SaunaLife Model S4 Soak Series 6 Person Wood-Fired Hot Tub
SaunaLife S4 Soak Series 6 Person Wood-Fired Hot Tub - Fully Assembled
A Luxurious, Eco-Friendly Outdoor Hot Tub with Unmatched Efficiency

Experience the ultimate in outdoor relaxation with the SaunaLife S4 Wood-Fired Hot Tub. Designed for efficiency, comfort, and durability, this fully assembled hot tub provides a spacious, ergonomic soaking experience for up to 6 bathers.
Unlike traditional hot tubs, the S4 requires no electricity, making it an eco-friendly and cost-effective option for those seeking a pure, off-grid soaking experience. Engineered in Northern Europe, the S4’s advanced wood-burning heating system heats 304 gallons of water in just 1.5 to 2 hours, which is three times faster than traditional wood-fired hot tubs.
Its innovative dual-chamber stove design reduces wood consumption by up to 50%, while the air-heated insulation system ensures optimal heat retention. Built with 1.65” thick Thermo-Spruce, the S4’s exterior lasts twice as long as Cedar, offering superior weather resistance and durability.
Inside, the dark grey fiberglass lining provides a smooth, contoured surface for maximum comfort and easy maintenance. Complete with matching wooden steps, an insulated foam cover, and a stainless steel chimney, the S4 is a premium, low-maintenance hot tub built for long-lasting enjoyment.
Soak-Series Model S4 Features
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1.65” Thick Thermo-Spruce Exterior
- Lasts up to 2X longer than Cedar for superior outdoor durability.
- Naturally resistant to weather, moisture, and decay.
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304 Stainless Steel Wood-Burning Heater
- Dual heat compartments for 50% more efficiency.
- Self-cleaning corrugated stove reduces wood consumption.
- Polished Stainless Steel Chimney with Protection Cap: Prevents heat loss and enhances heating efficiency.
- Heats Water in Just 1.5 - 2 Hours: Warms 304 gallons from 40°F to 95°F in record time.
- Eco-Friendly, No Electricity Required: Off-grid hot tub solution – perfect for cabins, retreats, and backyards.
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Innovative Heat Circulation System
- Super-heated air between the fiberglass lining and wood exterior accelerates heating.
- Cooler water is drawn through a lower channel and redistributed through an upper channel for even temperature distribution.
- Seats Up to 6 People: Perfect for social gatherings, family relaxation, or solo retreats.
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Dark Grey Contoured Fiberglass Lining
- Ergonomically shaped for superior bather comfort.
- Easy to clean, non-porous surface for low maintenance.
- Matching Thermo-Spruce Steps for Easy Access: Provides safe and convenient entry into the hot tub.
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Extra Thick, Steel-Reinforced Foam Insulated Cover
- Folds for easy removal and storage.
- Dark grey marine-grade vinyl exterior for durability.
- Integrated Hot Tub Drainage Tap: Allows for easy water management and cleaning.
Model S4 Wood-Fired Hot Tub Specifications
- Capacity: Up to 6 bathers
- Exterior Dimensions: 79” Diameter x 37” H
- Interior Dimensions: 71” Diameter x 33” Deep
- Weight: 595 lbs
- Water Capacity: 304 Gallons
- Material: Thermo-Spruce Exterior, Fiberglass Interior
- Heating System: 304 Stainless Steel Wood-Burning Stove
- Chimney: Polished Stainless Steel with Protective Cap
What’s Included?
- Luxury Thermo-Spruce Hot Tub (Fully Assembled & Ready to Use)
- 304 Stainless Steel Wood-Burning Heater
- Polished Stainless Steel Chimney with Cap
- Ergonomic Dark Grey Fiberglass Lining
- Matching Thermo-Spruce Wooden Steps
- Extra Thick, Insulated Foam Cover (Steel Reinforced, Foldable)
- Integrated Drainage Tap for Easy Water Management
Downloads:

Elevate Your Backyard with the SaunaLife S4 – A Fully Assembled, Eco-Friendly, & Fast-Heating Wood-Fired Hot Tub for the Ultimate Relaxation Experience!
Order Processing: Once your order is placed, you’ll receive a confirmation email. Please allow 1–3 business days for order review and processing. If we need to confirm delivery details or there are any delays, we’ll reach out right away.
How Saunas Ship:
- Freight Delivery (Most Saunas): Sauna kits and larger models ship on a pallet via freight carrier and are delivered curbside.
- Parcel Shipping (Smaller Items): Accessories or small components may ship via UPS, FedEx, or USPS.
Estimated Delivery Timeline:
- Processing: 1–3 business days.
- Estimated Ship-Out: Typically ships in 1–2 weeks.
- Transit Time: Freight shipments typically take 3–10 business days once shipped.
- Delivery Appointment: The carrier will usually contact you to schedule delivery. An adult must be present to receive and inspect the shipment.
Important Delivery Notes:
- Curbside Delivery: Freight is delivered to the end of your driveway or loading area. Inside delivery or white-glove service is not included unless arranged in advance.
- Measure First: Confirm doorway widths, staircases, and access paths. Sauna kits ship in multiple boxes and/or pallets.
- Inspect on Arrival: Before signing, check for visible damage to packaging or pallet.
If There’s Damage: Note it on the delivery receipt (ex: “Damaged – subject to inspection”), take photos, and contact us within 48 hours so we can assist with next steps.
Warranty Coverage:
We are an authorized dealer, and all saunas include the full manufacturer’s warranty. Coverage terms vary by brand and model and are listed on the product page.
What’s Typically Covered:
- Manufacturer defects in sauna materials and components
- Heaters, controls, and electrical components per manufacturer policy
- Replacement parts shipped to you (labor not typically included)
What’s Typically Not Covered:
- Shipping damage not noted at delivery
- Natural wood variation, knots, or movement over time
- Improper installation, misuse, or operation outside manufacturer guidelines
- Electrical issues due to incorrect wiring or inadequate power supply
Need Help? If you have questions or need to start a warranty claim, contact us and we’ll help coordinate with the manufacturer to get things resolved as quickly as possible.
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