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

$7,324.99
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Model S4B Outdoor Wood-Burning Hot Tub   

The SaunaLife SOAK-Series Model S4 represents the very best in wood-burning hot tub quality, efficiency, and luxury.  

Ready for your hot tub party  

The Model S4B wood-fired hot tub arrives completely assembled and is easy to set up. Its ergonomically shaped fiberglass tub is a comfortable place for up to 6 people. The interior surface is easy to clean, and the exterior is crafted from thermally enhanced spruce for superior weather resistance and durability. 

Engineered for efficiency and performance 

Engineered and crafted in the Northers Europe, this super-efficient hot tub heats in 1/3 of the time as traditional wood-fired hot tubs. No electrical connection is required. At the heart of the Model S4 is its ingenious self-cleaning corrugated stove with a secondary chamber that transfers heat from the smoke – reducing wood consumption up to 50% compared with other hot tubs. Brilliantly, the air between the fiberglass lining and the wood exterior is super-heated to accelerate the heating process. The stove is cleverly engineered to draw cooler water through a lower channel and redistribute it though an upper channel to equalize the temperature.  

Start enjoying sooner 

This incredibly efficient wood stove will heat 304 gallons of water from 40°F (5°C) to 95°F (35°C) in 1.5 to 2 hours – the fastest-heating wood-burning hot tub available.  

Relax with friends and family the luxury of your Model S4 backyard wood-burning hot tub from SaunaLife. 

Features

    Model S4B Outdoor Wood-Burning Hot Tub   

    • 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 dark grey contoured fiberglass lining provides enhanced bather comfort 
    • 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 
    • Durable Thermo-Spruce tub surround (1.65” thick), painted black  
    • Superior thermal resistance (R-value) to retain heat  
    • Matching Thermo-Spruce wood steps for easy access 
    • 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 and 37” high  
    • Interior dimensions – 71" diameter and 33” deep 
    • Designed by SaunaLife and handcrafted in Northern Europe 

    Thermo-Spruce Material Advantages 

    • Lasts up to 2X longer than Cedar 
    • Superior thermal resistance (R-value) 
    • Eco-friendly 
    • Ideal for water use (stable)

    Includes

    Model S4B Outdoor Wood-Burning Hot Tub  

    • Fully assembled hot tub 
    • Steps 
    • Insulated cover  
    • Drainage with tap 
    • Polished stainless steel chimney 
    • Chimney cap 

    Specifications

    Model

    Model S4B

    Material

    Thermo-Spruce

    Interior Dimensions

    71" Diameter x 33"D

    Exterior Dimensons

    79" Diameter x 37"H

    Water Capacity

    304 Gallons

    Product Weight when 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

    106F

    Shipping Dimensions

    91"L x 46"W x 87"H

    Shipping Weight

    595 lbs

    Document Libary

    Model S4 Installation Manual
    Model S4 Diagram
    Warranty


    Shipping Information

    FREE & FAST SHIPPING SAVE Hundreds Today with Free Shipping on All Orders. We Ship to ALL 48 Lower States (We do not ship to Puerto Rico, Hawaii, Alaska)

    Lead Time - 3-7 Business Days De pending on Product
     - Once You Place an Order, We immediately begin processing, the order request is sent to our warehouse and is prepared for pickup, it then usually takes around 3-7 business days to be picked up for transit.

    Transit Time
     - Transit Time can vary depending on the distance between your location and the warehouse but you can expect the item to arrive between 3-8 business days after pickup.

    Our Shipping Partners: FedEx, UPS, Freight Club (among others)

    Shipping Partners
    We partner with the most reliable freight companies in the USA to ensure your order arrives safe and in a timely manner.

    Your Item will ship from warehouses all across the United States to ensure fast and efficient delivery times for our customers.

    If there are any delays regarding your product shipment, we will let you know in advance. 

    Order Confirmation:

    As soon as you place your order, you will receive an order confirmation e-mail. (please allow a few hours for this to come through in some cases) This means that we have received your order in our system and pre-authorized your credit card for the purchase. 

    As soon as we receive your order, we automatically reach out to our suppliers to confirm that it is in stock and available for immediate shipment. 

    If your item is on backorder or unavailable, we will void the pre-authorization and reach out to you via e-mail.  If your item(s) are available for immediate shipment (within 5 business days), we will process the charges and submit the order for shipment.

    Order Shipment:

    If your order is in stock and we process the charges to your credit card, it will ship within five business days from the date of your order.  We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out.  If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at sales@buildthepower.com

    No Shipping outside the USA. (Some exceptions apply - if the website permits you to check out and enter your shipping address, you will receive your order. Some products in particular are available in Canada).

    Shipping Options

    Our base "Curb-side" Pickup shipping is always completely free! This option usually takes between 5-15 days to arrive at your doorstep, after you have submitted your order.

    Threshold Shipping: This involves the item being brought onto your porch, or into a sheltered/garage area. 

    Double-Check Your Address

    To ensure that your package is properly delivered and that you receive your package within the time frames we advertise, please
    make sure that your address is correctly entered and includes all relevant and/or required information. The use of correct
    abbreviations, street numbers, building or apartment numbers, and route information (if applicable) is critical for ensuring
    timely delivery. 
    We do not take responsibility for lost, misplaced, or incorrectly delivered shipments if the address information
    provided is incorrect or incorrectly entered at the time of purchase
    .

    Damages

    Please inspect the packaging of your item(s) when they arrive, if you notice any damage, you should make note of it when signing for delivery.  If your item(s) do arrived damaged please send photos of damage, box and SKU, along with a brief description of the damage to sales@buildthepower.com and we will process an insurance claim on your behalf. Photos and videos must be sent for freight damage within 24 hours of arrival or the freight damage claim will not be valid. Any punctures, or visible signs of exterior damage must be reported within 24 hours.

    Warranty

    10 Years

    Return Information

    We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

    Should you decide to cancel your order prior to its shipment, a 3% deduction will be applied to cover platform fee expenses from the total paid amount.

    To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. Items that are not in this condition will not be accepted.

    To start a return, you can contact us at sales@buildthepower.com If your return is accepted, we'll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.

    Returns for reasons other than damaged items will require a 15-25% re-stocking fee, this depends on the size and freight cost of the item to ship back, we sell large items and shipping can be costly. 

    Returns/Cancellations after the item has shipped will also incur a 15-25% fee charged to you, as freight costs can be high for our products. 

    If your return is outside of the 30 day return period, your item will not be accepted.

    You can always contact us for any return questions at sales@buildthepower.com.

     

    Damages and issues

    Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item so that we can evaluate the issue and make it right.

    Items that are damaged must be communicated to us within 24 hours of receiving the item. 

    Please note that if items have been taken out of the packaging and/or installed, returns may be voided depending on the manufacturer. 

    Some of our manufacturers do not accept returns for specific items, this must be considered when purchasing. 


    Exchanges
    The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.

     

    Refunds
    We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

    Contact Information

    You can contact us using the methods below. 

    US Customer Support Number: +1 507 636 3614
    Email: sales@buildthepower.com


    Description
     

    Model S4B Outdoor Wood-Burning Hot Tub   

    The SaunaLife SOAK-Series Model S4 represents the very best in wood-burning hot tub quality, efficiency, and luxury.  

    Ready for your hot tub party  

    The Model S4B wood-fired hot tub arrives completely assembled and is easy to set up. Its ergonomically shaped fiberglass tub is a comfortable place for up to 6 people. The interior surface is easy to clean, and the exterior is crafted from thermally enhanced spruce for superior weather resistance and durability. 

    Engineered for efficiency and performance 

    Engineered and crafted in the Northers Europe, this super-efficient hot tub heats in 1/3 of the time as traditional wood-fired hot tubs. No electrical connection is required. At the heart of the Model S4 is its ingenious self-cleaning corrugated stove with a secondary chamber that transfers heat from the smoke – reducing wood consumption up to 50% compared with other hot tubs. Brilliantly, the air between the fiberglass lining and the wood exterior is super-heated to accelerate the heating process. The stove is cleverly engineered to draw cooler water through a lower channel and redistribute it though an upper channel to equalize the temperature.  

    Start enjoying sooner 

    This incredibly efficient wood stove will heat 304 gallons of water from 40°F (5°C) to 95°F (35°C) in 1.5 to 2 hours – the fastest-heating wood-burning hot tub available.  

    Relax with friends and family the luxury of your Model S4 backyard wood-burning hot tub from SaunaLife. 

    Features

      Model S4B Outdoor Wood-Burning Hot Tub   

      • 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 dark grey contoured fiberglass lining provides enhanced bather comfort 
      • 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 
      • Durable Thermo-Spruce tub surround (1.65” thick), painted black  
      • Superior thermal resistance (R-value) to retain heat  
      • Matching Thermo-Spruce wood steps for easy access 
      • 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 and 37” high  
      • Interior dimensions – 71" diameter and 33” deep 
      • Designed by SaunaLife and handcrafted in Northern Europe 

      Thermo-Spruce Material Advantages 

      • Lasts up to 2X longer than Cedar 
      • Superior thermal resistance (R-value) 
      • Eco-friendly 
      • Ideal for water use (stable)

      Includes

      Model S4B Outdoor Wood-Burning Hot Tub  

      • Fully assembled hot tub 
      • Steps 
      • Insulated cover  
      • Drainage with tap 
      • Polished stainless steel chimney 
      • Chimney cap 

      Specifications

      Model

      Model S4B

      Material

      Thermo-Spruce

      Interior Dimensions

      71" Diameter x 33"D

      Exterior Dimensons

      79" Diameter x 37"H

      Water Capacity

      304 Gallons

      Product Weight when 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

      106F

      Shipping Dimensions

      91"L x 46"W x 87"H

      Shipping Weight

      595 lbs

      Document Libary

      Model S4 Installation Manual
      Model S4 Diagram
      Warranty


      Shipping Information

      FREE & FAST SHIPPING SAVE Hundreds Today with Free Shipping on All Orders. We Ship to ALL 48 Lower States (We do not ship to Puerto Rico, Hawaii, Alaska)

      Lead Time - 3-7 Business Days De pending on Product
       - Once You Place an Order, We immediately begin processing, the order request is sent to our warehouse and is prepared for pickup, it then usually takes around 3-7 business days to be picked up for transit.

      Transit Time
       - Transit Time can vary depending on the distance between your location and the warehouse but you can expect the item to arrive between 3-8 business days after pickup.

      Our Shipping Partners: FedEx, UPS, Freight Club (among others)

      Shipping Partners
      We partner with the most reliable freight companies in the USA to ensure your order arrives safe and in a timely manner.

      Your Item will ship from warehouses all across the United States to ensure fast and efficient delivery times for our customers.

      If there are any delays regarding your product shipment, we will let you know in advance. 

      Order Confirmation:

      As soon as you place your order, you will receive an order confirmation e-mail. (please allow a few hours for this to come through in some cases) This means that we have received your order in our system and pre-authorized your credit card for the purchase. 

      As soon as we receive your order, we automatically reach out to our suppliers to confirm that it is in stock and available for immediate shipment. 

      If your item is on backorder or unavailable, we will void the pre-authorization and reach out to you via e-mail.  If your item(s) are available for immediate shipment (within 5 business days), we will process the charges and submit the order for shipment.

      Order Shipment:

      If your order is in stock and we process the charges to your credit card, it will ship within five business days from the date of your order.  We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out.  If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at sales@buildthepower.com

      No Shipping outside the USA. (Some exceptions apply - if the website permits you to check out and enter your shipping address, you will receive your order. Some products in particular are available in Canada).

      Shipping Options

      Our base "Curb-side" Pickup shipping is always completely free! This option usually takes between 5-15 days to arrive at your doorstep, after you have submitted your order.

      Threshold Shipping: This involves the item being brought onto your porch, or into a sheltered/garage area. 

      Double-Check Your Address

      To ensure that your package is properly delivered and that you receive your package within the time frames we advertise, please
      make sure that your address is correctly entered and includes all relevant and/or required information. The use of correct
      abbreviations, street numbers, building or apartment numbers, and route information (if applicable) is critical for ensuring
      timely delivery. 
      We do not take responsibility for lost, misplaced, or incorrectly delivered shipments if the address information
      provided is incorrect or incorrectly entered at the time of purchase
      .

      Damages

      Please inspect the packaging of your item(s) when they arrive, if you notice any damage, you should make note of it when signing for delivery.  If your item(s) do arrived damaged please send photos of damage, box and SKU, along with a brief description of the damage to sales@buildthepower.com and we will process an insurance claim on your behalf. Photos and videos must be sent for freight damage within 24 hours of arrival or the freight damage claim will not be valid. Any punctures, or visible signs of exterior damage must be reported within 24 hours.

      Warranty

      10 Years

      Return Information

      We have a 30-day return policy, which means you have 30 days after receiving your item to request a return.

      Should you decide to cancel your order prior to its shipment, a 3% deduction will be applied to cover platform fee expenses from the total paid amount.

      To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need the receipt or proof of purchase. Items that are not in this condition will not be accepted.

      To start a return, you can contact us at sales@buildthepower.com If your return is accepted, we'll send you a return shipping label, as well as instructions on how and where to send your package. Items sent back to us without first requesting a return will not be accepted.

      Returns for reasons other than damaged items will require a 15-25% re-stocking fee, this depends on the size and freight cost of the item to ship back, we sell large items and shipping can be costly. 

      Returns/Cancellations after the item has shipped will also incur a 15-25% fee charged to you, as freight costs can be high for our products. 

      If your return is outside of the 30 day return period, your item will not be accepted.

      You can always contact us for any return questions at sales@buildthepower.com.

       

      Damages and issues

      Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item so that we can evaluate the issue and make it right.

      Items that are damaged must be communicated to us within 24 hours of receiving the item. 

      Please note that if items have been taken out of the packaging and/or installed, returns may be voided depending on the manufacturer. 

      Some of our manufacturers do not accept returns for specific items, this must be considered when purchasing. 


      Exchanges
      The fastest way to ensure you get what you want is to return the item you have, and once the return is accepted, make a separate purchase for the new item.

       

      Refunds
      We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, you’ll be automatically refunded on your original payment method. Please remember it can take some time for your bank or credit card company to process and post the refund too.

      Contact Information

      You can contact us using the methods below. 

      US Customer Support Number: +1 507 636 3614
      Email: sales@buildthepower.com


      what’s included
       

      The E2000LFP Expandable Power Station combines power and flexibility in a portable package. Link it with two EB3000 battery packs to reach an impressive 8064Wh capacity - enough for almost any power need.

      With 2000W AC output, it runs most household devices and tools without breaking a sweat. The advanced LiFePo4 batteries deliver outstanding durability, keeping 80% capacity even after 3500 charging cycles.

      Charging is quick and flexible. The station accepts up to 1300W input across multiple ports, with 600W maximum solar input. Using solar panels, you'll fully charge in 2-3 hours. Need it faster? Dual AC adapters cut that time to just 1.5-2 hours.

      Specification
       

      The E2000LFP Expandable Power Station combines power and flexibility in a portable package. Link it with two EB3000 battery packs to reach an impressive 8064Wh capacity - enough for almost any power need.

      With 2000W AC output, it runs most household devices and tools without breaking a sweat. The advanced LiFePo4 batteries deliver outstanding durability, keeping 80% capacity even after 3500 charging cycles.

      Charging is quick and flexible. The station accepts up to 1300W input across multiple ports, with 600W maximum solar input. Using solar panels, you'll fully charge in 2-3 hours. Need it faster? Dual AC adapters cut that time to just 1.5-2 hours.

      Shipping & Delivery
       

      The E2000LFP Expandable Power Station combines power and flexibility in a portable package. Link it with two EB3000 battery packs to reach an impressive 8064Wh capacity - enough for almost any power need.

      With 2000W AC output, it runs most household devices and tools without breaking a sweat. The advanced LiFePo4 batteries deliver outstanding durability, keeping 80% capacity even after 3500 charging cycles.

      Charging is quick and flexible. The station accepts up to 1300W input across multiple ports, with 600W maximum solar input. Using solar panels, you'll fully charge in 2-3 hours. Need it faster? Dual AC adapters cut that time to just 1.5-2 hours.

      Add To Cart

      Top Solar and Generator Brands

      Free U.S. Shipping

      30-Day Returns

      Expert Support Team

      Get Started In 3 Simple Steps

      The whole process is easy – no salespeople involved.

      Step 1: Choose Your System

      Pick your products at direct-to-you prices. Browse complete systems and see exactly what you'll pay.

      Step 2: Place Your Order

      Quick online checkout with free U.S. shipping. Your order ships within 3-5 business days.

      Step 3: Power Up

      Professional guidance for setup and connection. Our team helps you get the most from your power station.

      The Build The Power Difference

      Here’s why you’ll prefer us over other providers.

      OTHER PROVIDERS
      Straightforward Online Pricing
      No Pushy Sales Tactics
      Expert Technical Support
      24/7 Digital Ordering
      Clear Installation Steps
      No Hidden Costs or Fees

      What Our Customers Say

      Direct experiences from homeowners who took control of their energy costs.

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      - John S.

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      - John S.

      Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur

      - John S.

      Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur

      - John S.

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      - John S.

      Frequently Asked Questions

      How is Build The Power different from other companies?
       

      Unlike traditional companies, we've removed the complex network of salespeople, project managers, and dealer fees. You browse and buy directly through our digital platform, cutting costs by 20-50% while still getting expert support when you need it.

      How does your ordering process work?
       

      Browse & Select – Find the product that suits your needs.Add to Cart – Click "Add to Cart" and proceed to checkout. Secure Payment – Complete your purchase using our secure payment options. Order Confirmation – You’ll receive an email confirmation with your order details. Shipping & Delivery – We process and ship your order as quickly as possible. A tracking number will be provided. If you have any questions, feel free to contact us!

      Do you offer free shipping?
       

      Yes! We offer free shipping on all orders, with no minimum purchase required. Enjoy hassle-free shopping without worrying about extra shipping costs. Once your order is processed, we’ll provide a tracking number so you can follow your shipment’s progress.

      What's your return policy?
       

      We offer a 30-day return policy for your peace of mind. If you're not completely satisfied with your purchase, you can return it within 30 days of delivery for a refund or exchange. The item must be in its original condition and packaging.

      To start a return, contact our support team, and we’ll guide you through the process.

      Can I get help with installation?
       

      We do not offer installation services, but we’re happy to recommend trusted companies or services that can assist you. If you need help finding an installer, feel free to contact us, and we’ll point you in the right direction!

      Top Solar and Generator Brands

      Free U.S. Shipping

      30-Day Returns

      Expert Support Team

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