The safety arrangements installed on a water heater used to heat water for domestic applications should prevent the temperature exceeding 100oC.
The suitability of safety arrangements for other applications, for example industrial processes will be assessed on a case by case basis.
Where the source of heat energy cannot be relied upon in all circumstances to achieve the required minimum temperature to address concerns about microbiological growth an additional heat source should be available.
Please note: in England, Wales and Scotland this requirement is met by safety devices which satisfy the relevant Building Regulations.
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