SaunaLife S4B – 4–6 Person Wood-Fired Hot Tub, Black

The SaunaLife S4B – 4–6 Person Wood-Fired Hot Tub in Black Thermo-Pine is designed for immersive outdoor relaxation rooted in traditional craftsmanship and modern efficiency. Built for shared soaking experiences, this hot tub comfortably accommodates four to six people, making it well suited for family use, social gatherings, or wellness-focused outdoor spaces.

Crafted from thermally modified pine with a refined black exterior, the S4B offers enhanced durability and natural resistance to moisture and weather exposure. Its wood-fired heating system provides an authentic soaking experience while allowing users to heat the water naturally without reliance on electrical components. The spacious interior is designed for comfortable seating and extended soak sessions.

Delivered in a prefabricated format, the S4B is intended for outdoor installation and integrates seamlessly into backyard, retreat, or spa environments. Inside, a smooth fiberglass liner creates a durable, easy-to-maintain surface that supports long-term use and simplifies cleaning.

With its combination of traditional wood-fired heating, quality materials, and thoughtful design, the SaunaLife S4B offers a reliable and timeless hot tub experience for those seeking a refined outdoor wellness addition.

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)  

Model S4B Outdoor Wood-Burning Hot Tub  

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

To make setup and operation effortless, SaunaLife provides detailed guides to help you get started confidently.

Included Resources:

• Model S4 Installation Manual – Step-by-step setup and usage instructions for optimal safety and performance.

• Model S4 Diagram – Detailed visual reference for understanding assembly, operation, and maintenance components.

Each file is available for download directly from the product page. Review both documents before installation to ensure safe operation and longevity of your SaunaLife hot tub.

Embrace the beauty of simplicity and performance—relax, unwind, and live the SaunaLife.

At My Energy Flow, we’re committed to delivering your order with the same care and precision that goes into every product we offer. Our shipping process is designed to be seamless, reliable, and worry-free — giving you full confidence from dispatch to delivery.

📦 Shipping Policy

• Processing Time: Orders are processed within 1–3 business days.
• Shipping Method & Delivery Times: Your product will be delivered by freight (curbside delivery) within 5–7 business days. Please note that deliveries to remote or rural areas may take longer depending on carrier availability and could be subject to additional charges.
• Freight Delivery: For larger items, our carrier partners will reach out directly to schedule your delivery at a convenient time. We recommend confirming promptly to ensure a smooth experience and avoid any unnecessary storage fees.
• Tracking Details: You’ll receive an order acknowledgment by email once your order is placed, followed by shipping updates and delivery details from our team or supplier.
• Upon Delivery: We kindly ask that you inspect all items carefully. In the event you discover any damages notify us at support@myenergyflow.com immediately so we can assist promptly. 

Your peace of mind is as important as your wellness journey. That’s why every product is supported by a carefully defined return and warranty policy — giving you confidence and clarity with every purchase.

🔄 Refund & Return Policy

• Return Window: You may request a return within 30 days of delivery, provided the item is unused, in original packaging, and in re-sellable condition.
• Return Requirements: To help us maintain the highest level of service, all approved returns are subject to a 20% restocking fee. Return shipping costs are the responsibility of the customer, and original or expedited shipping charges are non-refundable.
• How to Start a Return: Email support@myenergyflow.com with your order number, reason for return, and any relevant photos. Once approved, returns must be shipped back within 7 days of authorization.

🛡️ Warranty

• Manufacturer's Warranty: Your purchase is backed by SaunaLife’s limited lifetime warranty for residential use, covering the sauna’s structure and components against defects in workmanship.
• Exclusions: Warranty does not cover damage resulting from misuse, improper installation, accidents, unauthorized modifications, or use beyond recommended specifications.
• Support & Claims: To initiate a warranty claim, please email support@myenergyflow.com with your order number, a description of the issue, and relevant photos or videos. 

Thank you for choosing My Energy Flow. Your confidence, comfort, and wellness are at the heart of everything we do — and we’re here to support you at every step of your journey. More than a purchase, your order is the beginning of a trusted relationship, and our team is always ready to provide clarity, care, and guidance whenever you need it.