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Cold Plunge: Chiller vs Ice
Ice is cheap to start and expensive forever. A chiller is the reverse. Here is where the lines cross.
Both get you cold water. The question is what you pay in money and hassle to stay there.
Ice
Zero equipment cost, just a tub and bags of ice. But a single plunge can swallow 20–40 lb of ice, and it melts, so every session is a trip to the store and a recurring cost. You also cannot hold a precise temperature; you get whatever the melt gives you. Fine for trying the habit, painful as a daily routine.
Chiller
A chiller is upfront money for near-zero marginal cost. It holds an exact set temperature on demand, runs on standard power, and with filtration and ozone keeps the same water clean for weeks. Running cost is modest, often under $10 a month for a covered, insulated tub, and you can estimate it precisely in the chiller calculator.
Where the lines cross
If you plunge a few times a month, ice may never cost enough to justify the hardware. Plunge several times a week and the ice bill plus the errands overtake a chiller within months, and the chiller wins on convenience from day one. Size the chiller to your tub volume first, an undersized unit never reaches temperature; the calculator gives the BTU/hr and HP you need.
FAQ
Is a cold plunge chiller worth it over ice?
If you plunge more than a few times a month, yes. Ice is cheap to start but a recurring cost and errand; a chiller is upfront money then near-zero per session, holds an exact temperature, and keeps the same water for weeks with filtration.
How much does it cost to run a cold plunge chiller?
Often under $10 a month for a covered, insulated tub, though it depends on volume, target temperature and climate. Estimate yours in the chiller calculator.