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The Cold Plunge, Built In

Hydro Chill by Hydro Systems

Mark Quesada · October 29, 2026

The Cold Plunge, Built In

Photo: courtesy of Hydro Systems

The cold plunge has mostly lived outdoors, a stock tank or a stand-alone tub at the edge of the patio. With its September announcement, Hydro Systems brings the plunge into the bath. Hydro Chill can be added to virtually any tub in the company's range, whether freestanding, alcove or drop-in.

The new generation cools faster, runs more quietly and uses energy more efficiently. It also needs less mechanical space, and an integrated recirculating pump makes installation simpler. Hydro Ozone keeps the water clean with UV and ozone. Hydro Chill Ultra goes further: it is a self-contained system for both hot and cold water therapy. The cold plunge can also be paired with the brand's whirlpool, thermal air bath and chromatherapy options.

The companion app lets an owner turn the system on and set the temperature from anywhere. "The idea of connecting to disconnect is, perhaps, an oxymoron, but that's exactly what modern wellness is all about," says Ashley Steinhardt, Vice President of Sales. Every tub is manufactured in the United States.

Read the announcement →