Cold plunges with UV-C sanitation
UV-C sanitation uses short-wavelength ultraviolet light (200–280 nm) to destroy the DNA of bacteria, viruses, and other pathogens in the water, preventing them from reproducing. The light is built into the filtration loop, so every time the pump cycles water through the system it passes through the UV-C chamber — no chemicals required.
Why UV-C works well for cold plunges
- Chemical-free: No chlorine or bromine means no skin or eye irritation and no strong chemical smell.
- Always-on protection: The lamp runs continuously with the pump, so the water is sanitised on every pass rather than relying on residual chemical levels.
- Low maintenance: No measuring, dosing, or storing chemicals. Lamp replacement is typically needed once every 12–24 months.
- Effective at cold temperatures: Unlike some chemical sanitisers that lose effectiveness in cold water, UV-C light works regardless of water temperature.
What to look for
Lamp wattage determines how effective the UV-C system is at the pump's flow rate. A higher flow rate requires a more powerful lamp to ensure adequate exposure time. Most consumer cold plunge UV-C systems range from 6 W to 20 W. Pairing UV-C with a good mechanical filter (to remove particles before the water hits the lamp) gives the best results.
Cold plunge products with this feature
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