SaunaLife Model S4B – Outdoor Wood-Burning Hot Tub (Thermo-Spruce)
Important Notice: This product is not eligible for White Glove Delivery or Installation Service.
Luxury Outdoor Wood-Fired Hot Tub – No Electricity Needed
The SaunaLife Model S4B is a handcrafted outdoor hot tub powered entirely by wood, designed for those seeking an eco-friendly, off-grid luxury spa experience. Crafted in Northern Europe from long-lasting Thermo-Spruce and fitted with a premium fiberglass lining, this hot tub delivers superior heat retention, comfort, and rustic charm.
Key Features
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Thermo-Spruce Build: Lasts up to 2x longer than Cedar with superior thermal resistance (R-value)
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Eco-Friendly: Requires no electricity—ideal for off-grid or remote use
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Fully Assembled: Ships ready to use, no construction or wiring needed
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Rapid Heat-Up: Stainless steel wood-burning heater warms water in under 2 hours
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Spacious Design: Comfortably fits up to 6 bathers with over 304 gallons of water
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Thick Fiberglass Lining: Contoured dark grey interior for maximum comfort and easy cleaning
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Reinforced Foam Cover: Extra thick, folding insulated cover with marine-grade vinyl exterior
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Stainless Steel Chimney: Polished with heat protection and cap included
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Integrated Drain Tap: Easy water drainage and maintenance
What’s Included
- SaunaLife Model S4B Wood-Burning Hot Tub (fully assembled)
- Matching Thermo-Spruce steps
- 304 stainless steel wood-burning heater
- Polished stainless steel chimney & chimney cap
- Insulated foam cover with marine-grade vinyl exterior
- Drainage system with tap
Specifications
| Exterior Dimensions |
79" diameter × 37" high |
| Interior Dimensions |
71" diameter × 33" deep |
| Capacity |
Up to 6 people |
| Water Volume |
304+ gallons |
| Material |
Thermo-Spruce with fiberglass interior lining |
| Heater |
304 Stainless Steel Wood-Burning |
| Cover |
Steel-reinforced, insulated foam with marine vinyl exterior |
| Weight |
Approx. 450 lbs (empty) |
| Country of Origin |
Northern Europe |
Why Choose Thermo-Spruce?
- Environmentally friendly and sustainably sourced
- Lasts 2x longer than untreated Cedar
- Superior heat resistance and energy retention
- Naturally stable and ideal for water applications
Perfect For:
- Off-grid cabins and wilderness retreats
- Luxury backyard spa setups
- Vacation homes and rentals
- Sauna and hot/cold contrast bathing rituals
Shipping & Returns
- White-glove shipping available in most U.S. regions
- Ships fully assembled and ready to use
- 14-day return policy on unused products
Dimensions Diagram
Warranty
