Renu Therapy - Cold Stoic 2.0
The cedar-wrapped premium reference, built like a Japanese onsen.
A cedar-wrapped horizontal plunge with an acrylic tank that chills to a manufacturer-stated 39°F and holds it forever - the closest production unit to a custom onsen.
Price: $9,499–$10,019 · Verified: 2026-07-17 · Editor score: 9.1/10 (how we rank)
A cedar-wrapped horizontal plunge with an acrylic tank that chills to a manufacturer-stated 39°F and holds it forever - the closest production unit to a custom onsen.
If The Plunge is the Toyota of cold plunges, the Renu Cold Stoic 2.0 is the Lexus LX. Same chillered category, completely different conversation. Acrylic tank with optional cedar deck and lid trim, horizontal full-body immersion, a manufacturer-stated 39°F floor, 60-month tub warranty, and a presence in a room that other tubs simply don't have.
It's also the priciest pick in this set at $9,499. For a buyer making a single five-figure decision on home recovery infrastructure, that math can absolutely work - but only if the cedar aesthetic and the premium build actually matter to you. If they don't, you're paying for jewelry.
The service network is smaller than Plunge's, the 320lb empty weight means you need to think about indoor floor loading, and the cedar trim requires periodic re-treatment outdoors. None of those should disqualify a serious buyer; all of them should be priced into your decision.
Premium-aesthetics buyers who want the longest warranty in the category and a tub that reads as architecture.
You're budget-constrained, want apartment-friendly install, or don't care about premium materials.
Pros
- Manufacturer-stated 39°F floor with continuous chiller hold
- 60-month tub warranty (industry-leading)
- Cedar deck and lid trim - premium aesthetic, naturally antimicrobial
- Horizontal full-body immersion
- Made in USA
Cons
- Priciest pick in this set at $9,499
- Heavy (320lb empty) - floor loading matters
- Cedar trim requires periodic re-treatment outdoors
- Smaller service network than Plunge
Specifications
Most often compared with
Where this fits
Renu Therapy Cold Stoic 2.0 cross-shops across several editorial surfaces on this site: the full brand catalog, the buyer-intent tags this item carries and the in-depth guides for its category.
Renu Therapy Cold Stoic 2.0 - buyer FAQ
Renu Cold Stoic 2.0 vs The Plunge - which one should I buy?
Two different purchases. The Plunge at ~$5-7K is the safe default with the largest service network and a 37°F floor. Renu Cold Stoic 2.0 at $9,499 is the cedar-wrapped premium reference with a manufacturer-stated 39°F floor and a 60-month tub warranty. If you want the safest single-purchase, Plunge. If cedar aesthetics and a premium warranty justify the higher price for your buyer profile, Renu.
What is the Cold Stoic 2.0 minimum temperature?
Renu states a 39°F floor, which the continuous chiller holds year-round. The cold-exposure protocol research (Huberman, Søberg) clusters around 50-59°F as the threshold for autonomic activation, so 39°F is plenty cold for the typical 2-5 minute session. For most longevity readers, the cedar aesthetics and warranty are the reasons to choose this tub, not a chase for benchmark-low temperatures.
How much maintenance does the cedar trim require?
Annual exterior re-treatment if outdoors (cedar sealer, ~$30-60 in product + 1-2 hours of work) on the cedar deck and lid trim. Indoor installations don't require treatment. Cedar is naturally antimicrobial and rot-resistant, so neglected trim weathers rather than fails structurally - it just looks worse over time. Water chemistry maintenance is the same as any chillered tub (UV-C + filter, water change every 4-6 weeks).
Does the 320 lb empty weight cause floor problems?
Filled (water + tank + chiller + user), the Cold Stoic 2.0 runs ~1,200-1,400 lb on a 25 sq ft footprint = ~50-60 psf. Standard residential floors handle this fine on the ground floor or basements. Second-story installations need an engineer to verify floor joist capacity - some old joist systems max at 40 psf live load. If installing on a second floor, get a structural sign-off before committing.
Is the warranty really 60 months?
On the tub itself: yes, 60 months (5 years) - industry-leading. The chiller component is covered separately at 36 months (3 years) which is still longer than most competitors. Renu has the deepest warranty stack in the category. Service network is smaller than Plunge's, so warranty claims may take longer to resolve - but the coverage breadth is real.