The Kooru Cold Plunge Tub is a handcrafted cold water immersion tub built in San Diego from sustainably sourced, ethically harvested redwood. Each tub is finished using the traditional Japanese Shou Sugi Ban technique — a centuries-old method of charring wood to enhance its durability and bring out the natural grain. The result is a tub that is as functional as it is visually distinctive. It arrives fully assembled, plugs into a standard 110V outlet, and includes a built-in chiller and ozone water purification system — so there are no complicated installations or chemical treatments to manage.
Why Customers Choose This Tub
- Handcrafted in San Diego from sustainably sourced redwood
- Shou Sugi Ban finish for exceptional durability and a distinctive look
- Arrives fully assembled — no installation required
- Plugs into a standard 110V home outlet (GFCI recommended)
- Built-in 1/4 HP chiller with adjustable temperature control
- Ozone water purification — no harsh chemicals needed
- Available in 5 handcrafted color finishes
- Each tub is individually crafted with hand-selected boards
Product Highlights
Shou Sugi Ban Wood Finish
Each board is individually fired and sanded using the traditional Japanese Shou Sugi Ban technique. This process enhances the wood's natural durability, deepens the grain color, and creates a finish that works equally well in modern and rustic settings.
Fully Assembled and Ready to Use
The Kooru tub ships fully assembled and configured. Simply position it, fill it with water, and plug it into a standard 110V outlet — no plumber or electrician required.
Built-In Chiller with Adjustable Temperature
The integrated 1/4 HP chiller (950 GPH pump) maintains your preferred water temperature with straightforward, programmable controls. No separate chiller purchase necessary.
Ozone Water Purification
The built-in ozonator emits O3 to break down contaminants and microorganisms in the water without the use of harsh chemicals. Filters require replacement approximately every 1–2 months depending on usage frequency.
Sustainably Sourced Redwood Construction
The exterior is built from hand-selected redwood boards chosen for grain consistency and structural integrity. The interior tub liner is high-density polyurethane, custom-made for this model.
5 Handcrafted Color Finishes
Choose from Natural, Oiled Leather, Spanish Oak, Dark Natural, or Teak — each finish is applied by hand and may have subtle natural variation, which is characteristic of the craft.
Specifications
- Exterior Dimensions: Approx. 64" L x 34" W x 35" H (±¼" variance due to handcrafted nature)
- Interior Tub Compartment: 36" L x 24" W x 30" H
- Minimum Door/Passage Clearance Required: 33 inches
- Weight: Approx. 400 lbs
- Water Capacity: Approx. 60 gallons
- Chiller: 1/4 HP pump, 950 GPH
- Water Purification: Ozonator (O3 emission)
- Power Requirements: 110V standard outlet; 350–500W, 3–5 amps
- Outlet Type: Standard home outlet (GFCI or grounded outlet required per state regulations)
- Interior Liner: High-density polyurethane
- Exterior Material: Sustainably sourced redwood with Shou Sugi Ban finish
- Filter Replacement Interval: Every 1–2 months (usage dependent)
- Available Finishes: Natural, Oiled Leather, Spanish Oak, Dark Natural, Teak
- Production Lead Time: Approx. 2 weeks
- Estimated Shipping Time: Approx. 2 weeks (location dependent)
Ideal For
- Homeowners seeking a premium, design-forward cold plunge for indoor or outdoor use
- Athletes and active individuals incorporating cold water immersion into their recovery routine
- Wellness-focused buyers who want a chemical-free water treatment system
- Anyone looking for a fully assembled, plug-and-use cold plunge with no installation complexity
- Buyers who value handcrafted, sustainably sourced products with a distinctive aesthetic
Important Information
- A minimum of 33 inches of door or passage clearance is required to move the tub to its intended location. Measure your access points before ordering.
- The tub must be plugged into a GFCI or properly grounded 110V outlet, as required by applicable state regulations. Do not use an extension cord.
- The tub weighs approximately 400 lbs. Two people or moving equipment (such as a trolley) are required to reposition it by gripping the corner posts.
- Due to the handcrafted nature of this product, exterior dimensions may vary by up to ¼ inch in length and width. Minor natural variation in wood grain and finish color is expected and characteristic of the craft.
- Filter replacement is required approximately every 1–2 months depending on frequency of use. Replacement filters are available separately.
- Production lead time is approximately 2 weeks. Shipping time varies by location and is estimated at an additional 2 weeks.
- Consult a qualified healthcare provider before beginning any cold water immersion practice, particularly if you have cardiovascular or other health conditions.
Frequently Asked Questions
Does this tub require professional installation?
No. The Kooru Cold Plunge Tub arrives fully assembled and ready to use. Simply place it in your desired location, fill it with water, and plug it into a standard 110V GFCI or grounded outlet.
What electrical outlet does it require?
The tub plugs into a standard 110V home outlet. It draws 350–500 watts at 3–5 amps. A GFCI or grounded outlet is required per state regulations. Do not use an extension cord.
How does the ozone purification system work?
The built-in ozonator emits O3 (ozone), which is a potent oxidant that breaks down contaminants and microorganisms in the water without the use of chlorine or other chemicals. It is one of the most effective and environmentally friendly water treatment methods available.
How often do I need to change the filter?
Filter replacement is recommended approximately every 1–2 months, depending on how frequently the tub is used. Replacement filters are available separately.
Will the tub fit through my doorway?
A minimum of 33 inches of clearance through all doors and passages is required. Please measure your access points carefully before ordering. If you have questions about delivery logistics, contact us before placing your order.
What is the Shou Sugi Ban finish?
Shou Sugi Ban is a traditional Japanese wood preservation technique that involves charring the surface of the wood with a flame, then sanding it to reveal the grain. The process enhances the wood's natural durability and produces a deep, distinctive finish. Each board is fired and sanded by hand.
How long does it take to receive my tub?
Each tub is handcrafted to order with a production lead time of approximately 2 weeks. Shipping time varies by location and is estimated at an additional 2 weeks. Total estimated delivery time is approximately 4 weeks from order date.
Are the dimensions exact?
Due to the handcrafted nature of this product, exterior dimensions may vary by up to ¼ inch in length and width. The nominal exterior dimensions are approximately 64" L x 34" W x 35" H.
Can the tub be moved after it is placed?
Yes. The tub can be repositioned by two people gripping the corner posts, or with the use of moving trolleys. The tub weighs approximately 400 lbs when empty.
The Kooru Cold Plunge Tub is a handcrafted, fully equipped cold water immersion tub built to last. If you are looking for a premium, design-forward option that requires no installation and no chemical treatments, this tub is worth a close look. Order today and receive free shipping across the USA.
This product is not intended to diagnose, treat, cure, or prevent any disease or medical condition. Cold water immersion may not be appropriate for everyone. Consult a qualified healthcare provider before use, especially if you have a pre-existing health condition.