The BlueCube™ C3 Cold Plunge Tub is the flagship system in the BlueCube lineup — engineered for full-body immersion, continuous commercial-grade performance, and uncompromising long-term durability.

Handcrafted in Redmond, Oregon, the C3 combines the most powerful flow system, the largest immersion tub, and the most complete sanitation options in the BlueCube range. Available in 66-inch and 72-inch configurations, it is the only BlueCube designed to accommodate users of any height without restriction — and the only model in the lineup compatible with an automated chlorine drip system for clients who require clinical-grade sanitation compliance. Its architectural form, material integrity, and system design position it as a true performance instrument — built for daily use in both the most demanding residential environments and high-volume commercial facilities.

Chiller System

• BlueCube proprietary 1 HP commercial-grade chiller
• Japanese magnetic-drive pumps — near-silent operation
• Wi-Fi enabled remote temperature adjustment
• App-based monitoring and control

Circulation System

• Continuous 24/7 water movement
• V-RiverMode™ three-speed variable flow system
• Integrated filtration, ozone sanitation, and optional automated chlorine drip running simultaneously

Frame Dimensions

• 66-inch Model: 72.5″ L × 48.5″ W × 29.5″ H
• 72-inch Model: 79.5″ L × 48.5″ W × 29.5″ H

Footprint & Clearance

• Wide-format 48.5″ design — significantly more interior width than C1 and C2
• 29.5″ height — can be tilted on its side to pass through standard interior doors and narrow hallways
• 18″ front clearance required for chiller motor exhaust
• 18″ side clearance required for filter housing access
• Rear can sit flush against a wall
• Opposite side of filter access can be 3–4 inches from a wall

Tub Interior

• 66-inch Model: 66″ L × 24″ W × 22″ H
• 72-inch Model: 72″ L × 24″ W × 22″ H

Immersion Depth

• Full neck-depth immersion while seated across both tub sizes
• 66-inch model designed for users up to 6′9″ with full leg extension
• 72-inch model designed for users 6′9″ and above — maximum immersion comfort at any height
• Ergonomic profile for easy entry and exit — no stairs or ladders required
• Sufficient interior length to reposition, stretch, and move freely during session

Tub Material

• 14-gauge 316 marine-grade stainless steel
• Approximately 30% thicker than industry standard
• Resistant to corrosion and long-term degradation
• American hemp and fiberglass tub options available

Frame Construction

• Marine-grade plywood frame, hand-built in-house
• Finished with Line-X® protective coating for maximum structural integrity

Exterior Finish

• Line-X® truck-bed spray lining
• Fully weatherproof and impact-resistant
• Available in standard Black, Grey, and White
• Custom Pantone color matching available

Deck Options

• Premium Black Walnut wood deck
• Premium Mahogany wood deck
• Full Line-X® exterior — no wood deck option for clients who prefer a fully weatherproof seamless finish

Note: Wood decks require maintenance and periodic top coat reapplication. Warranty does not apply to wood decks placed in direct sun. Shade placement is strongly recommended to protect against weathering.

Insulation

• Spray foam insulated tub and cabinet for thermal efficiency and energy conservation

Plumbing

• 1.5″ PVC plumbing throughout for maximum flow rate and cleaning performance

Origin

• Handcrafted in Redmond, Oregon, USA with locally sourced materials

Temperature Range

• Cools to approximately 37 °F — no ice required
• Full adjustable range: 37 °F – 70 °F

Performance Profile

• Full clinical cold exposure range
• Rapid temperature recovery during use
• Engineered to support 11–15 plunges per hour in high-volume environments
• Chills at approximately 11–13 °F per hour from ambient temperature

Noise Level

• Under 60 dB
• Chiller fan cycles off automatically once target temperature is reached
• Magnetic-drive Japanese pump operates at near-silent levels during all sessions

Base Circulation

• 18 GPM (1,080 GPH) continuous constant flow

V-RiverMode™

• Three-speed variable hydro-agitation system — Low · Medium · High
• Adds 21 GPM (1,260 GPH) of active directional current at full River Mode
• Actively breaks the thermal boundary layer at the skin surface
• Drives cold deeper and more consistently throughout immersion

Experience Control

• Adjust session intensity independently through both temperature and flow rate
• Designed to replicate natural cold water immersion conditions
• Titrate experience from steady circulation to maximum-intensity active flow
• The most powerful and complete flow experience in the BlueCube lineup

Filtration System

• 20-micron commercial-grade filtration running continuously 24/7
• 35 sq. ft. pool-grade filter for high-volume environments

Sanitation

• Automated ozone sanitation system
• Full water turnover every 6 minutes — 10× per hour

Chemical Use

• No chemicals required for residential use
• Automated chlorine drip system available — C3 exclusive
• Chlorine and bromine capable at 3 PPM low-dose for commercial compliance
• Epsom salt and essential oils not recommended — accelerates component wear

Maintenance Intervals

• Water change: approximately every 4–6 weeks for residential use
• Filter replacement: based on bather load for commercial environments — daily washing recommended at 50+ plunges per day
• Filters are washable and reusable 2–3 times before replacement

Power Supply

• Voltage: 110/120 V
• Dedicated 20A circuit required — NEC code compliant
• GFCI plug included

Operating Load

• 9.46 amps (~1.14 kW)
• Energy-efficient continuous operation
• Higher draw during active chilling — reduced draw once target temperature is maintained

App Control

• Wi-Fi enabled BlueCube app
• Remote monitoring and temperature adjustment from any location — not limited to home network

System Portal

• Maintenance tracking and logging
• Warranty documentation management
• Supply management for extended warranty compliance

Installation Environment

• Indoor or outdoor use — fully weatherproof construction throughout

Weather Resistance

• Line-X® exterior withstands impact, UV exposure, rain, snow, and extreme temperature variation

Cold Climate Compatibility

• Freeze-protection packages available for ambient temperatures below 20 °F

Placement Notes

• Shade strongly recommended for outdoor installations — particularly for wood deck configurations
• Insulated spa cover included
• Optional shower rinse station strongly recommended when placed adjacent to a sauna
• Fill time: 10–15 minutes depending on water pressure
• Four movers with dollies recommended for placement due to unit weight (~750 lbs empty)

• Insulated spa cover
• 3-month starter filter supply
• 6-month cleaning kit supply
• GFCI plug
• Full assembly — arrives plug-and-plunge ready
• U.S.-based live video call technical support — Monday through Friday, 9 am to 5 pm PST

Residential Warranty

• 3-year bumper-to-bumper coverage — components, plumbing, electrical, labor, and shipping

Commercial Warranty

• 1-year bumper-to-bumper coverage

Extended Protection

• 5-year Lifetime Protection Program available for both residential and commercial — requires maintenance schedule compliance and portal logging

Structural Warranty

• 15-year frame and tub warranty — 14-gauge 316 marine-grade stainless-steel construction

Component Notes

• Chilling motor, water pump, and ozone components carry a 1.5-year warranty
• All components are field-replaceable throughout the product life

Serviceability

• All components field-replaceable
• Supported by licensed pool and spa technicians
• On-site technical support available for residential and commercial clients

• Standard Line-X® colors — Black, Grey, White
• Custom Pantone color matching
• Premium Black Walnut wood deck — C3 exclusive finish option
• Premium Mahogany wood deck
• Full Line-X® exterior — no wood deck
• Automated chlorine drip system — C3 exclusive
• Skimmer add-on — C3 exclusive
• Spa heater add-on
• Freeze-protection packages
• International electrical configurations available
• Shower rinse station add-on

Note: Custom colors and wood deck configurations carry a 12–16 week lead time and are non-refundable and non-returnable once production begins.

• Handcrafted in the United States
• GFCI protection included on all units
• NEC code compliant electrical configuration — dedicated 20A circuit
• Field-serviceable design — accessible component compartment for licensed pool and spa technicians
• 30-day satisfaction guarantee on standard models — 25% restocking fee applies
• Custom-built units are non-refundable and non-returnable once production begins

• Continuous 24/7 filtration and ozone sanitation significantly reduce manual upkeep requirements
• Monthly filter cleaning and replacement recommended for residential use
• Commercial environments require daily filter washing at high bather loads
• Periodic water changes every 4–6 weeks depending on use frequency and bather load
• Automated chlorine drip system available for clients requiring hands-off commercial-grade sanitation compliance
• Maintenance supplies available directly from BlueCube, Amazon, Spa Depot, and major online retailers
• Extended warranty clients receive automatic supply shipments to home or business
• All systems engineered for long-term durability — full component replaceability throughout product life