Cold plunge · all in one
Renu Therapy Cold Stoic 2.0
A heavily insulated plunge with an integrated chiller, three-stage filtration, and ozone plus UV, reaching about 36 F.
8.5
Excellent
Composite (0-10), cold-plunge-v1.0
Confidence: Verified
By the numbers
- Cooling
- built-in chiller
- Coldest temp
- 36 F
- Water care
- ozone, UV, filtration
- Insulated
- yes
- Capacity
- 95 gal
- Material
- Insulated composite walls, wood finish
- Est. annual electricity
- ~$340/yr
- Warranty
- 5 years
- Price
- $9,499
Strengths
- + Cooling: 10.0/10
- + Water Care: 10.0/10
- + Build & Insulation: 10.0/10
Watch-outs
- No significant weaknesses flagged.
Who it is for
- · Anyone who wants cold water on demand without hauling and replacing ice
- · People who want low-maintenance, cleaner water between changes
How it scored
Cooling
10.0/10 · 30%Whether the unit actively chills, and how cold it gets. An ice-only tub is not a self-chilling plunge.
- +6Built-in chiller Apowered chiller included - Cools the water actively, with no need to buy or add ice.
- +2Reaches 45 F or colder B36 F - Reaches at least the 45 F range used in most cold-immersion protocols.
- +2Reaches ice-bath cold B36 F - Reaches 39 F or colder, true ice-bath territory.
Water Care
10.0/10 · 20%Ozone, UV, and filtration that keep the water clean between changes.
- +4Ozone sanitation Bozone - Ozone keeps the water clean between changes.
- +3UV sanitation BUV - UV stage reduces microbial growth.
- +3Filtration / circulation Bfilter + pump - A circulating filter keeps debris out and water clear.
Build & Insulation
10.0/10 · 15%Insulation (holds temperature, lowers running cost) and full-immersion capacity.
- +6Insulated Binsulated shell/cover - Insulation holds temperature and lowers the chiller's running cost.
- +4Full-immersion capacity C95 gal - Large enough for full-body immersion.
Value
4.5/10 · 20%Running cost - the chiller electricity brands rarely put on the box.
- +2.5Chiller running cost vs class A~$340/yr electricity (near class median) - Estimated annual chiller electricity, scored against the chiller-unit median. The cost brands rarely disclose.
- +2Insulation lowers running cost Binsulated - Insulation reduces the electricity needed to hold temperature.
Practical
7.0/10 · 15%Warranty, electrical-safety listing, and plug-and-play convenience.
- +4Long warranty B5-year - Five-year or longer warranty.
- +3Plug-and-play Bno manual ice - Runs without hauling and replacing ice.
What to know before buying
- · Built-in chiller maintains a set temperature with no ice required; manufacturer lists a minimum around 36 F.
- · Premium stainless and wood construction is a large part of the roughly $9,499 price.
- · Confirm which water-care components (filtration, ozone, or UV) are included versus sold separately before buying.
- · Runs on standard power; factor in ongoing electricity to run the chiller continuously.
- · Heavy, fixed-install unit rather than a portable tub; plan placement and access to power and drainage.
FAQ
- How cold does the Cold Stoic 2.0 get and how is the water kept clean?
- Its integrated chiller reaches about 36 F, which in our scoring lands in true ice-bath territory, and it pairs ozone, UV, and three-stage filtration for water care. It also carries a 5-year warranty, the longest in our cold-plunge set.
- Is the chiller electricity high on this one?
- We estimate about $340 a year in chiller running cost, near the chiller-unit median in our set, and we surface that under Value because it is the cost rarely shown up front. Its heavy insulation is one reason we score it well there, since insulation lowers the electricity needed to hold temperature.
Last reviewed 2026-05-30. Scored under cold-plunge-v1.0. See the methodology. Informational only, not medical advice.