SaunaLife Model S4N Soak-Series Home Wood-Burning Hot Tub, Natural
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This item has limited availability — order now before it’s gone.
Important Notice: This product is not eligible for White Glove Delivery or Installation Service.
Shipping Information: This hot tub ships fully assembled via freight delivery. Additional delivery fees may apply depending on your location and access conditions.
Shipping Information: This hot tub ships fully assembled via freight delivery. Additional delivery fees may apply depending on your location and access conditions.
Freight Shipping:
This item ships via freight. A flat-rate shipping cost of $950 will be added at checkout.
This item ships via freight. A flat-rate shipping cost of $950 will be added at checkout.
Experience authentic Nordic bathing with the SaunaLife Model S4N Wood-Burning Hot Tub. Built from thermo-spruce wood with a fiberglass interior, this fully assembled hot tub is designed for durability, performance, and beauty. Featuring a powerful 304 stainless steel wood-burning heater, polished stainless steel chimney, and insulated marine-grade cover, the S4N delivers the ultimate outdoor spa experience with minimal maintenance. Perfect for backyards, cabins, and off-grid retreats.
Features
- Constructed from thermo-spruce wood with fiberglass interior
- 304 stainless steel wood-burning heater for long-lasting performance
- Polished stainless steel chimney with rain cap
- Integrated thermo-spruce steps for safe entry
- Insulated marine-grade vinyl cover for heat retention and protection
- Built-in drainage system with tap for easy maintenance
- Eco-friendly thermo-spruce—lasts 2X longer than cedar and retains heat better
- Ships fully assembled for easy installation
Includes
- SaunaLife Model S4N Hot Tub (fully assembled)
- 304 Stainless Steel Wood-Burning Heater
- Thermo-Spruce Steps
- Polished Stainless Steel Chimney with Cap
- Insulated Marine-Grade Vinyl Cover
- Integrated Drainage System with Tap
- Installation & Operation Manual
Specifications
| Specification | Details |
|---|---|
| Exterior Dimensions | 79" diameter × 37" high |
| Interior Dimensions | 71" diameter × 33" deep |
| Water Capacity | 304+ gallons |
| Seating Capacity | Up to 6 bathers |
| Construction | Thermo-Spruce wood with fiberglass interior |
| Heater Material | 304 Stainless Steel |
| Cover | Insulated foam with dark grey marine-grade vinyl |
| Country of Origin | Northern Europe |
Why Choose Thermo-Spruce?
- Eco-friendly and chemical-free
- Lasts up to 2X longer than cedar
- Superior heat retention (R-value)
- Stable and long-lasting—ideal for water-contact applications
Perfect For
- Remote cabins and off-grid homes
- Backyard hot tub upgrades
- Luxury outdoor spas
- Cold-weather bathing and relaxation
Compare at a Glance
| Feature | S4N Wood-Burning (This Page) | Typical 240V Electric Spa (see our electric models) |
|---|---|---|
| Power Source | Wood-fired (no electricity needed) | Electric (typically 240V / 50A) |
| Heat-Up Time | ~1.5–2 hours (fuel & ambient dependent) | ~30–90 minutes (heater wattage dependent) |
| Controls & Jets | Manual fire management; no electric jets | Digital controls, pumps, hydrotherapy jets |
| Best For | Off-grid, low-tech ritual, ambiance | Set-and-forget convenience, hydro massage |
| Ongoing Cost | Firewood (see estimates below) | Electricity (kWh) + chemicals |
Note: The S4N is a wood-fired soaking tub—massage jets and powered accessories are not included by design.
Site Prep & Installation
- Foundation: Level, non-combustible, load-rated base (concrete pad or pavers). Keep clear of eaves/overhangs.
- Clearances: Follow local codes for chimney location and setbacks. Keep combustibles away from heater and flue.
- Water Supply: Fill with a standard garden hose. Use integrated drain for water changes.
- Ventilation: Outdoor use only; ensure adequate airflow around the heater and flue.
- Local Codes: Check municipal rules for solid-fuel outdoor appliances before installation.
Operating Guide (Heat-Up & Fuel)
- Fuel: Use seasoned hardwood (oak, maple, birch) for hotter, cleaner burns; avoid softwoods/treated wood.
- Heat-Up: Typically 1.5–2 hours to 100–104°F depending on weather, starting water temp, and wood quality.
- Circulation: Stir water periodically with a clean paddle for even temperature during heating.
- After Use: Replace and latch cover to retain heat and keep debris out.
Estimated Running Costs
Costs vary by climate, season, and wood prices.
| Item | Typical Range | Notes |
|---|---|---|
| Firewood per session | ~0.25–0.5 cubic ft | Ambient temp & wood species affect burn rate |
| Approx. fuel cost | ~$2–$6 per heat-up | Based on typical U.S. cord/box pricing |
| Water care | $5–$12/month | Cover + periodic treatment reduces upkeep |
Shipping & Delivery
- Freight delivery with appointment; ships fully assembled.
- Limited availability: Order promptly to secure inventory.
- Typical freight transit after processing: 7–14 business days (location dependent).
Need a specific date or access accommodations? Contact us before checkout.
FAQs
Does the S4N need electricity?
No—it's fully wood-fired. No pumps, blowers, or powered jets are included.
How long does it take to heat?
Typically 1.5–2 hours to 100–104°F depending on weather, starting water temp, and wood quality.
Can I place it on a deck?
Yes—if the structure is rated for the filled weight (tub + 304+ gallons + occupants) and local fire codes are met. Non-combustible base recommended.
How do I keep the water clean?
Use the insulated cover consistently and refresh/maintain water per your preferred treatment program.
Pro Tip: Always cover your hot tub with the insulated vinyl cover when not in use to retain heat, reduce debris, and extend the lifespan of your water and wood construction.
Why Buy From Us
Authorized Dealer
Direct relationships with every brand we carry.
Full Manufacturer Warranty
Registered coverage on every purchase.
Free Shipping + White-Glove Options
Delivered safely; setup options available at checkout.
Veteran-Owned & U.S.-Based Support
Personalized help before, during, and after your order.
FAQs
Shipping & Delivery
Free curbside shipping on all orders. White-glove delivery/setup available at checkout 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.
