Cold plunges have gone from athlete equipment to a backyard and garage staple. The category now runs from $100 soft-sided tubs you fill with ice to $14,000 chiller systems that hold 37°F around the clock.
This guide covers the decisions specific to integrated-chiller cold plunges, in order. Each section has its own deeper article on the site. If you’d rather start with a simple tub and ice, the ice bath buying guide covers that end of the market.
Short answer: decide between a chiller and ice first, then whether you also want hot water, then check the circuit, the warranty on the chiller, and where the tub will sit.
Chiller or ice
This decision drives the budget. A chiller holds the water cold for you and filters it; ice is cheap upfront but has to be bought or made for every session. The Plunge’s Original cools to 37°F at 8–10°F an hour; a chiller-free ice bath relies on how much ice you add.
Cold-only or hot-and-cold
Some tubs also heat. The Nordic Wave Viking Premier runs from 35°F to 104°F, and the Renu Cold Stoic 3.0 from 37°F to 104°F. Others stay cold-only, like the Renu Siberian Pro with its 0.8 HP chiller.
Tub construction
Shells range from acrylic and fiberglass (The Plunge Original) to recycled rotomolded plastic with R-16 foam (Ice Barrel 500) and cedar skirts over aluminum or HDPE liners (Dundalk Polar). Insulation thickness is published for some: 4 inches of foam on the Cold Stoic 2.0, 3 inches on the Siberian Pro.
Noise
Chillers hum. Renu rates the Cold Stoic 2.0 and Vero at 58 dB from about 3 feet, just under normal conversation, which the American Academy of Audiology puts at 60 dB.
Warranty
Here’s what the spec sheet won’t tell you upfront: tubs and chillers are often covered differently. The Viking Premier carries 5 years on the tub and 1 year on the chiller; The Plunge Original has a 1-year limited warranty overall; the Cold Stoic 2.0 has 5 years.
Weight, placement, and power
A filled tub is heavy. Renu puts the Cold Stoic 3.0 at about 1,155 lbs filled, so check your floor before an indoor install. Most chiller tubs run on a 120V/15A circuit, usually dedicated.
Your first sessions
Cleveland Clinic recommends beginners start at 50–59°F for a minute or two, never go below 40°F, and never stay in longer than five minutes. It advises avoiding cold plunges with heart disease, high blood pressure, diabetes, pregnancy, peripheral neuropathy, poor circulation, venous stasis, or cold agglutinin disease.
Buying checklist
- Chiller or ice? If a chiller, what’s its HP and lowest temperature?
- Cold-only, or hot and cold?
- What circuit does it need, and is your outlet dedicated?
- What’s the warranty on the tub, and separately on the chiller?
- How much does it weigh filled, and can your floor take it?
- Is the chiller’s noise rating published?
- What filtration and sanitation does it use, and what do replacement filters cost?
Shortlisting a model
Our cold plunge comparison puts four chiller tubs side by side on price, warranty, and ratings. For covers, filters, and water care, see the cold plunge accessories buying guide.
Bottom line: the chiller decides the price, the warranty decides the long-term cost, and the temperature you need is warmer than most marketing suggests.
Sources
- Cleveland Clinic, “Are ‘Cold Plunge’ Ice Baths Good for You?” May 8, 2026: health.clevelandclinic.org
- American Academy of Audiology, “Levels of Noise in Decibels (dB),” September 2023: audiology.org
- Product specifications, power, warranties, and prices: The Plunge, Renu Therapy, Nordic Wave, Ice Barrel, and Dundalk listings, checked September–October 2026