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Low-Temperature Heat Network Requires New Approach to Legionella Risk - Interview PW.J.J. Van Der Wielen

Summary by KWR
Heat networks operating at 45 to 50 °C are attractive for the energy transition, but present a new challenge from a microbiological perspective. This partially eliminates the traditional protection of hot tap water at temperatures of around 60 °C. “When we move to low temperatures, a lot happens microbiologically,” says Paul van der Wielen, Principal Scientist Microbiology at KWR Water Research Institute (KWR). KWR is investigating, among other …
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Heat networks operating at 45 to 50 °C are attractive for the energy transition, but present a new challenge from a microbiological perspective. This partially eliminates the traditional protection of hot tap water at temperatures of around 60 °C. “When we move to low temperatures, a lot happens microbiologically,” says Paul van der Wielen, Principal Scientist Microbiology at KWR Water Research Institute (KWR). KWR is investigating, among other …

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KWR broke the news on Tuesday, September 29, 2026.
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