Inergize is the cold plunge brand of Inergize Health, a San Diego company founded in 2022 by mechanical engineer Ciaran Flanagan out of a local cold plunge community he built before launching the product line. It has since shipped more than 5,000 units and built an in-house engineering and support team, one of the longer-running dedicated cold-tub companies in the US.

The Elite Tub is the flagship: an insulated drop-stitch tub paired with a standalone chiller that runs from 37 to 104 degrees Fahrenheit, so the same unit handles a cold plunge or a warm soak. A quad-filtration system, ozone, a 20-micron filter, a strainer, and air filtration, keeps the water clear between fills, and built-in wheels make it easy to move or store.

Ellara carries Inergize for that combination, a company that has built and supported cold plunges at scale, backed by a one-year warranty and a San Diego team that handles repairs directly.