SaunaLife Model S4B Soak-Series Home Wood-Burning Hot Tub, Black
Regular price$5,990.00
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Availability: Lead times can vary by season. Contact us for current ETA before ordering.
Delivery Method: Ships fully assembled via freight with curbside delivery. White-glove placement is not available for this model.
Shipping: Flat-rate $950 at checkout. Additional fees may apply for difficult access (gates, steep grades, long driveways). Carrier will schedule a delivery window.
Not sure if the S4B is right for your space?
We can help you confirm site prep, clearances, and best practices for a safe wood-fired setup before you order.
Authorized SaunaLife dealer • Manufacturer warranty • Nationwide freight delivery
The SaunaLife Model S4B is a premium wood-burning outdoor hot tub designed for an authentic, off-grid soaking experience. It pairs a durable Thermo-Spruce exterior (painted black) with an ergonomic, easy-clean fiberglass interior and a high-efficiency 304 stainless steel wood-burning heater—no electrical hookup required.
Who This Is For (And Who It’s Not For)
Best For
- Buyers who want a true wood-fired soak with no electrical hookup required
- Backyard wellness spaces, cabins, and off-grid properties
- Anyone who prefers simple soaking (no powered jets or pumps)
- People who want a premium tub that arrives fully assembled
Not Ideal If
- You want powered jets, pumps, or digital controls
- You need white glove placement/installation included
- You want “set-and-forget” electric spa convenience
- You cannot meet local solid-fuel clearance or code requirements
Key Features
- Off-Grid Simplicity: Wood-burning heater; no electrical connection required.
- Black Thermo-Spruce Exterior: Thermally modified spruce surround painted black for a bold, modern look.
- Ergonomic Fiberglass Interior: Contoured and easy to clean.
- 304 Stainless Wood-Fired Heater: Engineered for fast, efficient heating.
- Polished Stainless Chimney: Includes a protective cap.
- Matching Steps: Thermo-Spruce entry steps included.
- Insulated Cover: Helps retain heat and keep out debris (marine-grade vinyl exterior).
- Integrated Drain Tap: Simplifies draining for water changes and maintenance.
- Ships Fully Assembled: Place on a prepared, level base.
Specifications
| Category | Details |
|---|---|
| Model | SaunaLife S4B Wood-Burning Hot Tub |
| Seating Capacity | Up to 6 adults |
| Water Capacity | 304 gallons |
| Exterior Dimensions | 79" (Ø) × 37" (H) |
| Interior Dimensions | 71" (Ø) × 33" (D) |
| Exterior Material | Thermo-Spruce (thermally modified spruce), painted black |
| Interior Material | Contoured fiberglass shell (dark grey) |
| Heater Type | Wood-burning; no electrical connection required |
| Heater Material | 304 stainless steel |
| Stove Dimensions | 19.8" L × 11.8" W × 13.1" H |
| Chimney | Polished stainless chimney with protective cap (approx. 95" H × 4.7" diameter) |
| Cover | Insulated foam core with marine-grade vinyl exterior (dark grey) |
| Steps | Matching Thermo-Spruce steps included |
| Drain System | Integrated drainage tap |
| Maximum Wood Length | Up to 16" |
| Maximum Temperature | Up to 106°F |
| Typical Heat-Up Time | Approx. 1.5–2 hours to ~95°F from ~40°F (conditions vary) |
| Product Weight (filled) | Approx. 3,064 lb |
| Shipping Dimensions | 91" L × 46" W × 87" H |
| Shipping Weight | Approx. 595 lb |
| Use Environment | Outdoor use only |
| Country of Origin | Handcrafted in Northern Europe |
| Warranty | Manufacturer’s limited warranty via SaunaLife |
What’s Included
- S4B hot tub (fully assembled)
- 304 stainless wood-burning heater
- Polished stainless chimney + protective cap
- Matching Thermo-Spruce steps
- Insulated cover (marine-grade vinyl exterior)
- Integrated drain tap
- User manual & care guide
What You May Need (Typical Setup)
| Item | Why It Matters |
|---|---|
| Level, load-rated base | Concrete or pavers are common. Ensure the surface can support the filled tub + occupants. |
| Water fill access | Standard garden hose fill. |
| Drain plan | Use the integrated drain tap and route water appropriately for your property. |
| Firewood storage | Seasoned hardwood burns hotter and cleaner than wet wood. |
| Local code check | Solid-fuel appliance rules can vary. Confirm clearances and setbacks before installation. |
Compare at a Glance
| Feature | S4B Wood-Fired (This Page) | Typical 240V Electric Spa |
|---|---|---|
| Power Source | Wood-burning; no electricity | Electric (varies by spa) |
| Heat-Up | Approx. 1.5–2 hours* | Varies widely by spa + heater |
| Jets & Controls | No powered jets; manual fire control | Digital controls, pumps, hydrotherapy jets |
| Best For | Off-grid ritual, ambiance, simple soaking | Convenience, massage therapy features |
| Ongoing Cost | Firewood + water care | Electricity + water care |
*Varies by season, starting water temperature, wood type, wind, and use of the insulated cover.
Site Prep & Installation
- Base: Level, non-combustible, load-rated pad (concrete/pavers). Keep clear of eaves/overhangs.
- Clearances: Follow local chimney height and setback rules; keep combustibles away from the heater and flue.
- Water: Fill via standard garden hose; drain using the integrated tap.
- Ventilation: Outdoor use only with open air around heater and chimney.
- Local Codes: Verify solid-fuel appliance requirements before installation.
Operating Guide
- Fuel: Use seasoned hardwood for hotter, cleaner burns; avoid treated lumber.
- Heating: Approx. 1.5–2 hours to ~95°F from ~40°F in typical conditions; keep cover on while heating when possible.
- Even Temp: Stir water during heat-up for more even temperature distribution.
- After Use: Replace and latch cover to help retain heat and keep out debris.
Shipping & Returns
- Flat-rate freight: $950 at checkout (contiguous U.S.).
- Ships fully assembled via freight with appointment scheduling.
- Curbside delivery only. Customer is responsible for moving the unit from the drop point to the final location.
- Returns: 14-day return policy on unused products (see full terms).
Need a specific date or special access accommodations? Contact us before checkout.
FAQs
Does the S4B need electricity?
No. It’s wood-fired and does not require an electrical connection for heating.
How long does it take to heat?
Approximately 1.5–2 hours to ~95°F from ~40°F in typical conditions. Timing varies with weather, starting water temperature, wood quality, wind, and cover use during heating.
Can I place it on a deck?
Possibly—confirm the structure is rated for the filled weight (tub + water + occupants) and follow local solid-fuel clearance rules.
Is there built-in filtration?
This is a soaking tub without powered filtration. Use the cover consistently and maintain water per your preferred treatment program.
Pro Tip: Keep your firewood dry and covered. Seasoned wood heats faster and burns cleaner, and using the insulated cover during warmup can reduce heat loss.
Warranty & Support
MyLuxuryHomeSpa.com is an Authorized SaunaLife Dealer. All purchases are supported by SaunaLife’s manufacturer warranty and our expert customer service.
Installation Manual (PDF) • Dimensions Diagram (PDF) • Warranty (PDF)
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FAQs
Shipping & Delivery
Free shipping available on select orders. White-glove delivery and setup can be arranged at an additional cost in most areas. We'll confirm your preferred date after purchase.
Warranty
Full manufacturer warranty, registered at purchase. Need help with a claim? Our U.S. support team handles it directly with the brand.
Returns
New, uninstalled items can be returned within the brand's policy window. We'll help coordinate pickup and any restocking requirements.
Installation & Power
Most saunas/hot tubs require dedicated circuits. We provide spec sheets and can recommend licensed installers in your area.
