WATER HEATING

摘要

A water heater is disclosed which has a casing (10) within which there are two heating elements (12, 14). The element (12) slopes upwardly from the mounting plate (16) which is secured to the casing's end wall and the other element (14) slopes downwardly. The element (12) is of greater heating capacity than the element (14). Temperature sensors (24, 26) are provided together with programmable timers (28, 30) for controlling the periods for which the elements are switched on and are switched off.