Water and home heating account for most of your home's overall energy costs. The decision to replace a water heater often needs to be made in a hurry. Although standard water heaters usually last about 7 to 12 years, they can fail at any time. This may occur at night or on a weekend when there is little time to comparison shop.
Your choice of home water heating system may depend on the type of system that you already have as well as which energy options are available in your area.