A method by which heated drainage water from a shower unit is used to warm incoming cold water through a heat exchanger before entry to a warm water mixer chamber

摘要

The heat exchanger (1) has an upper and a lower section joined by a tube through which the used drainage water (a) from the shower tray (7) and siphon (8) into the heat exchanger vessel to the drain outlet (b). Fresh cold water (3) passes through the heat exchanger to a mixer tank (6) also supplied with warm water.