Water heater

Details Water heater Water heater

F - Mech Eng,Light,Heat,Weapons

24

H

F24H 9/20 (2006.01) F24H 1/20 (2006.01) F24H 9/18 (2006.01)

Patent

CA 2700771

A storage-type water heater with a controller. The controller controls an upper heating element such that an upper zone water temperature is maintained proximate a temperature setpoint. The controller calculates a temperature differential based on a difference between an upper zone water temperature and a lower zone water temperature. The controller controls a lower heating element such that the temperature differential does not exceed a first limit during periods of low predicted water demand and such that the temperature differential does not exceed a second limit during periods of high predicted water demand. Periodically, the controller switches from the first limit to the second limit during periods of low predicted water demand.

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