WATER HEATER

摘要

The invention relates to a water heater (10) and to a water heater installation (500). The water heater includes at least two water chambers (12, 14), each defining a cavity (16, 18) therein and a heating element (24, 26) within each cavity (16, 18). The water heater (10) also includes at least two linking channels (20, 22) linking the two chambers (12, 14) in parallel and a water inlet (28) and a water outlet (30) in fluid flow communication with the chambers (12, 14) wherein one of the heating elements (24) is independently operable in a pre-heating phase when no water flows through the inlet (28) and the outlet (30), and wherein all the heating elements (24, 26) are operable in a full heating phase when water flows through the inlet (28) and the outlet (30).