On average when a person looks at their utility bill heating water amounts to approximately thirty percent of the bill. There is a better option and that is snellfirm.com the tankless water heater. With a regular water heater it continuously heats water even when you are out of the house sleeping, or eating. Even when it not required it heats water. Generally there is no water storage facilities with such heaters. Pros They never run out of hot water They are space and energy efficient .