Storage tank water heaters are the most common type of water heater in use today. These appliances consist of a storage tank that holds water, which is heated to and kept at your desired set temperature for use at any time. A storage tank water heater may contain electric heating elements, or require fuel such as gas or oil for a burner system. They provide hot water for all the sinks, showers, tubs, and other water-using appliances in single building or large space. They are larger in size to accommodate such high water demands as in whole building applications.
Tankless water heaters use either electricity or gas to heat hot water as it is needed. These systems require a certain flow rate to function, but can provide endless hot water with greater energy efficiency than a storage tank water heater. These can be used for either whole building applications or point- of- use applications. Point-of-use water heaters supply hot water to only a single fixture, appliance, or room. These water heaters are smaller in size, but must be installed near every area where you want hot water.