Renu Therapy Cold Stoic 3.0 Hot and Cold Plunge with Chiller
- 38-41°F minimum
- 81-100 gal
- 1/2 HP chiller
- Heats to 100°F or more
SVT Score
A 95-gallon hot and cold plunge with a built-in 0.5 HP chiller and heater, app control and a household plug.
$12,799
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Usability
4.1 out of 10
- Note: Renu gives about 2°F an hour cooling and 4°F an hour heating
Better on heating / cooling powerBlueCube C1$16,500Scores 10.0- Filter: two-stage filter, micron rating not published; basic lid included, insulated cover extra
- Searched: Intertek UL CSA CPSC Health Canada
Better on verificationPlunge Original cold plunge tub with Pro ChillerIntertek lists Plunge's maker. $8,490Scores 4.0- Labour: Renu pays up to $50 an hour for two hours if the owner cannot repair it
Better on warranty & supportBlueCube C1The whole system. $16,500Scores 7.0- Option: Insulated spa cover $13,199.00 at renutherapy.com
- Option: Extended chiller warranty $499.99 at renutherapy.com
Strengths
- Hot mode for heated soaks as well
- Touchscreen and app control
- Plugs into a standard household outlet
- Two-stage filtration with ozone
- Thick insulation holds the temperature
Drawbacks
- Insulated cover costs extra
- Its own pages give two minimum temperatures
- Only one year of warranty on the cooling unit
- Warranty repairs are mostly done by the buyer
- High price for a tub this size
- Uses a generic third-party app
A capable hot and cold tub with app control, at a steep price
Specs
- TypeRigid
- HeaterNot applicable
- FormTub
- PlacementIndoor or outdoor
- SeatsNot applicable
- Max TemperatureNot applicable
- Min Temperature38-41°F
- Capacity (Gallons)81-100 gal
- Chiller1/2 HP
- HeatsHeats to 100°F or more
- Water CareFilter, Ozone
- Power Supply120V plug-in (15A)
- EMF ClaimedNot applicable
- EMF MeasuredNot applicable
- CertificationsNone verifiable
- Warranty1 Year
At a glance
- 36 colour combinations
- Composite deck options
- Matching step stool
Renu Therapy LLC, founded in 2020 by William Bachand, is based in Costa Mesa, California, and owns the brand.
- Renu Therapy sells saunas and cold plunges in the US, from a two-person indoor cabin to an eight-person outdoor barrel.
- Its saunas and cold plunges are sold on its own US store at renutherapy.com, which ships them free to the contiguous US.
- That store also sells another company's infrared cabins.
- No Renu Therapy store or listing was found on Amazon US in November 2026.
The Renu Therapy Cold Stoic 3.0 is a hot and cold plunge tub with a 0.5 HP chiller and a 1 kW heater built into one body, in Meterous Black with a California Redwood deck. Renu prints 37°F on its page and cut sheet and 39°F elsewhere on the same page, and heats to 104°F.
It holds 95 gallons in a 40 by 25 by 31 inch tank inside a 70 by 33 by 35 inch body with 4 inches of perimeter insulation. A touchscreen and a Wi-Fi app control it, a two-stage filter with ozone keeps the water clean, and it plugs into a standard 120 V outlet through a GFCI plug.
It weighs about 365 lb dry and comes with a step stool and a basic tub lid; the insulated spa cover is a $400.00 option ($13,199.00). The tub carries five years and the chiller one year; an extended chiller warranty to five years costs $499.99.
Questions answered from our data
How much does a cold plunge cost?The 62 cold plunges we list run from $549 to $28,880, with a median of $7,495.
How cold does a cold plunge get?32 of the 62 cold plunges we list are rated to hold water at 37°F or colder, as their makers rate them.
How many gallons is a cold plunge?30 of the 62 cold plunges we list hold more than 100 gallons, as their makers rate them.
Does a cold plunge need a dedicated circuit?Seven of the 62 cold plunges we list ask for a dedicated circuit of 20 A or more, or a 240 V supply, as their makers state it.
