Chilling water once is easy. Holding 8 °C through a 32 °C afternoon with four users an hour needs an oversized chiller and a genuinely insulated vessel, which is where most imported plunges fail here.
We size the chiller from your peak hour and put it somewhere it can reject heat — never inside the wet room.
What to specify
- Temperature
- 8–12 °C for regular use
- Recovery
- About 0.6 °C per user
- Insulation
- 50 mm closed-cell, plus a lid
- Filtration
- 20 µm cartridge with UV
- Circuit
- Dedicated — never shared with the sauna
What actually decides it
- 01
Place it beside the heat
Contrast therapy only works as a circuit. Four steps from the sauna door is the target; fifteen and people stop using it.
- 02
The chiller rejects heat somewhere
In an enclosed cupboard that means 200 m³/h of extract. Outside is better, and quieter.
- 03
Colder is not better
Below 6 °C usage drops and the chiller runs near-continuous. 8–12 °C suits almost everyone.
Questions
- How cold should a plunge be?
- 8–12 °C for most people and most memberships. Below 6 °C is a specialist request and costs materially more to hold.
- How much maintenance does a plunge need?
- Cartridge every four to eight weeks, a water change quarterly at home or monthly commercially, and a condenser clean every quarter.
- Can a plunge go on a terrace?
- Yes, with a structural check — a filled plunge is around 620 kg — and a chiller position that can breathe.
Tell us the room.
Dimensions, the supply you have, and what you want to happen in it. We will come back with a system list and an indicative budget.