Cold Plunge Chillers & Cooling Systems for Sale
A standalone chiller connects to any tub — a stock tank, a chest freezer conversion, a custom-built plunge or a spa — and turns it into a cold plunge that holds temperature without ice. Most units combine chiller, circulation pump, filter and ozone in one box with two hose connections.
Compare chiller capacity (HP or BTU) against the water volume you need to cool, the lowest temperature the unit can reach, whether it can also heat, pump flow rate and filter type. A 0.3 HP unit is fine for a 100-gallon insulated tub; larger or uninsulated tubs need 0.5–1 HP.
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More About Chillers & Cooling Systems
Chillers work by circulating tub water through a refrigeration heat exchanger and back. Installation takes minutes: place the unit near the tub, connect the inlet and outlet hoses, fill the system and set the temperature. Units with built-in ozone sanitation and a cartridge filter keep the water clean and reduce how often it needs to be changed.
For commercial facilities, a dual-purpose chiller/heater lets one tub serve as a cold plunge and, with a change of setting, a warm soak. Look for a digital controller with a wide range (37–104°F on some models), an accessible filter housing, and a weatherproof rating if the unit will sit outdoors.
Frequently Asked Questions
What size chiller do I need?
For an insulated 100–150 gallon tub with a cover, 0.3–0.5 HP is sufficient. Uninsulated stock tanks, outdoor placement or 200+ gallons call for 1 HP.
Can a chiller also heat the water?
Many models include a heating mode with a range up to about 104°F, making them suitable for contrast therapy or a warm soak.
Does the chiller need to run continuously?
It runs only to maintain the set temperature. With an insulated, covered tub it will cycle a few hours a day; the pump and ozone run continuously to keep the water clean.