface.

304-Gallon Capacity: Generous water volume provides ample room for group soaking.

Insulated Cover: Steel-reinforced foam cover with marine-grade vinyl exterior helps retain heat when the tub is not in use.

Matching Entry Steps: Black Thermo-Spruce steps are included for easier access.

Integrated Drain: Built-in drainage tap simplifies emptying the tub.

No Electricity Required: Wood-fired operation provides an off-grid soaking option without an electrical connection.

Fully Assembled: Delivered as an assembled hot tub for simplified installation.

Handcrafted in Northern Europe: Designed by SaunaLife and manufactured in Northern Europe.

Product Details

Model: S4B

Series: Soak Series

Capacity: Up to 6 People

Product Type: Outdoor Wood-Fired Hot Tub

Exterior Material: Black Thermo-Spruce

Interior Material: Contoured Fiberglass

Heating Type: Wood-Burning

Stove Material: 304 Stainless Steel

Water Capacity: 304 Gallons

Maximum Temperature: 106°F

Heat-Up Performance: Approximately 40°F to 95°F in 1.5–2 Hours

Electricity Required: No

Maximum Wood Length: 16 in

Drainage: Integrated Drainage Tap

Cover: Insulated Steel-Reinforced Foam Cover

Cover Exterior: Dark Grey Marine-Grade Vinyl

Steps: Black Thermo-Spruce

Assembly: Fully Assembled

Installation: Outdoor

Origin: Northern Europe

Included Accessories

• Fully Assembled Model S4B Hot Tub

• 304 Stainless Steel Wood-Burning Stove

• Black Thermo-Spruce Steps

• Insulated Cover

• Integrated Drainage Tap

• Polished Stainless Steel Chimney

• Chimney Cap

• Installation Instructions

Dimensions

Hot Tub

Capacity: Up to 6 People

Exterior Dimensions: 79 in Diameter × 37 in H

Interior Dimensions: 71 in Diameter × 33 in H

Water Capacity: 304 Gallons

Product Weight: 441 lb.

Filled Weight: 2,976 lb.

Wood-Burning Stove

Stove Dimensions: 19.8 × 11.8 × 13.1 in (W × D × H)

Maximum Wood Length: 16 in

Chimney

Chimney Dimensions: 0.7 in Diameter × 95 in H

Shipping

Shipping Dimensions: 91 × 46 × 87 in (W × D × H)

Shipping Weight: 595 lb.

Shipping & Delivery

Flat-Rate Freight: $950 shipping to the contiguous United States and $1,250 to Canada. Remote or complex delivery locations may not qualify for these standard rates and may require an additional freight quote.

Other Delivery Areas: Contact customer service for a custom freight quote.

Delivery Method: Due to the size and weight of the handcrafted hot tub, delivery is scheduled by special appointment. The tub ships securely protected on a wooden pallet with a protective wood enclosure.

Curbside Delivery: The freight carrier provides curbside delivery only and will lower the shipment to ground level. Customers are responsible for moving the tub from the delivery point to its final installation location.

Delivery Coordination: Customers may be contacted before shipment to review delivery details and identify any access conditions that could result in additional delivery requirements or charges.

Shipping Dimensions: 91 × 46 × 87 in (W × D × H)

Shipping Weight: 595 lb.

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S4B Wood-Fired Outdoor Hot Tub
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4 REASONS TO LOVE RODEO

Crafted to Last
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Crafted to Last

Materials chosen for beauty, strength, and natural resistance to heat and moisture.

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Quality Guarantee

Crafted with care, backed by our commitment to quality and your peace of mind.

Full Assembly
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Full Assembly

Our Pro Team will arrive to fully assemble your sauna for you for an additional fee.

UNMATCHED SUPPORT
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UNMATCHED SUPPORT

We offer free delivery and a 5-year warranty to ensure a pefect customer experience.

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KEY FEATURES

PRECISION CONTROL

PRECISION CONTROL

Experience adjustable temperatures from 34°F–131°F for both invigorating cold immersion and relaxing warm water therapy.

PREMIUM CRAFTSMANSHIP

PREMIUM CRAFTSMANSHIP

Natural cedar, refined finishes, and insulated construction combine lasting performance with timeless elegance.

PURE WATER SYSTEM

PURE WATER SYSTEM

Multi-stage filtration, continuous circulation, and ozone sanitation work together to maintain cleaner, fresher water.

SMART PERFORMANCE

SMART PERFORMANCE

An integrated 1 HP chiller, Wi-Fi controls, and all-in-one design deliver effortless operation every day.

Frequently asked questions

Can The Cold Spring be installed outdoors?

Yes. The Rodeo Wellness Cold Spring is designed for both indoor and outdoor installation and features an IPX4 splash-resistant design for dependable performance in a variety of environments. For optimal longevity, we recommend installing the unit on a stable, level surface with adequate drainage and following the installation guidelines provided in the owner's manual.

What temperature range does The Cold Spring offer?

The Cold Spring features a fully adjustable temperature range from 34°F to 131°F (1°C to 55°C), allowing you to enjoy invigorating cold immersion or relaxing warm water therapy in a single, all-in-one system.

How quickly does The Cold Spring cool the water?

Equipped with a powerful 1 HP chiller, The Cold Spring™ can reduce water temperature by up to 9°C (16°F) per hour under ideal operating conditions. Cooling performance may vary depending on ambient temperature, starting water temperature, and environmental conditions.

Does the Cold Spring require external plumbing or additional equipment?

No. The Cold Spring features a fully integrated all-in-one design with a built-in chiller, circulation pump, multi-stage filtration, and ozone sanitation system. No external plumbing or separate cooling equipment is required, resulting in a clean installation and a simplified ownership experience.

How does The Cold Spring maintain water quality?

The Cold Spring combines multi-stage filtration, continuous water circulation, and an integrated ozone sanitation system to help maintain cleaner, fresher water. Following the recommended maintenance schedule and replacing filters as needed will help ensure consistent performance.

Can I control the Cold Spring remotely?

Yes. The integrated Wi-Fi smart control system allows you to monitor and adjust water temperature remotely through the compatible mobile app, making it easy to prepare your plunge before each session.

What are the electrical requirements?

The Coldspring operates on a 110V / 60Hz household power supply and requires a dedicated 15A GFCI-protected circuit. We recommend installation by a qualified electrician to ensure compliance with local electrical codes.

How much water does The Cold Spring hold?

The Cold Spring has a maximum water capacity of 570 liters (approximately 150 gallons) and is designed to comfortably accommodate one person for full-body immersion.

Can The Cold Spring operate continuously?

Yes. The Cold Spring is engineered for continuous 24/7 operation, making it an excellent choice for residential wellness spaces, recovery studios, fitness facilities, spas, hotels, and other commercial environments.

What maintenance is required?

Routine maintenance includes cleaning the pre-filter, replacing the primary filter as recommended, maintaining the proper water level, and periodically refreshing the water. Following the maintenance guidelines in the owner's manual will help keep The Coldspring™ performing at its best.

What warranty does Rodeo Wellness provide?

At Rodeo Wellness, we stand behind every Coldspring we build. Each unit is backed by our warranty covering defects in materials and workmanship under normal use. Warranty coverage varies by product. For complete terms, conditions, and coverage details, please refer to our Warranty Policy.

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Built for the Wild Within

Crafted for recovery, ritual, and a little peace and quiet.
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About Rodeo

At Rodeo we're on a mission to create the best saunas in the world. It all started with a simple realization - existing brands were either overpriced or cheap knock-offs.

So we built the brand we wished existed. A perfect balance of great materials, honest craftsmanship, and clean design at a fair price. We focus on what actually matters - crafting great products that hold up to real, everyday use.

We build with the belief that products should become part of your routine, not end up in a landfill. No trends. No gimmicks. Just great saunas, made the right way by people who care about their craft.

We make saunas for folks who deeply love the art of rest, recovery and relaxation after a hard days work.

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