SaunaLife S4 Wood-Fired Hot Tub — Fast-Heating, 6-Person Outdoor Luxury

Efficient Wood-Burning Performance

Meet the SaunaLife S4, the wood-fired hot tub engineered to heat ~304 gallons from 40°F to ~95°F in about 1.5–2 hours—without electricity. Its self-cleaning corrugated stove features a secondary heat chamber to reclaim heat from exhaust, reducing wood consumption and speeding warm-up. An air gap between the fiberglass liner and Thermo-Spruce surround is super-heated to accelerate heating, while internal channels circulate water for even temperature.

Scandinavian Craft & Durability

Handcrafted in Northern Europe, the S4 combines a 1.65" Thermo-Spruce exterior (painted black) with a thick, contoured dark-grey fiberglass interior for lasting comfort and strength. A 304 stainless steel stove and polished chimney handle heat and weather with ease. The surface is easy to clean and built for year-round enjoyment.

Party-Ready, Delivered Assembled

Arrives fully assembled with matching Thermo-Spruce steps, an extra-thick insulated cover (steel-reinforced foam, marine-grade vinyl exterior), and a built-in drain tap for simple maintenance. Just position, add water, light the fire—and unwind.

Product Specs

Built for Speed, Comfort & Longevity

• Rapid heat-up: ~1.5–2 hrs to ~95°F (from ~40°F), no power required

• High-efficiency wood stove: self-cleaning corrugated design with secondary heat chamber

• Even heating: engineered lower-to-upper water channels equalize temperature

• Premium materials: Thermo-Spruce surround (≈1.65") lasts up to 2× longer than cedar

• Comfort interior: thick, contoured fiberglass tub (easy-clean surface)

• Stainless build: 304 SS wood-burning heater + polished SS chimney & cap

• Heat retention: superior thermal resistance (R-value) + insulated foldable cover

• Arrives assembled: includes steps, drain tap, and chimney protection

• Capacity: up to 6 bathers

Naturally Relaxing Hydro-Thermal Therapy

• Muscle relief & recovery — warmth helps loosen tight muscles and joints

• Circulation boost — heat promotes blood flow for a soothing, whole-body calm

• Stress reduction — warm-water immersion supports parasympathetic relaxation

• Better sleep — post-soak cooldown can encourage deeper rest

• Mindfulness time — a screen-free ritual for family and friends
  (General wellness information; not medical advice.)

What’s in the Box

• Fully assembled hot tub

• 304 SS wood-burning heater (dual-chamber, corrugated)

• Polished stainless chimney + chimney cap

• Matching Thermo-Spruce steps

• Extra-thick, steel-reinforced foam insulated cover (dark-grey marine vinyl exterior)

• Integrated drain tap

• Basic setup & care guide

Why Buy From Us

✅ Free Shipping Across the USA
✅ Authorized SaunaLife Dealer — full warranty
✅ Seamless customer support & delivery

SaunaLife Shipping Policy

At Sauna Sanctum, we’re proud to offer Free Shipping on all SaunaLife saunas delivered within the 48 contiguous United States.

Your order will include comprehensive freight delivery for your sauna, heater, and any additional accessories purchased together — all carefully packaged and shipped for safe arrival.

• United States (Lower 48 States): ✅ Free Shipping

• Canada: Flat-rate freight shipping — $1,250

• Other Locations: Please contact us directly for a custom shipping quote

Shipping & Delivery Timeline

Shipping times vary depending on the SaunaLife model and current availability:

• Some models are in stock and ship promptly

• Others are custom-built to order

For the most accurate estimate, please contact us and our team will provide a tailored shipping timeline for your chosen sauna.

Freight Delivery Details

All SaunaLife orders are shipped via LTL (Less-Than-Truckload) freight to ensure secure and efficient transport.

Once your order is ready to ship, the carrier will contact you directly to schedule a delivery appointment at your convenience.

Order Refusal Policy

If an order is refused for reasons other than damage or shipping errors, a 20% restocking fee will apply, along with any return shipping costs.

Need Help?

Our customer service team is here to make your delivery smooth and stress-free. Contact us anytime at support@saunasanctum.com

• Installation Guide
• Dimensions & Diagram
• Lifetime Warranty