Renu Therapy
Hot and cold in one overbuilt tank.
What they're known for
A 37–104°F plunge built like equipment, not a toy — chiller, heater, ozone, and four inches of insulation in one tank.
Renu Therapy builds plunges the way commercial kitchens build refrigeration: heavy insulation, real filtration, controls you can trust without babysitting. The Cold Stoic 3.0 runs a built-in half-horsepower chiller and heater across a 37–104°F range, which makes it a cold plunge and a hot soak in the same footprint. Dual-stage filtration with ozone, four inches of insulation, touchscreen and app control, and tank finishes you pick yourself.
The hot-cold range is the quiet differentiator. Contrast work usually means owning two vessels or negotiating with a bathtub; one tank that does 40°F mornings and 104°F evenings collapses the whole setup. From $11,399 — priced like the last plunge you buy, which is the point.
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