Renu Therapy
Renu Therapy Aurelius
8.3/ 10
Best for Taller users who want a lay-down plunge
- Minimum temperature
- ~38 °F
- Chiller
- ~0.5 HP
- Capacity
- 1 person (lay-down)
$9,999
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Renu TherapyResearch ReviewedData confidence: High
Renu Therapy Cold Stoic 3.0
8.4/ 10
A beautifully built steel tub with the longest structural warranty here. It looks like spa furniture and is backed by strong owner ratings, though its chiller is more modest than the athlete-grade units.
Best for: Design-led buyers who want a long warranty
$11,399
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The verdict at a glance
Strengths
- Furniture-grade powder-coated steel build
- 5-year structure warranty
- Dual-stage filtration + ozone
- Very strong owner ratings
Trade-offs
- Modest 0.5 HP chiller
- Expensive
- Heavy; permanent installation
Our review
Renu Therapy's Cold Stoic 3.0 is the brand's flagship: a powder-coated steel tub with dual-stage filtration and ozone, carrying a 5-year structure warranty that is well ahead of most rivals. It holds around 95 gallons and, in independent testing, reaches roughly 37°F. Owner ratings are consistently high (4.9/5 across ~149 reviews on Renu's own store).
The chiller is a modest 0.5 HP, so this is not the tub for someone chasing near-freezing water in a hot climate — it prioritises build, finish and warranty over raw cooling headroom. For buyers who want a furniture-grade steel plunge they will keep for years, it is one of the most reassuring choices.
Living with it
Installation
Freestanding; needs a slab rated for heavy filled weight.
Electrical
Dedicated 110V / 20A recommended
Running cost
Approx. $40–70/month
Warranty
5-year structure
Maintenance
Dual-stage filtration + ozone; steel body prefers covered installation.
Returns
Limited returns
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See this product side by side with its closest rivals.
Related guides
Sources
The manufacturer documentation, independent reviews and retailer listings this review draws on, with the date each was last checked.
- manufacturerRenu Therapy cold plunge tanksChecked 2026-08-16
- independent testingBest Cold Plunge Tubs (2026): Personally TestedChecked 2026-08-16
- customer reviewAggregated verified owner feedbackChecked 2026-07-02
Alternatives to consider
Plunge
Plunge All-In
8.5/ 10
Best for All-in-one cold and contrast therapy with minimal upkeep
- Minimum temperature
- 37 °F
- Chiller
- 1.0 HP
- Capacity
- 1 person
$8,640$9,990
Research
BlueCube
BlueCube C3
8.0/ 10
Best for Athletes and facilities needing very cold, fast-recovering water
- Minimum temperature
- 34 °F
- Chiller
- Commercial-grade
- Capacity
- 1 person
$20,500
Research