The right tub depends on how often you will use it, where it will stand and how willing you are to manage ice. A chiller tub holds a set temperature but needs mains power and water care. An ice-cooled tub or inflatable costs less to start and asks more of you each session. This guide gives no prices because they change; for the spending picture see how much a cold plunge costs in Ireland.
The four main types compared
| Type | How it cools | Strengths | Trade-offs |
|---|---|---|---|
| Chiller tub (tub plus refrigeration unit) | Mains-powered chiller and pump, often with filter | Steady temperature, no ice routine, water can be kept for a period | Needs power and an outdoor-suitable supply; ongoing running cost; more to maintain |
| Insulated tub cooled with ice | Bagged or home-frozen ice added by hand | Simple, can be moved, no electrics | Ice supply, less control of temperature, water usually emptied after use |
| Barrel or wooden/plastic tub | Ice, or a chiller added separately | Often a compact footprint, can suit a garden setting | Check inner finish and sealing, size for your body, and how it drains |
| Inflatable tub | Ice, sometimes a chiller sold with it | Stores flat, usually the lowest entry cost | Durability, insulation and stability vary; check how it is filled and drained |
The categories overlap, and individual products differ a great deal. Use the table to decide which route suits you, then compare specific models on the checks below.
What to check before you buy
- Internal size and depth. You need to be seated with water covering your shoulders while keeping your head and neck out. Check internal dimensions against your height and any second user, not only the outer size.
- Capacity in litres. Larger volumes hold temperature better but take longer to cool, need more ice or chiller capacity and weigh more. One litre of water weighs about a kilogram, so a few hundred litres is several hundred kilograms before you add the tub.
- Rated power and plug type. Look for the chiller's rated wattage on the spec sheet or plate, and whether it works from a standard socket. This feeds directly into running costs.
- Stated cooling performance. Ask what temperature the chiller reaches, from what starting temperature, at what ambient temperature and for what volume. A claim without those conditions is not comparable.
- Filtration and water care. Check whether it has a filter, what sanitising method is supported, how filters are replaced and what they cost. Some owners empty and refill instead.
- Lid and insulation. A fitted lid reduces debris and helps temperature hold. A lid that locks also matters if children or pets are around.
- Drainage. Work out where hundreds of litres will go. A drain valve and a hose route to a suitable outlet save a lot of effort.
- Warranty, returns and service. Read the warranty terms, who services a chiller in Ireland, and the returns policy for large items. Check shipping to your address, including islands or rural delivery.
Electrics, siting and safety
Water and electricity do not mix, so treat the supply as part of the purchase. ESB Networks advises that permanent outdoor wiring must be installed by a registered electrical contractor, that pumps and garden equipment must be rated for outdoor use, and that you should use an RCD with equipment in the garden. Do not join flexes or improvise extension arrangements. If a chiller needs a dedicated outdoor supply, budget for an electrician.
Choose a level, firm base that can carry the full weight, with a clear path for access and a route for draining. Keep the tub away from overhead cables and trees that drop leaves. Check with your local authority, landlord or management company if the installation is fixed or large, since rules differ.
Safety features worth wanting
- A non-slip, stable step or entry point, so you are not climbing in with a shock response underway.
- A thermometer you can read at a glance, and a timer placed within sight.
- A lid that can be secured, particularly with children in the household. See kids and cold water.
- A dry, sheltered place to dress, with a robe and warm layers ready. See changing robes and post-swim kit.
Think about the surroundings too. A tub on a patio under a bedroom window will be heard if the chiller or pump hums at night, and a tub close to a boundary may raise questions with neighbours. Place it where you can step out into a sheltered, dry area and where the path from the house is not icy in winter.
A tub does not remove cold shock. Keep your head and neck out of the water, never use it alone if you have any health concern, and read who should not do cold water immersion first.
How to compare listings
Compare like with like. Convert any claims to the same basis: litres, rated watts, stated lowest temperature and the conditions for that figure, delivery cost, filter replacement cost and warranty length. Be sceptical of reviews you cannot verify, and of figures written for the US market that may assume different voltage, plugs or standards. Confirm the plug and voltage are suitable for Ireland before you order.
If you have not done cold immersion regularly, a few weeks of cold baths with ice can show if you will use a tub before you spend on a chiller. Start with the setup guide and the temperature and duration guide.
Frequently asked questions
Do I need an electrician for a chiller tub?
Check the product's power needs. ESB Networks says permanent outdoor wiring must be installed by a registered electrical contractor.
What size tub do I need?
Enough that your shoulders are covered while your head and neck stay out. Compare internal dimensions with your height, not the outer size.
Are inflatable tubs any good?
They suit a trial run or limited space, but durability and insulation vary. Check reviews and the returns policy before you buy.
What should I ask before buying a chiller?
Ask what lowest temperature it reaches, for what volume and at what air temperature, plus its rated watts and filter costs.