The BlueCube™ C1 Cold Plunge Tub is the entry-level system in the BlueCube lineup — and by any objective measure, the most rigorously engineered cold plunge available at its level.

Handcrafted in Redmond, Oregon from 14-gauge 316 marine-grade stainless steel, the C1 delivers consistent precision-chilled cold therapy at 37 °F around the clock, with continuous RiverMode™ circulation, automated ozone sanitation, and near-silent operation — all without ice, without chemicals, and without compromise. It is the benchmark against which every competing cold plunge is measured, and the foundation upon which every BlueCube system is built. It is the centerpiece of the MWS Immersion System.

Chiller System

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

Circulation System

• Continuous 24/7 RiverMode™ water movement at 18 GPM
• Integrated 20-micron filtration and ozone sanitation running simultaneously

Frame Dimensions

• 88.5″ L × 37.5″ W × 29.5″ H

Footprint & Clearance

• 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

• 54″ L × 24″ W × 22″ H

Immersion Depth

• Full neck-depth immersion while seated
• Designed for true full-body submersion for users up to 6′3″
• Ergonomic profile for easy entry and exit — no stairs or ladders required

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

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
• 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 RiverMode™ flow
• Full tub volume cycled every 6 minutes — 10× per hour

Circulation Design

• Constant directional flow disrupts surface-level thermal layering
• Keeps water temperature consistent and uniform throughout the tub
• Clean, cold, and continuously moving — no stagnant zones

Experience

• Consistent, reliable cold exposure for disciplined daily protocol use
• Temperature and flow work together to maintain uniform cold throughout every session

Filtration System

• 20-micron commercial-grade filtration running continuously 24/7

Sanitation

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

Chemical Use

• No chemicals required for residential use
• Epsom salt and essential oils not recommended — accelerates component wear
• Chlorine drip system not available on C1 — available on C3 only

Maintenance Intervals

• Water change: approximately every 4–6 weeks
• Filter replacement: monthly for residential use
• 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 recommended for outdoor installations
• Insulated spa cover included
• Optional shower rinse station recommended when placed adjacent to a sauna
• Fill time: 10–15 minutes depending on water pressure

• 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

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
• Spa heater add-on
• Freeze-protection packages
• International electrical configurations available
• Shower rinse station add-on

Note: Custom colors 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
• Periodic water changes every 4–6 weeks depending on use frequency
• 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