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.