WATER HEAT EXCHANGER
Water heating is a thermodynamic procedure using a power source to heat water above its initial temperature. Typical domestic uses of hot water are for cooking, cleaning, bathing, and space heating. In industry, both hot water and water heated to condensation have many uses.
Domestically, water is usually heated in vessels known as water heaters, kettles, cauldrons, pots, or coppers. These metal vessels heat a batch of water, but do not produce a continual supply of heated water at a preset temperature. The temperature will vary based on the consumption rate of hot water; the water becomes cooler as flow is increased.