A home cold plunge is a much smaller commitment than a sauna, and in an Irish winter a tub of water left outside gets cold enough on its own. Here are the realistic options.
The three main options
- Inflatable or freestanding tubs with no chiller: the cheapest way in. You rely on the weather, bags of ice, or both. Fine from roughly October to April, not much use in summer.
- Tubs with a chiller unit: a pump cools and usually filters the water to a set temperature year-round. Considerably more expensive, but it's the option most people end up wanting.
- Chest freezer conversions: popular online and cheaper than a chiller, but this means mixing water and mains electricity in a way the freezer was never designed for. We don't recommend it.
Electrical safety
Anything electrical near a tub of water should be on an outdoor-rated socket protected by an RCD, and any new circuit should be installed by a registered electrician. If a product's safety approvals and outdoor rating aren't clearly stated, walk away.
Keeping it clean
Standing water goes stale quickly. A cover, a filter, and regular water changes or a sanitiser recommended by the manufacturer are the difference between a plunge you look forward to and one you avoid.
How cold should it be?
Somewhere between about 5 and 12°C suits most people. Colder isn't better, and very cold water for long periods has real risks. Keep sessions short. A minute or two is plenty.
Before you buy
- Measure where it will go, and check the ground can take the weight of a full tub.
- Check how long the chiller takes to bring the water down after a top-up.
- Ask about running costs. A chiller working hard in summer uses real electricity.
- Check the warranty and whether parts and service are available in Ireland.