The Smartest Cold Plunge in Home Wellness.

Can be included with other tub options

No chemicals

HydrOzone UV Sanitized Fresh, Pure Water

Power on remotely, set exact temperatures from smartphone

Connect to disconnect with Hydro Chill, the next generation of smart cold plunge technology for your home.

Wellness is deeply personal, and the technology behind it should be too. The next-generation Hydro Chill system fuses Hydro Systems’ award-winning hydrotherapy technology with one-of-a-kind smart home automation. Program your ideal plunge from anywhere, experience faster whisper-quiet cooling, and elevate your recovery ritual with a streamlined profile that fits seamlessly into your space.

You can even transform your tub into both a hot and cold plunge with Hydro Chill Ultra.

What is Cold Water Therapy

Cold water therapy is the practice of immersing the body in water cooled to 59°F (15°C) or below for brief periods. Cultures across the globe—from ancient Roman baths to Scandinavian winter dips—have turned to cold hydrotherapy for millennia to build resilience, invigorate the body, and restore vitality.

Even brief exposure to cold water triggers a powerful physiological response.* It is known to constrict blood vessels to reduce pain and inflammation, speeds muscle and joint recovery, stimulates circulation, and sharpens mental clarity.

For centuries, practicing cold therapy meant relying on natural bodies of ice-cold water or heavy bags of ice. Hydro Systems modernized that ancient practice by seamlessly integrating high-performance cold plunge technology in residential bathtub designs—an innovation recognized with a prestigious GOOD DESIGN® Award. Now, with the next-generation Hydro Chill, reaching temperatures down to 37°F is as effortless as tapping an app on your phone. Whether you are following the Wim Hof Method or recovering from an intense workout, you can rejuvenate your body and mind in under five minutes.

* Safety Note: Extended exposure to extreme cold temperatures carries a risk of hypothermia. Always consult your healthcare provider before beginning any new thermal therapy regimen.

WHAT’S NEW: THE NEXT-GENERATION HYDRO CHILL

Smarter, faster, quieter, and easier to install. Discover how the latest Hydro Chill features help transform your everyday cold plunge ritual:

Smart App & Keypad Control
Power on remotely, set exact temperatures down to 37°F, or schedule daily plunges directly from your smartphone or optional digital keypad.

Rapid, Energy-Efficient Cooling
Reaches and maintains target temperatures faster while drawing less power than previous generations.

Whisper-Quiet Operation
Advanced sound dampening preserves the peaceful, meditative sanctuary of your bath space.

Integrated Recirculating Pump
Built directly into the unit for a simplified single-point connection—eliminating external control boxes and extra components.

Compact Mechanical Profile
A streamlined footprint allows for seamless integration across a wider array of residential and luxury hospitality layouts.

Hydro Ozone Purification
Natural UV and ozone technology work continuously to keep your water crystal clear and pure.

WHY COLD PLUNGE?

Regular cold water immersion is known to restore your body and mind from the inside out.

Targeted Pain & Inflammation Relief

Cold exposure constricts blood vessels to ease post-workout muscle soreness and joint fatigue. Beyond athletic recovery, studies suggest cold therapy can help relieve pain associated with chronic inflammatory conditions like rheumatism and fibromyalgia.

Immune & Circulatory Boost

Exposure to cold temperatures stimulates vascular circulation and prompts white blood cells, T-cells, and antibodies to circulate more rapidly, activating your body’s natural defense systems.

Enhanced Mindfulness & Stress Relief

Stepping into the cold forces immediate mental presence. This intense sensory focus helps lower stress levels, improve sleep quality, and cultivate a quiet state of mental clarity that extends well beyond your time in the water.

DESIGN & VERSATILITY

Seamless integration for every aesthetic. Whether specified for a primary bath retreat, wellness room, or a luxury spa, Hydro Chill can be integrated into virtually any Hydro Systems bath configuration:

Freestanding Tubs

Pair with our custom architectural towers to discreetly conceal mechanical components while preserving clean lines.

Alcover & Drop-in Installations

Easily incorporated into custom tub surrounds and deck enclosures.

Bespoke Customization

Tailor your tub across endless sizes, colors, and finishes, or combine Hydro Chill with Whirlpool, Indulge, Thermal Air Bath, and Chromatherapy options.

AWARDS

 

Crafted in the USA since 1978.

Hydro Systems blends traditional hand-finishing with state-of-the-art robotics to create bespoke, healing works of art tailored to your exact vision.