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SaunaLife Model S4B Wood-Fired Hot Tub, 6-Person Outdoor Thermo-Spruce Spa
SaunaLife Model S4B Wood-Fired Hot Tub, 6-Person Outdoor Thermo-Spruce Spa
SaunaLife Model S4B Wood-Fired Hot Tub, 6-Person Outdoor Thermo-Spruce Spa
SaunaLife Model S4B Wood-Fired Hot Tub, 6-Person Outdoor Thermo-Spruce Spa

SaunaLife Model S4B Wood-Fired Hot Tub, 6-Person Outdoor Thermo-Spruce Spa

<p><strong>Authorized Dealer- Full Warranty Included</strong></p>

Authorized Dealer- Full Warranty Included

Sale price$6,940.00
SKU: SL-MODELS4B

Questions? Call Us +1 307 218 7877 Available: Monday - Friday: 8 AM - 9 PM MST Saturday: 10 AM - 5 PM MST

In stock
SaunaLife Model S4B Wood-Fired Hot Tub, 6-Person Outdoor Thermo-Spruce Spa
SaunaLife Model S4B Wood-Fired Hot Tub, 6-Person Outdoor Thermo-Spruce Spa Sale price$6,940.00
Description

The SaunaLife Model S4B Wood-Fired Hot Tub is a fully assembled outdoor soaking tub designed for off-grid relaxation, Nordic-inspired craftsmanship, and efficient wood-fired heating. Built with durable black Thermo-Spruce and a thick black contoured fiberglass interior, this outdoor hot tub provides a comfortable bathing experience for up to 6 bathers. The integrated 304 stainless steel wood-burning stove is engineered for efficient heat performance. It can heat approximately 304 gallons of water from 40°F to 95°F in about 1.5 to 2 hours, depending on starting water temperature, outdoor conditions, and fuel quality. No electrical connection is required, making the Model S4B suitable for backyards, cabins, retreats, and outdoor wellness spaces. Designed by SaunaLife and handcrafted in Northern Europe, it combines traditional wood-fired bathing with modern comfort, heat retention, and easy maintenance.

Features
  • Outdoor wood-fired hot tub designed for up to 6 bathers
  • Fully assembled for easier setup
  • No electrical connection required
  • Black Thermo-Spruce exterior for outdoor durability
  • Thermo-Spruce material lasts up to 2x longer than cedar
  • Thick black contoured fiberglass lining for comfort and easy cleaning
  • Spacious interior holds 304 gallons of water
  • 304 stainless steel wood-burning heater
  • Dual heat-compartment stove design for improved efficiency
  • Corrugated self-cleaning stove design
  • Secondary heat chamber helps transfer heat from smoke
  • Reduces wood consumption by up to 50% compared with other hot tubs
  • Lower-to-upper water channel design helps equalize water temperature
  • Heats water from 40°F to 95°F in approximately 1.5–2 hours
  • Polished stainless steel chimney with protection
  • Superior thermal resistance for heat retention
  • Extra-thick steel-reinforced foam cover
  • Dark grey marine-grade vinyl cover exterior
  • Integrated hot tub drainage tap
  • Matching black Thermo-Spruce steps included
  • Designed by SaunaLife and handcrafted in Northern Europe
Specifications
Specification Details
Brand SaunaLife
Model Model S4B
Product Type Outdoor Wood-Fired Hot Tub
Capacity Up to 6 bathers
Material Black Thermo-Spruce
Interior Material Thick black contoured fiberglass lining
Exterior Dimensions 79" Diameter x 37" H
Interior Dimensions 71" Diameter x 33" H
Water Capacity 304 gallons
Product Weight 441 lbs
Product Weight When Filled 2,976 lbs
Stove Material 304 stainless steel
Stove Dimensions 19.8" W x 11.8" D x 13.1" H
Chimney Polished stainless steel with protection
Chimney Dimensions 0.7" Diameter x 95" H
Maximum Wood Length 16"
Maximum Temperature 106°F
Cover Extra-thick steel-reinforced foam cover
Cover Exterior Dark grey marine-grade vinyl
Drainage Integrated drainage tap
Power Requirement No electrical connection required
Shipping Dimensions 91" W x 46" D x 87" H
Shipping Weight 595 lbs
Origin Designed by SaunaLife and handcrafted in Northern Europe
Included
  • Fully assembled hot tub
  • Integrated 304 stainless steel wood-burning heater
  • Matching black Thermo-Spruce steps
  • Insulated cover
  • Drainage system with tap
  • Polished stainless steel chimney
  • Chimney cap
  • Installation instructions
Resources
Shipping Info

Standard in-stock products are processed within 1–2 business days, Monday–Friday. Estimated transit times after shipment:
Ground shipping: 3–7 business days for accessories, controls, Vital Red Light products, and some smaller heaters or lightweight components
LTL freight: 5–12 business days for full sauna units, large heaters, heater-and-stone bundles, heavy or palletized products and oversized or pre-assembled saunas. See our Shipping Policy for full details.

Return Info

Return requests for eligible products must be submitted within 30 calendar days of delivery if the item is new, unused, uninstalled, and in its original packaging with all parts and accessories included. A Return Authorization (RA) is required before shipping any return. Some items are non-returnable. See our Return & Refund Policy for full details.

Wood Fired Outdoor Hot Tub Built for Lasting Comfort

Designed for outdoor relaxation with durable materials, simple operation, and thoughtful craftsmanship. This hot tub offers a classic soaking experience suited for year-round use in outdoor settings.

Modern cabin with hot tub on a wooden deck by a body of water

Frequently Asked Questions

Understanding Hot Plunge

Hot plunge involves soaking in warm water as part of a structured relaxation or contrast routine. Often used alongside saunas or cold exposure, it’s valued for its calming, restorative feel and its role in intentional wellness practices.

Learn more

Have questions about choosing the right hot tub?

Speak to an expert

Let us assist you. Book an appointment with one of our Sauna sanctum expert to get answer to all of your concerns!

Book now
Description

The SaunaLife Model S4B Wood-Fired Hot Tub is a fully assembled outdoor soaking tub designed for off-grid relaxation, Nordic-inspired craftsmanship, and efficient wood-fired heating. Built with durable black Thermo-Spruce and a thick black contoured fiberglass interior, this outdoor hot tub provides a comfortable bathing experience for up to 6 bathers. The integrated 304 stainless steel wood-burning stove is engineered for efficient heat performance. It can heat approximately 304 gallons of water from 40°F to 95°F in about 1.5 to 2 hours, depending on starting water temperature, outdoor conditions, and fuel quality. No electrical connection is required, making the Model S4B suitable for backyards, cabins, retreats, and outdoor wellness spaces. Designed by SaunaLife and handcrafted in Northern Europe, it combines traditional wood-fired bathing with modern comfort, heat retention, and easy maintenance.

Features
  • Outdoor wood-fired hot tub designed for up to 6 bathers
  • Fully assembled for easier setup
  • No electrical connection required
  • Black Thermo-Spruce exterior for outdoor durability
  • Thermo-Spruce material lasts up to 2x longer than cedar
  • Thick black contoured fiberglass lining for comfort and easy cleaning
  • Spacious interior holds 304 gallons of water
  • 304 stainless steel wood-burning heater
  • Dual heat-compartment stove design for improved efficiency
  • Corrugated self-cleaning stove design
  • Secondary heat chamber helps transfer heat from smoke
  • Reduces wood consumption by up to 50% compared with other hot tubs
  • Lower-to-upper water channel design helps equalize water temperature
  • Heats water from 40°F to 95°F in approximately 1.5–2 hours
  • Polished stainless steel chimney with protection
  • Superior thermal resistance for heat retention
  • Extra-thick steel-reinforced foam cover
  • Dark grey marine-grade vinyl cover exterior
  • Integrated hot tub drainage tap
  • Matching black Thermo-Spruce steps included
  • Designed by SaunaLife and handcrafted in Northern Europe
Specifications
Specification Details
Brand SaunaLife
Model Model S4B
Product Type Outdoor Wood-Fired Hot Tub
Capacity Up to 6 bathers
Material Black Thermo-Spruce
Interior Material Thick black contoured fiberglass lining
Exterior Dimensions 79" Diameter x 37" H
Interior Dimensions 71" Diameter x 33" H
Water Capacity 304 gallons
Product Weight 441 lbs
Product Weight When Filled 2,976 lbs
Stove Material 304 stainless steel
Stove Dimensions 19.8" W x 11.8" D x 13.1" H
Chimney Polished stainless steel with protection
Chimney Dimensions 0.7" Diameter x 95" H
Maximum Wood Length 16"
Maximum Temperature 106°F
Cover Extra-thick steel-reinforced foam cover
Cover Exterior Dark grey marine-grade vinyl
Drainage Integrated drainage tap
Power Requirement No electrical connection required
Shipping Dimensions 91" W x 46" D x 87" H
Shipping Weight 595 lbs
Origin Designed by SaunaLife and handcrafted in Northern Europe
Included
  • Fully assembled hot tub
  • Integrated 304 stainless steel wood-burning heater
  • Matching black Thermo-Spruce steps
  • Insulated cover
  • Drainage system with tap
  • Polished stainless steel chimney
  • Chimney cap
  • Installation instructions
Resources
Shipping Info

Standard in-stock products are processed within 1–2 business days, Monday–Friday. Estimated transit times after shipment:
Ground shipping: 3–7 business days for accessories, controls, Vital Red Light products, and some smaller heaters or lightweight components
LTL freight: 5–12 business days for full sauna units, large heaters, heater-and-stone bundles, heavy or palletized products and oversized or pre-assembled saunas. See our Shipping Policy for full details.

Return Info

Return requests for eligible products must be submitted within 30 calendar days of delivery if the item is new, unused, uninstalled, and in its original packaging with all parts and accessories included. A Return Authorization (RA) is required before shipping any return. Some items are non-returnable. See our Return & Refund Policy for full details.