Cold Plunge Buying Guide: Tubs, Chillers and What to Look For
Round or rectangular? Portable or permanent? Built-in chiller or separate? Here is a clear, no-hype guide to choosing a cold plunge for your home, gym or spa.
- A chiller keeps the water cold and clean without you buying ice every day, which is what makes a plunge sustainable.
- Round tubs save space; rectangular tubs give you room to stretch out and share the space.
- Filtration and a safe drain are not optional extras. They keep the water healthy and the tub safe.
- Plan the electricity, drainage and floor strength before you choose the tub.
Illustration of a cold plunge tub filled with ice-cold water beside its chiller unit
Why a chiller changes everything
Anyone can fill a tub with ice. Almost nobody keeps doing it. Buying, hauling and melting ice every few days turns a good habit into a chore, and the water gets cloudy.
A cold plunge with a built-in or paired chiller solves this. It holds the water at a set temperature, circulates it through a filter and lets you step in whenever you like. That convenience is the reason people stick with it.
Round or rectangular?
The Arctic Ring is a round, single-person plunge, 90 cm across and 75 cm high, with a 304 stainless steel interior, a 0.8 HP chiller and filtration that cools the water down to 3 °C. It is the compact choice for a gym corner, a courtyard or a studio treatment room.
The Arctic Tub is a full-size one-piece composite tub, 170 × 80 cm, available in 421 L and 483 L capacities, with two-stage filtration, patented water nozzles and a VGB safety-certified drain, paired with a high-power chiller. It suits people who want to stretch out, and venues where more than one person might use it.
If you move house often, run pop-up events or have no permanent spot, the Arctic Fold is our portable, foldable option.
Features that actually matter
Ask the seller what the chiller does in your climate. A unit that holds 3 °C in a cool room may work harder on a hot terrace, so tell them where it will sit.
Plan the space before you buy
Water is heavy. A filled full-size tub can weigh around half a tonne, so check the floor, and think about where water drains when you empty it. You will also need a suitable power supply for the chiller.
Think about the whole routine too. Cold works best as part of a flow, which is why many buyers place it next to a sauna, as we explain in our contrast therapy guide. Our sauna planning guide has layout ideas that apply to a plunge as well.
Temperature and time: how cold, how long?
This is the question everyone asks, and the honest answer is that it depends on you. Our plunges can chill the water as low as 3 °C, but you do not have to run it that cold. Many people start in a milder range and work down as they get used to it.
Start with short dips, enter slowly, breathe calmly and get out if you feel unwell. A short, pleasant dip is better than an endurance test. Always follow the guidance of a medical professional, especially if you have a heart or circulation condition.
Warm up gradually afterwards. A sauna is a popular follow-up, and our contrast therapy guide explains how to string the two together.
Set the chiller a few degrees warmer than the maximum it can achieve. It runs less hard, uses less power and you keep room to go colder when you want to.
Home or commercial: what changes?
At home, one or two people use the plunge, so water care is light and a compact Arctic Ring may be all you need. In a business, usage multiplies, so you need stronger filtration, a clear cleaning schedule, safe access and staff training.
The Arctic Tub is built with commercial thinking in mind: two-stage filtration, patented nozzles, a VGB safety-certified drain and a high-power chiller. If you are planning a venue, read how to start a recovery lounge and our water-care guide.
Portable plunges like the Arctic Fold suit events and flexible spaces, but permanent venues should usually install a fixed, filtered tub.
What it costs to run
Running costs come from electricity for the chiller and pump, water and treatment, and maintenance. A well-insulated tub with a cover wastes less energy, because the chiller does not fight the sun and the air all day. Keep the unit ventilated and clean for efficiency.
Ask your supplier for the power rating and an idea of daily consumption in your climate. For a business, include these numbers in your plan, and review the installation and support guide to avoid surprises.
And then keep it clean
Water care is the unglamorous part of owning a plunge, and doing it right saves you money and keeps the water pleasant. We have written a short, practical guide: cold plunge water care and chiller maintenance.
Curious how a plunge compares with a cryosauna? See cryotherapy vs ice bath. And if you are building a commercial space, browse our combos or talk to the team about Recover & Restore fit-outs. You can also browse the full cold & cryo range.
One important note: cold immersion is not for everyone. If you have a heart or circulation condition, or you are unsure, check with a medical professional first.
Frequently asked questions
How cold can a cold plunge get?
The Arctic Ring's built-in 0.8 HP chiller can cool the water to 3 °C (37.4 °F). You can set it warmer if you prefer, and many beginners do.
Do I need a chiller, or can I just use ice?
You can use ice, but it is expensive, labour-intensive and hard to keep consistent. A chiller holds the temperature and filters the water, which is why most regular users choose one.
Can I use a cold plunge outdoors?
Some models can. The Arctic Ring is suitable for indoor or outdoor installation. Check the rating for your unit, protect electrical connections from rain and consider shade.
Is a cold plunge safe for everyone?
No. Cold-water immersion is not suitable for everyone, especially people with heart or circulation conditions. Speak to your doctor before starting and always enter slowly.
How heavy is a filled plunge?
A full-size tub holds hundreds of litres (the Arctic Tub is 421 or 483 L), and water weighs about a kilo per litre, so plan for a strong, level floor and check with a builder if unsure.
Arctic Ring Cold Plunge (Round, Single Person)
Compact round plunge with built-in 0.8 HP chiller and filtration.
Arctic Tub Cold Plunge Ice Bath Tub
Full-size composite tub with two-stage filtration and safe drain.
Arctic Fold Portable Foldable Cold Plunge
Portable, foldable cold plunge for flexible spaces.
Planning a recovery suite or commercial wellness facility?
GreenPulse provides space layout planning, product selection, electrical planning, installation and team training for your space.
Related Perspectives
Contrast Therapy: How to Pair an Infrared Sauna with a Cold Plunge
Heat, then cold, then rest. Here is how to build a simple contrast routine at home or in a studio, with timings, order and the common mistakes to avoid.
Cold Plunge Water Care and Chiller Maintenance, Made Simple
Clear water, a healthy chiller and a tub you are happy to step into. A friendly maintenance routine for home owners and facility managers.
Cryotherapy vs Ice Bath: What's the Difference and Which Suits You?
A whole-body cryosauna and a cold plunge both use cold, but they feel and work very differently. Here is how they compare on experience, space, running costs and who they suit.