Few appliances are so ubiquitous and useful in the modern American household as the water heater. If you ever use hot water, you probably have either a water heater or a hot water tank on your property. Compared to a hot water tank, water heaters are a much more efficient option. Instead of continually heating the water on your property, a water heater heats the hot water you need to use. This means you can save substantial amounts on your electricity bill with a water heater compared to a hot water tank.

A water heater...