Cold plunges and chillers
A cold plunge is a tub, a lid and (usually) a chiller. Compare them by the things that decide comfort and cost: water volume, insulation, the chiller's cooling output and the lowest temperature it holds.
Updated Oct 17, 2026
Plan it with real numbers
- CalculatorChiller sizeChiller size, pull-down time and daily kWh for your tub and room.
- CalculatorPlunge costChiller versus ice: what holding your plunge cold costs per month.
- CalculatorIce bath calculatorKilograms and bags of ice for your bath, from your tap water.
- GuideDIY cold plungeChest freezer, stock tank or barrel: heat gain, ice per day and chiller size compared.
- GuideCold plunge temperatureWhat research used, time versus temperature, and the cost of each degree.
- CalculatorContrast timerHot, cold and rest rounds with cues.
- GuidePlunge vs ice bathSame cold water; the difference is how you keep it cold.
- GuideCold plunge benefitsSoreness, strength training, winter swimmers and cold showers: the evidence.