Cold & Hot Immersion Tub | SaunaLife S1B | 1-Person Black

SaunaLife SOAK-Series Model S1B Cold & Hot Immersion Tub

1-Person | Cold & Hot Immersion | ~124 Gallon | Thermo-Spruce | Fully Assembled

The SaunaLife SOAK-Series Model S1B Cold & Hot Immersion Tub is a 1-person outdoor immersion tub for cold plunging and warm soaking, with a contoured fiberglass interior and a handcrafted Thermo-Spruce surround. It arrives fully assembled.

The black Thermo-Spruce surround (1.65″ thick) is thermally enhanced and rated to outlast cedar, wrapping a contoured black fiberglass interior that holds roughly 124 gallons. Matching black thermo-spruce steps make it easy to get in and out, and a 1″ drain plus 3/4″ NPT chiller connections let you add a chiller/heater unit for full cold-and-hot temperature control.

Who This Is For

The Model S1B suits homeowners building a backyard wellness space, a home gym, or a recovery area who want a well-made cold-and-hot immersion tub that arrives ready to use.

Why Choose the Model S1B

• Handcrafted in Northern Europe from thermally enhanced Thermo-Spruce
• Arrives fully assembled — minimal setup required
• Contoured fiberglass interior for comfortable immersion
• Black finish with matching wood steps
• 3/4″ chiller connections — add a chiller/heater for full cold-and-hot control

Key Features

• Cold & hot immersion tub for cold plunging and warm soaking
• Contoured black fiberglass interior, holds roughly 124 gallons
• Black thermo-spruce surround (1.65″ thick), thermally enhanced to outlast cedar
• Matching black thermo-spruce steps for easy access
• 1″ drain and 3/4″ NPT chiller connections
• Chiller/heater unit sold separately (or choose the matching -C package)
• Up to 1 bather
• Arrives fully assembled

Specifications

• SKU: 128695
• GTIN/Barcode: 810179578138
• Model: S1B
• Series: SOAK-Series
• Capacity: Up to 1 person
• Finish: Black
• Construction: Thermo-Spruce exterior, fiberglass interior
• Water Capacity: ~124 gallons
• Interior Dimensions: 34.4"Diameter (87 cm) x 36"H (91 cm)
• Exterior Dimensions: 40"Diameter (102 cm) x 41.3"H (105 cm)
• Weight: 124 lbs (56.2 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)

What's Included

• Fully assembled immersion tub
• Contoured fiberglass insert
• Thermowood walls (0.7″)
• Foundation beams
• Round deluxe Thermo-Spruce stairs
• 1″ drainage
• 3/4″ NPT chiller connections
• Installation manual

Note: This is the tub only. A chiller/heater unit is required for active cold plunging or heating and is sold separately (or choose the matching -C package).

Shipping & Delivery

Free freight shipping is included for delivery within the contiguous United States. This tub arrives fully assembled, delivered by special appointment on a wooden pallet — curbside only. In-stock orders typically ship within 4–7 business days.

About This Delivery: The weight and packaging of this handcrafted tub requires delivery by special appointment. It arrives on a wooden pallet encased in wood for solid protection. The driver is responsible for “curbside delivery only” and will lower the item to ground level. Prior to shipping this product, we often contact customers to share shipment details and discuss any extenuating delivery circumstances that may complicate or cause additional delivery expenses. Our goal is to ensure your project’s success.

• Shipping Dimensions: 47.8"W (121 cm) x 46"D (117 cm) x 48.1"H (122 cm)
• Shipping Weight: 265 lbs (120 kg)
• Delivery is by appointment — you will be contacted to schedule

Setup Notes

• Place on a level, stable surface that can support the filled weight
• Fill with water; a 1″ drain is provided for emptying
• For active cold plunging or heating, connect a chiller/heater unit to the 3/4″ NPT connections
• Arrives fully assembled

Warranty

Prime Regeneration is an authorized retailer of SaunaLife products. Full manufacturer warranty coverage applies. For warranty details, see the SaunaLife Manufacturer Warranty (PDF).

Manuals & Documentation

• Installation manual included with the product
• Manufacturer Warranty (PDF)

FAQ

Does the Model S1B include a chiller or heater?
No. This is the tub only. It has 3/4″ NPT chiller connections so you can add a chiller/heater unit for active cold plunging or heating — or choose the matching -C package, which bundles one in.

Does it come assembled?
Yes. It arrives fully assembled with matching wood steps.

Can I use it for both cold and hot?
Yes, with a connected chiller/heater unit.

Is shipping included?
Yes. Free freight shipping is included for delivery within the contiguous United States, by appointment on a wooden pallet — curbside only.

Is financing available?
Yes. Financing options are available at checkout.