SaunaLife Model S4B – Outdoor Wood-Burning Hot Tub

Turn your backyard into a retreat with the SaunaLife Model S4B ‒ a masterfully handcrafted hot tub built for elegance, power, and pure relaxation. Designed with eco-friendly artistry, this tub invites you to soak, unwind, and enjoy moments of truly restorative luxury.

Features & Highlights

• Crafted from Thermo-Spruce, a material that delivers superior weather resistance and durability, lasting up to twice as long as cedar.

• Fully assembled and ready out of the box with no electricity required, making it perfect for off-grid settings or serene backyard sanctuaries.

• Heats over 304 gallons of water efficiently using its stainless steel, dual-chamber wood-burning heater. Built to deliver ideal bathing temperatures within 1.5 to 2 hours.

• Fiberglass interior lining in dark grey, contoured for comfort and easy to clean; thick, ergonomic design for six bathers.

• Premium accessories included: insulated cover, Thermo-Spruce steps, steel-reinforced, foam-insulated flip cover with marine-grade vinyl exterior, polished stainless steel chimney, and integrated drainage tap.

Specifications

• Capacity: Up to 6 people

• Water Volume: ~304 gallons

• Exterior Dimensions: 79″ diameter × 37″ height

• Interior Dimensions: 71″ diameter × 33″ depth

• Material: Thermo-Spruce (exterior) & Fiberglass (interior lining)

• Heater: 304 stainless steel wood-burning heater with dual-chamber design (uses wood up to ~16″ length)

• Maximum Water Temp: ~106°F

• Stove & Chimney Dimensions: Stove approx. 19.8″ L × 11.8″ W × 13.1″ H; Chimney approximately 95″ height × 4.7″ diameter

• Shipping Weight & Package Size: Approx. 595 lbs; large freight box (~91″ × 46″ × 87″)

Why Model S4B Stands Out

This tub isn’t just about the soak—it’s about the full experience. From the cold plunge contrast routines to soirées under the stars, the S4B delivers both performance and presence. The high-efficiency heater saves wood and time; the well-insulated build retains heat beautifully; the thoughtful finishes give a high-end feel. For those seeking wellness, connection, and immersive relaxation, this tub offers more than just water—it offers an elevated ritual.