ADouble-wall heat exchanger with visible leak path
BSingle-wall copper heat exchanger
CPlate-type stainless steel heat exchanger
DCoaxial heat exchanger with monitoring system
✓ Correct answer: A. Double-wall heat exchanger with visible leak pathDouble-wall heat exchangers with a visible leak path between the walls provide an additional layer of protection against cross-contamination of potable water with toxic heat transfer fluid.
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