Heat exchangers that employ a toxic transfer fluid must be separated from potable water using what method?

Heat exchangers that use a toxic transfer fluid require a specific method to ensure that the potable water supply remains uncontaminated. The appropriate method in this context is double-wall construction. This design consists of two separate walls, creating an inner and outer layer. In the event that the inner wall fails or leaks, the toxic fluid would be contained within the outer wall, preventing any contamination of the potable water supply that the heat exchanger may be transferring heat to.

This built-in safety feature is crucial in preventing potential health hazards to individuals who consume the water or use it for cooking and hygiene. By adopting double-wall construction, regulatory standards for health and safety are upheld, ensuring a reliable barrier to protect the potable water from any harmful substances that may exist in the transfer fluid.