Cold plunge
Cold Stoic 3.0
The iconic dual-temp flagship. Cold and heat, 37 to 104°F.
From $12,799
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Cold Stoic 3.0 at home
Cold recovery that fits into your everyday routine.
Part of the ritual
A plunge you will want to step into, morning or night.
5-year limited warranty
Handcrafted in California and built to last for years.
Thick-wall insulation
Foam walls and an insulated cover hold temperature in any climate.
Hot and cold in one
Runs 37 to 104 degrees, for cold plunge and warm contrast.
Control it from your phone
A touchscreen and app over Wi-Fi, with programmable lighting.
Real wood or composite
A breathwork-ready deck in real wood or durable composite.
Thirty-six combinations
Mix base and deck colors into thirty-six finish combinations.
Dual-stage filtration
An external and internal filter catch debris and fine particles.
Simple filter care
Rinse or replace the filter on a simple rhythm to keep the water clear.
Cleaner, longer
Ozone and dual-stage filtration keep water clear with less effort.
No plumbing to install
Fill and drain with a standard garden hose, no plumber needed.
Plug in and go
Into a standard GFCI outlet, set your temperature, and you are ready.
Insulated spa cover
Add the insulated cover to hold your temperature and keep the water clean.
Fits the space
A 70-inch footprint that settles into most rooms and patios.
Antique Mahogany
Deep red-brown composite that holds its color.
Brazilian Walnut
Dark chocolate grain, the heaviest of the six.
California Redwood
Warm red tone that silvers gently outdoors.
Driftwood Grey
Weathered grey from day one.
Natural Teak
Golden and even, the warmest of the greys.
Pacific Cedar
Pale and aromatic, the classic sauna timber.
Cold Stoic 3.0
$12,799
Built for performance.
Engineered to last.
Specifications and dimensions
Specifications and dimensions
Dimensions
Outside Tank 70” × 33” × 35”
Inside Step 40” × 25” × 31”
Connectivity
App connected
Touch screen
Weight
Empty ~365 lbs
Filled ~1,155 lbs
Water capacity
Filled 95 gallons
Max 134 gallons
Power
Cooling 518 watts
Heating 1013 watts
Standard 120V GFCI outlet
Noise level
58 dB from ~3 ft
Dimensions
Outside Tank 70” × 33” × 35”
Inside Step 40” × 25” × 31”
Connectivity
App connected
Touch screen
Weight
Empty ~365 lbs
Filled ~1,155 lbs
Water capacity
Filled 95 gallons
Max 134 gallons
Power
Cooling 518 watts
Heating 1013 watts
Standard 120V GFCI outlet
Noise level
58 dB from ~3 ft
Effortless ownership
and thoughtful features
Dual filtration
Cleaner water, less effort
External and internal filtration capture debris and micro-particles, with tool-free filter swaps for easy upkeep.
Ozone purification
Naturally clean, naturally simple
An integrated ozone generator reduces bacteria and organics naturally, keeping water fresh with minimal chemicals.
Technology
Smart control, anywhere
Adjust temperature, switch modes, and set ambient lighting from the touchscreen or mobile app over Wi-Fi.
Performance
Serious performance, built to endure
From 37°F to 104°F, a quiet 0.5 HP chiller and thick-wall insulation hold steady temps year-round.
Design
Minimal upkeep, maximum presence
Real wood or composite decks, 36 color combinations, and a discreet mechanics bay that hides components.
Demand more from your recovery.
Most plunges cut corners on design, performance, and support. Renu doesn’t. If you’ve been hunting for a plunge that checks every box, this is the one.
The most reliable
cold plunge on the planet
5 year
Warranty
Built for years of reliable, backed by a comprehensive warranty for peace of mind.
Real support
5 star customer support rating
Human based, responsive support that's expert guidance when you need it most.
Handcrafted
In California
Handcrafted using real, premium materials and built with meticulous attention to detail.
Cold Stoic 3.0
Designed by you. Built by us.
Plunge colors
Deck colors
Not sure which is right for you? Find your match.
How you like to take the cold, cold only or hot and cold, and how much room you want. We point you to the plunge that fits.
Question 1 / 5
How do you like to take the cold?
Question 2 / 5
Just cold, or cold and heat in one?
Question 3 / 5
How much room do you want inside?
Question 4 / 5
Which style fits you?
Question 5 / 5
What matters more?
Reveal match
5-STAR REVIEWS
8,000+ TRUSTED CUSTOMERS
Cold Stoic 3.0
Love my Cold Stoic
Isaiah Mustafa
Cold Stoic 3.0
Easy and convenient
LEWIS HOWES
Cold Stoic 3.0
Super reliable
Stephen Amell
5-STAR REVIEWS
8,000+ TRUSTED CUSTOMERS
Cold Stoic 3.0
Love my Cold Stoic
Isaiah Mustafa
Cold Stoic 3.0
Easy and convenient
LEWIS HOWES
Cold Stoic 3.0
Super reliable
Stephen Amell
Frequently asked questions
100%would recommend these products
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149 reviews
- JCJordan C.Verified BuyerReviewingCold Stoic 2.0I recommend this productRated 5 out of 5 stars1 year agoLove my cold plunge.
Easy to install and set up. Looks just like the pictures on the website. Sound of the chillier and pump are whisper quiet compared to some of the other cold plunges I have tried. Water stays clean and clear. Highly recommend this product.
- MMMatt M.Verified BuyerReviewingCold Stoic 3.0I recommend this productRated 5 out of 5 stars1 year agoFantastic!
Awesome cold tank, as advertised. Easy to operate and maintain and great customer service!
- EREarl R.Verified BuyerReviewingCold Stoic 3.0I recommend this productRated 5 out of 5 stars1 year agoVery Happy Customer
I bought a cheap cold plunge a couple years ago to see if I would really like it. I found out that the health and how you feel benefits exceeded my expectations. So when I remodeled my spa area I did a lot of research and came down to two. A buddy bought brand X and had a ton of issues the support was some of the worst customer service I had even seen. So I decided on RENU and super happy I did. It is very well built, runs quiet, easy to operate controls, the list goes on! We will see how support is in the future, what I can say 6 weeks into owning the RENU is I LOVE it, not the lowest cost but so far worth the small extra to own a quality product.
RTRenu Therapy1 year agoHi Mike,
Thanks for the awesome review and photos! We’re so glad you’re loving your RENU and that it’s been a great upgrade for your spa. We’re here anytime you need us! Welcome to the RENU family!
- BBillVerified ReviewerReviewingCold Stoic 2.0I recommend this productRated 5 out of 5 stars1 year agoFive Stars Despite a Few Minor Quirks
I’ve been using the Cold Stoic 2.0 for a while now and it's a game changer. Self-contained, no need to haul/buy ice, and easy to care for. Looks great beside my sauna, too!
One thing that really improves convenience is having it plugged into a WEMO switch, so I can control it from my phone, making turning it on or off a lot easier, especially when I want to keep things quiet during a gathering.
Speaking of that, there are a couple of minor downsides. The filter is a little awkward to place, and, as mentioned above, the unit runs at around 55 dB — like a dishwasher. Just annoying enough that I will turn it off if we’re hanging out nearby. Those are nitpicks, and in no way worthy of downgrading.
It’s been a solid purchase and easily deserves 5 stars.
If I could give 10 stars for customer service, I'd do it.
- CRChuck R.Verified BuyerReviewingCold Stoic 3.0I recommend this productRated 5 out of 5 stars1 year agoLife Changing
The Cold Stoic 3.0 isn’t just a cold plunge — it’s a life upgrade. This thing has become my daily ritual, my reset button, and my secret weapon for mental clarity, stress resilience, and physical recovery.
Form meets function in all the right ways. The design is sleek and solid — no cheap plastics or gimmicks. It looks sharp enough to show off and performs like a workhorse. Clean lines, easy to drain and maintain, and stays cold consistently. Like, ice-in-your-veins cold.
What really makes it a game-changer though is how it fits seamlessly into my routine. Whether I’m doing Wim Hof breathing beforehand or just jumping in after a grind of a workday, the 3.0 delivers — every time. The cold hits, the mind clears, and the body snaps into gear. It’s better than coffee, therapy, and meditation rolled into one.
I’ve been using it daily and honestly, it’s non-negotiable now. Traveling? I miss it. That’s how you know it’s more than a product — it’s a lifestyle enhancer.
If you’re looking to level up physically, mentally, or just reclaim your edge — stop looking. Cold Stoic 3.0 is the real deal.