Ice Bath Chillers.
Standalone chiller units that pair with most ice baths and cold plunge pools. 1/4 hp to 1/2 hp capacity, with UV or ozone sanitation, circulation pump and thermostat to roughly 3°C.
Ice bath chillers, sized for UK conditions.
An ice bath chiller is a refrigeration unit, a circulation pump and (usually) an inline sanitation stage in one outdoor-rated housing. Water leaves the tub via a side-wall fitting, passes through the heat exchanger where it is cooled, passes through the UV-C or ozone treatment, and returns to the tub. The chiller's thermostat governs the cycle: when water reaches the set point, the compressor pauses; as ambient warms it back up, the compressor resumes.
Sizing matters more than brand. A 1/4 hp chiller will hold 200–400 litres at 8°C in normal UK conditions. A 1/3 hp moves you to 400–700 litres or down to 5°C in the smaller volume. A 1/2 hp covers 700–1,000 litres or sustained sub-5°C operation. Undersized chillers run continuously, drawing more power and shortening compressor life; correctly sized chillers cycle on and off and last ten to fifteen years.
Practical specifications to check: noise rating at 1 m (under 55 dB is reasonable, under 50 dB is good), ambient operating range (the chiller should function from -5°C to 40°C ambient), refrigerant type (R290 is the modern standard with low global warming potential), and the included pump's flow rate (5–15 L/min is typical). Inlet and outlet fittings should be standard 1.5-inch BSP for compatibility with most tubs. UV-C bulb life and replacement cost is worth knowing before purchase.
Asked & answered.
The questions we get most about ice bath chillers. Anything missing, the phone is the quickest way through.
What size chiller do I need?
1/4 hp for 200–400 litres at 8°C. 1/3 hp for 400–700 litres or 5°C in smaller volumes. 1/2 hp for 700–1,000 litres or sustained sub-5°C. Insulation level and ambient temperature affect the calculation; manufacturers usually publish a sizing chart.
Is the chiller hard-wired or plug-and-play?
Most domestic chillers up to 1/2 hp are plug-and-play on a UK 13A socket. Some 1/2 hp and all 3/4 hp+ units require a 16A circuit, which an electrician fits as a dedicated spur. Always check the chiller's rated draw (in amps, not watts) against your available socket.
UV-C, ozone, or both?
UV-C lamps inactivate microorganisms as water passes the lamp — proven, well-understood, requires annual bulb replacement. Ozone generators dose the water with ozone gas which oxidises organics — equally effective, replacement cells last two to three years. Both is the gold standard but UV-C alone is sufficient for most household installations.
Will it work with my existing tub?
If the tub has standard 1.5-inch BSP inlet and outlet fittings, yes — every chiller in our range uses the same connection standard. Tubs without fittings can be retrofitted in most cases by a competent installer; some inflatable tubs accept hose-barb adapters that thread through the wall fabric.
How long does a chiller last?
Quality units running properly sized loads last ten to fifteen years before requiring a major service or replacement. The compressor is the longest-lived component when not overworked. Pumps and circulation gaskets are the parts most likely to need replacement first, around year five to seven.