
Crafted to Endure
SaunaLife Model S1 Cold/Hot Immersion Tub
Premium Nordic timber and precision construction that ages beautifully, season after season.
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Specifications & Details
Full Specifications
Model: MODEL S1
Material: Thermo-Pine
Exterior Dimensions: 40"Diameter (102 cm) x 41.3"H (105 cm)
Interior Dimensions: 34.4"Diameter (87 cm) x 36"H (91 cm)
Water Capacity: 124 Gallons
Product Weight: 124 lbs (56.2 kg)
Product Weight When Filled: 1158 lbs (525.2 kg)
Shipping Dimensions: 47.8"W (121 cm) x 46"D (117 cm) x 48.1"H (122 cm)
Shipping Weight: 265 lbs (120 kg)
Specifications subject to change. Please contact us to verify current specifications before purchase.
Dimensions & Weight
Exterior Dimensions: 40"Diameter (102 cm) x 41.3"H (105 cm)
Interior Dimensions: 34.4"Diameter (87 cm) x 36"H (91 cm)
Water Capacity: 124 Gallons
Product Weight: 124 lbs (56.2 kg)
Product Weight When Filled: 1158 lbs (525.2 kg)
Shipping Dimensions: 47.8"W (121 cm) x 46"D (117 cm) x 48.1"H (122 cm)
Shipping Weight: 265 lbs (120 kg)
Materials & Construction
Model: MODEL S1
Material: Thermo-Pine
Electrical Requirements
This product requires professional installation by a licensed electrician. Electrical requirements depend on the heater or generator system selected — please refer to the installation manual.
What's Included
- Thermowood Walls, 0.7" (1.7 cm)
- Foundation Beams, 3.94" (10 cm) x 3.94" (10 cm)
- Round Deluxe Stairs
- Drainage, 1" (3 cm)
- Chiller Connections, 3/4" (2 cm) NPT
- Fiberglass Insert
- Installation Instructions
FAQ
What temperature should I set my SaunaLife S1 cold plunge?
Most users target 50–59°F for general recovery and wellness, or 39–50°F for more intense cold therapy. Research suggests water in the 50–59°F range provides significant norepinephrine and dopamine boost while remaining accessible for most users.
Does the SaunaLife S1 come with a chiller?
The SaunaLife S1 is available as a tub-only model or bundled with a matched water chiller. The chiller package maintains your target temperature automatically without requiring ice. Contact us to order the version that suits you.
How many people fit in the SaunaLife S1?
The SaunaLife S1 is a 1-person cold plunge tub designed for full solo immersion. The S2 model is available for 2-person use.
What is the SaunaLife S1 made from?
The SaunaLife S1 features a Western Red Cedar exterior with a marine-grade stainless steel interior liner — the same material combination used in high-end commercial cold plunge facilities. Cedar is naturally antimicrobial and moisture-resistant.
How do I maintain the SaunaLife S1?
Maintain proper water chemistry (pH 7.2–7.8, sanitized with bromine or non-chlorine shock), clean the stainless liner weekly, and drain and deep clean monthly. With a chiller attached, you can extend water change intervals significantly.


SaunaLife
Designed Around You
A premium SaunaLife sauna kit — precision-crafted for even heat and built to be enjoyed daily.
SaunaLife
Craft You Can Feel
Premium Nordic spruce, tight joinery, and a finish built to last for years of use.

SaunaLife Model S1 Cold/Hot Immersion Tub
Overview
The SaunaLife Model S1 is a one-person outdoor immersion tub built for serious recovery — cold plunges, warm soaks, or contrast therapy at home. A contoured fiberglass interior sits inside a durable Thermo-Spruce surround, holding over 124 gallons for a deep, full-body soak that fits any backyard or wellness space.
- Dual-therapy soak — cold plunge or warm immersion
- 124+ gallon capacity for a deep, full-body soak
- Thermo-Spruce surround with matching wood access steps
- Arrives fully assembled
Key Features
Build & Materials
- Thermo-Spruce tub surround (1.65" thick) — lasts up to 2X longer than cedar
- Thick dark grey contoured fiberglass lining for added comfort
- Matching Thermo-Spruce wood steps for easy access
Comfort & Use
- Designed for outdoor ergonomic cold/hot tub bathing
- Arrives fully assembled
Capacity & Dimensions
- Luxury outdoor cold/hot immersion tub for 1 bather
- Holds over 124 gallons
- Exterior: 40" diameter (102 cm) x 41.3"H (105 cm)
- Interior: 34.4" diameter (87 cm) x 36"H (91 cm)
Craftsmanship
- Designed by SaunaLife, handcrafted in Northern Europe
Complete Your Plungecustomize & add extras
Color Natural
Configuration Tub Only
Insulated Cover made for this series · confirmed fit
Shipping to Alaska, Hawaii, or Puerto Rico?


COLD + HOT IMMERSION
One-person recovery in natural wood
From ice-cold plunge to warm soak, the S1 pairs natural-wood styling with a compact immersion tub built for daily contrast therapy.
View specificationsSauna Company USA Policies
Shipping, Warranty & Returns
Shipping & Delivery
- Flat-rate freight: from $495 to the contiguous U.S. (Lower 48 states), shipped via LTL freight.
- Alaska, Hawaii & Puerto Rico — we ship there; call or text (856) 426-8530 first for a freight quote (online checkout is Lower-48 only).
- Most orders dispatch within 5 business days; a tracking number is emailed within 24 hours of shipment.
- Curbside delivery only — the driver lowers the item to ground level on a wooden pallet.
Warranty Coverage
2-Year Structural Warranty
SaunaLife warrants the tub or plunge wood structure and hardware against defects for 2 years from the original purchase date, for residential use only.
1-Year Mechanical Components
Chiller/heater units, pumps, filters, and electronic controls are covered for 1 year.
Not Covered
- Natural wood weathering or discoloration
- Consumable components (filters, seals)
- Commercial or rental use
- Damage from improper installation
To File a Claim
Email info@saunacompanyusa.com with your order number and supporting photos.
Returns & Refunds
30-Day Return Policy
We accept returns on this product within 30 days of delivery. To initiate a return, email info@saunacompanyusa.com with your order number.
Shipping Damage — If the return is required due to damage, include photos of the damage and note whether shipping damage was recorded upon signing for delivery. Shipping costs are fully covered for carrier-caused damage.
No-Damage Returns — No restocking fee is charged. You will be issued a credit for the full amount paid, less any required new boxing fees of approximately $20–$50 depending on the product.
Damaged Product — If the product is damaged, you will be notified to file a claim with your shipper. We assist throughout the process.
View our full Return Policy for complete details.
Installation & Assembly
Curbside Delivery
Freight deliveries are curbside only — the driver will not unpack or carry items indoors. You are responsible for moving the product from curbside and for any assembly. Please arrange help or local movers for delivery day.
White Glove Delivery (Optional)
White glove delivery is available by customer arrangement. You contact and book a white glove delivery service of your choice — we ship the sauna to their facility, and they handle the final-mile delivery and placement. Email info@saunacompanyusa.com for help finding a local white glove provider.
Financing Options
Payment Methods
Payment is made at the time of order via the methods we offer — major credit cards, PayPal, and financing partners. Payment processing is handled securely by our third-party processors.
Pricing & Tax
All prices are in U.S. dollars; applicable sales tax is calculated at checkout. Tax-exempt? Provide documentation prior to purchase. Questions: info@saunacompanyusa.com · 856-426-8530.
Resources
Documents & Manuals
Installation Manual
Dimensions & Specifications
Care & Maintenance Guide
Limited Warranty
2-Year Structural Warranty
SaunaLife warrants the tub or plunge wood structure and hardware against defects for 2 years from the original purchase date, for residential use only.
1-Year Mechanical Components
Chiller/heater units, pumps, filters, and electronic controls are covered for 1 year.
Not Covered
- Natural wood weathering or discoloration
- Consumable components (filters, seals)
- Commercial or rental use
- Damage from improper installation
To File a Claim
Email info@saunacompanyusa.com with your order number and supporting photos.
The Experience
The Outdoor Sauna, Perfected
Crafted as a fully-assembled architectural retreat, this is outdoor living elevated — premium Nordic timber, expansive glass, and the quiet luxury of heat on demand.
Watch & learn
Installation Guide
We know a sauna is a big purchase. We've gathered honest video tours and reviews so you can see this exact model in action before you decide — and our team is always just a message away if you have any questions.
to a friend
The S1 immersion tub is stunning solid wood and the dual cold/hot capability is exactly what I wanted. I plunge cold in the mornings and soak warm on cold evenings. The freight delivery arrived curbside on a pallet, well crated, and two of us handled it fine. Water stays clear with the filtration and the lid keeps the temperature stable between uses. Genuinely the highlight of my daily routine.
Pairing this with our sauna for hot-cold contrast has been transformative for my recovery and sleep. The S1 is deep enough to submerge fully and the wood barrel looks beautiful on our deck. It holds cold temperatures impressively well even on hot days. Setup was simple for two people.
Love the S1. The build quality is superb and the immersion depth is great for a true cold plunge. My only note is figuring out the draining and refilling routine took a little planning, and the curbside freight was heavy. Once you have a system it's effortless. The cold water mornings have become non-negotiable for me.
This tub is a piece of art. The staves are tight, the bands solid, and the wood finish is gorgeous. We use it cold in summer and warm in winter and it handles both. The water clarity has stayed excellent for weeks at a time. Highly recommend for anyone serious about cold therapy.
As someone who lifts heavy, the cold plunge has cut my soreness dramatically. The S1 is deep, the water stays clean, and it looks fantastic on the patio. Easy to set up with a partner. No regrets.
The dual cold/hot feature is what sold me and it delivers. Cold plunges in the morning, warm soaks at night - all in one beautiful wooden tub. The curbside delivery was on time and well packaged. Two of us positioned it easily. Love it.
The tub itself is beautiful and well made. Just know that without a chiller the cold side relies on ice or ambient temps, so in summer I had to add a chiller to keep it genuinely cold. That extra cost is the reason for three stars. As a soaking and plunge vessel, the craftsmanship is outstanding and I use it daily.
A cold plunge before coffee has completely changed my mornings. The S1 is deep, beautiful, and well built. The lid does a great job keeping the water cold and clean overnight. Setup was quick and the delivery was smooth.
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