If you've decided you want a cold plunge tub at home, the hard part isn't the cold. It's choosing between a £200 inflatable tub and a £5,000 chilled cedar barrel when the product photos all look roughly the same. Here's how the decision actually breaks down.
Start with one question: will you chill it, or ice it?
This single choice determines most of your budget.
Ice-filled tubs are cheaper to buy and need no power. You fill them, add ice, and use them. The catch is ongoing: bags of ice cost money and require a trip, and the water warms over a session. A portable foldable ice bath tub is the entry point here — it packs away between uses, which matters if you're short on space.
Chilled tubs use a water chiller to hold a set temperature, so the tub is ready whenever you are with no ice at all. You pay more up front and you need a power socket nearby. An inflatable tub supplied with a chiller is usually the cheapest route into a chilled setup.
If you'll use it more than twice a week, most people end up wanting a chiller. Below that, ice is hard to beat on cost.
The three shapes you'll actually see
Inflatable and foldable tubs
Lightest and cheapest. They store flat, which makes them the obvious choice for a flat, a shared garden, or anyone not ready to commit. The trade-off is insulation — they lose temperature faster than a rigid tub, which matters more if you're icing than chilling. The 90cm inflatable pod is a typical size: deep enough to sit in with your shoulders under.
Wooden barrels
The permanent outdoor option. Insulated, good-looking, and built to stay where you put it. An insulated cold plunge barrel with a cover and ladder holds temperature far better than fabric, and the cover does real work — it keeps debris out and cold in between sessions. Think of it as garden furniture you use, and site it accordingly.
Chilled stainless tubs
The top of the range. A cedar and stainless steel tub with a 1.5HP chiller is a fixed installation: a stainless interior that's easy to keep clean, wrapped in cedar, with enough chiller capacity to pull the temperature down quickly rather than just maintaining it. This is the buy-once option.
Chiller capacity is the spec that matters
Chillers are rated in horsepower, and the number tells you how fast the unit can drop the water temperature — not just hold it. A smaller chiller paired with a large tub will maintain a temperature happily but take a long time to reach it from a fresh fill.
Match the chiller to the tub volume, and if you're running a larger or shared setup, look at commercial-capacity chillers rated for 1000L tubs. Many of these also heat, which turns an off-season plunge tub into something you'll still use in January.
Before you buy, check these four things
- Where the water goes. Draining is the step people forget. A tub you can't empty easily is a tub you'll stop maintaining.
- Power. Any chiller needs a socket it can safely reach outdoors. Budget for that if it isn't already there.
- Floor loading. Water weighs about a kilo a litre. A 400L tub is 400kg before you get in it — worth thinking about on a balcony or decking.
- How you'll know the temperature. Guessing defeats the point. A waterproof ice bath thermometer with a timer is the cheapest thing here and the one you'll use every session.
So which one?
If you're trying it out, buy a foldable tub and ice. If you know you'll use it regularly, go straight to a chiller — almost everyone who starts with ice ends up buying one anyway, and the ice bills add up faster than people expect. If it's going outdoors permanently and you care how it looks, buy the barrel.
The worst outcome is a tub that's slightly too much hassle to use, because then it doesn't get used at all. Choose for the version of the setup you'll actually maintain.
