
Plunge
Plunge All-In
Best for All-in-one cold and contrast therapy with minimal upkeep
- Minimum temperature
- 37 °F
- Chiller
- 1.0 HP
- Capacity
- 1 person

The DEEP D1 is BlueCube's entry point: a 33"-square upright tub for standing, neck-deep immersion, driven by a 13,600 BTU commercial chiller, RiverMode water agitation, and ozone sanitation, with a 3-year residential warranty plus 10 years on the aluminum tub. It demands a dedicated 20-amp circuit with a NEMA 5-20 outlet, only reaches 41°F, and each unit is built to order — the current queue is measured in weeks.
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BlueCube builds the D1 by hand in Redmond, Oregon around a double-walled aerospace-grade aluminum frame with advanced insulation and a UV-protective finish. Its upright "deep" geometry lets one person stand grounded with water to the neck in a 33" x 33" x 43.2" tub (66.63" x 41.63" total footprint with the chiller-housing staircase). A 1.5 HP+, 13,600 BTU commercial chiller with an outdoor-rated compressor cools about 5°F per hour across a 41–104°F range and runs in ambient temperatures down to 20°F, while the signature RiverMode system — a near-silent Iwaki magnetically coupled pump — keeps a continuous cold current moving and turns the water over roughly six times per hour through a 20-micron filter with automatic ozone sanitation. The whole unit runs under 60 dB, and the chiller fan shuts off once the water reaches temperature.
The commitments are specific: a dedicated 110/120V 20-amp circuit with a NEMA 5-20 receptacle (per NEC code for cold plunges), curbside freight delivery that requires two to four movers with dollies, and a build queue — currently estimated at 49 days — since every tub is made to order. Warranty coverage is strong for the class at 3 years residential parts and labor (1 year commercial) plus 10 years on the tub and frame, extendable to 5 years via subscription. Water volume is not published, the 41°F floor is the warmest minimum in this group, and automated chlorine/pH dosing is not available on this model — BlueCube points commercial upright buyers to its larger Limitless line instead.
Installation
Arrives fully assembled by curbside freight; only the spa-union plumbing between tub and staircase needs connecting — no plumber; 2-4 movers with dollies recommended; staircase side needs 18" clearance
Electrical
Dedicated 110/120V, 20-amp circuit (NEC requirement); ships with Leviton self-testing GFCI NEMA 5-20P plug
Running cost
Not published; chiller fan runs only while actively chilling and shuts off at temperature, and outdoor operation is rated down to 20°F ambient
Warranty
3-year residential / 1-year commercial full coverage (parts and labor); 10-year residential warranty on tub and frame; extendable to 5 years via subscription plan; 30-day refund guarantee with restocking fee
Maintenance
Automatic ozone sanitation with 20-micron filtration turning the water over ~6x/hour; 3-month filter supply and 6-month cleaning-kit supply included; no automated chlorine/pH dosing available on this model
See this product side by side with its closest rivals.
The manufacturer documentation, independent reviews and retailer listings this review draws on, with the date each was last checked.

Plunge
Best for All-in-one cold and contrast therapy with minimal upkeep

Renu Therapy
Best for Design-led buyers who want a long warranty

Plunge
Best for Buyers who want a commercial-grade separate chiller