Heat Recovery Technology: Old and New
Heat Recovery Technology: Old and New (1987)-Today only the foolhardy or uninformed would risk using ''old" type heat exchangers where potable water service is involved. However, where the heat is to be transferred to air or to a liquid in a closed recirculating system the "old" heat exchangers can still be used. It should be recognized that they are not leakproof and that reservoirs or expansion tanks should be regularly checked for the presence of ammonia fumes. The present day double wall vented heat exchanger though similar in function differs greatly in design and appearance.
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