Kooru Cold Plunge Tub – Handcrafted Redwood, Shou Sugi Ban, Ozone Purification

Kooru Cold Plunge Tub – Handcrafted Redwood, Shou Sugi Ban & Ozone Purification

Passionately handcrafted using sustainable and ethically sourced materials.

Handcrafted in San Diego from sustainably sourced redwood, the Kooru Cold Plunge Tub arrives completely set up and ready to use — no complex installation required. It plugs into a standard 110V home outlet and is simple to maintain. Available in 5 premium finishes: Natural, Oiled Leather, Spanish Oak, Dark Natural, and Teak.

Every board is hand-selected, then carefully fired and sanded using the Japanese tradition of Shou Sugi Ban — an ancient technique that chars the wood surface to enhance durability, deepen color, and expose the natural grain. The result is an unmatched depth of finish that reflects the philosophy behind cold plunging itself: good stress makes you stronger.

• Handcrafted in San Diego — sustainably and ethically sourced redwood, premier craftsmanship.
• Shou Sugi Ban finish — ancient Japanese wood-charring technique for enhanced durability and stunning grain depth.
• Ozone water purification — chemical-free, the most effective and sustainable water treatment method.
• 110V plug-in — plugs into a standard home GFCI outlet, no special electrical required.

Specifications

• Outer dimensions: ~64" L × 34" W × 35" H (subtle variances up to ¼" due to handcrafted nature)
• Tub compartment: 36" L × 24" W × 30" H (high-density polyurethane)
• Weight: ~400 lbs (movable by two people via corner posts or moving trolleys)
• Water capacity: ~60 gallons; adjustable water height from shoulders to neck/chin level
• Chiller: 1/4 hp pump, 950 GPH
• Power: 350–500W @ 3–5 amps, standard 110V GFCI outlet
• Water sanitation: Ozonator (O3) — chemical-free purification
• Filter replacement: Every 1–2 months depending on usage
• Door clearance required: At least 33" through doors/passages
• Production time: ~2 weeks; shipping ~2 additional weeks depending on location
• Available finishes: Natural, Oiled Leather, Spanish Oak, Dark Natural, Teak

Features

Shou Sugi Ban Burning — An ancient Japanese technique that preserves wood by charring the surface with a hot flame. Rather than degrading the wood, Shou Sugi Ban enhances durability and beautifies the grain, creating a stunning finish suited to both modern and rustic settings.

Adjustable Temperature Control — Simple and easy to use. The programmable chiller allows precise temperature management and straightforward maintenance.

Natural Ozone Water Purification — Ozone (O3) is a potent oxidant that breaks down contaminants and microorganisms without chemicals or harmful byproducts. Research shows it is the most effective and cost-efficient water treatment method available — and the most environmentally sustainable.

Frequently Asked Questions

Does it require special electrical installation?
No — the Kooru plugs into a standard 110V home outlet. The outlet must be GFCI or grounded as required by state laws. No dedicated circuit or special wiring is needed.

What is Shou Sugi Ban?
Shou Sugi Ban is an ancient Japanese wood preservation technique that chars the surface of the wood with a hot flame. This process enhances the wood’s durability, deepens its color, and exposes the natural grain for a distinctive, premium finish.

How is the water kept clean without chemicals?
The Kooru uses an Ozonator that emits O3 (ozone) to purify the water. Ozone is a potent natural oxidant that eliminates contaminants and microorganisms without chemicals or harmful byproducts. Filters should be replaced every 1–2 months depending on usage.

How long does it take to receive?
Production takes approximately 2 weeks, with shipping adding approximately 2 more weeks depending on your location.

What finishes are available?
The Kooru is available in 5 finishes: Natural, Oiled Leather, Spanish Oak, Dark Natural, and Teak. All are priced the same — select your finish at checkout.