Chill Core 300

The Chill Core 300 turns any Kaldera tub into a set-and-forget cold plunge. It holds temperature within ±0.5°C across a 3–15°C range, so you set your target once and it maintains it through repeat sessions.

Inside is a titanium heat exchanger, which resists corrosion from chlorine or salt water treatments far better than the copper coils used in cheaper units. The built-in filtration pump cycles the full tub volume roughly every 40 minutes, keeping water clear between water changes.

Rated for tubs up to 350L, which covers the Plunge 320 and 80 comfortably. Runs at 65dB or below — quiet enough for a bedroom or home gym.